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    Blog
    Revell Gato Class Submarine Conversion.
    I am about to start the most ambitious project to date. This one will be running alongside the three others currently on the go, The Police Boat which is nearly completed, The Dusseldorf Fire Boat which is well underway and the PTB upgrade. My intention is to change this Revell model into a static dive radio controlled Submarine. I am lucky that Martin555 has agreed to help whenever I get stuck which will be invaluable since he has already almost completed the same. I started by purchasing the model from Amazon for less than ยฃ50. I have also purchased the water tight tube for the electronics. I will make the end caps and sealed internal plugs from some 80mm diameter nylon I had at work. It will now come in handy that I am a toolmaker and have a considerable array of ma
    chine
    s at my disposal. I will turn the plugs next week and find suitable o rings. I have started to prepare the hull. There is an enormous amount of work required to adjust the standard kit. A lot of cutting and drilling. I have prepared the split lines and glued in the alignment pegs. I have ordered suitable shafts and propellers from the USA. They should be here in a couple of weeks. Next job is to stick the two halves together and start the cutting.
    3 months ago by MouldBuilder
    Forum
    What have I got?
    "That is a good model of a Thames lighter and I imagine the boat that started this post was very much like it before the wheelhouse was put on. Is it available as a kit, or just the plan?" It's a standard EeZeBilt 50+ model. That means it's been designed to be cut out of balsa sheet and assembled in the simple EeZeBilt fashion, and the plan has been put out for free download. It's capable of being made at any size or any material, but making it at 16" just nicely uses a single 1m sheet of 1/8"balsa. The idea was to produce simple, quick, cheap model barges so that the tug boys had no excuse not to be pulling a whole string of them. If you want it as a kit, I can send you a .dxf file and you can get someone with a CNC ma
    chine
    to do the cutting for you. Do you have a MakerSpace anywhere near you?
    6 days ago by DodgyGeezer
    Forum
    Chris Craft Cobra by Dumas
    No Hand stitching. I cut the material and had a friend that has a sewing ma
    chine
    do the sewing. I was very happy in the way it turned out. As for the gold painting it's the same paint I used on the fin. Both the seat are held in place by screws. I wanted to do the side walls the same way, but there's not enough room. The only thing that's holding up the completion is the glassing of the hull.
    11 days ago by JBRCfloats
    Forum
    Are there fairies.
    Hi DG. It looks a similar size, but definitely not the one I have. Plus that one has diametrically opposite brushes, whereas mine has three equally spaced brush positions. And I haven't seen the adjustable field windings on any sewing ma
    chine
    s vintage or new. Cheers Colin.
    11 days ago by Colin H
    Forum
    Are there fairies.
    Western Electric Sewing Ma
    chine
    motor - 1917 according to this ebay sale. https://www.ebay.com/itm/1917-Patent-Date-Western-Electric-Sewing-Ma
    chine
    -Motor-and-Foot-Pedal-AS-IS-/202510137622?nma=true&si=gGDjL1Ld56C2cpOn2TV9HqcjMmY%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557 Probably a field-wound motor of the 'Universal' type - can run off DC or AC. It will be series wound rather than shunt - just like the Taycols. So you could make it reverse if you want to fiddle with the electrics by using the Taycol site circuitry adaptations. It would probably have run off 110v AC, with a rheostat providing speed control, though a rheostat would have given you less power as the speed reduced, so the dual-speed brush system may have been an improvement to give you more power at slower speeds. Here is a picture of an original satisfied customer...!
    11 days ago by DodgyGeezer
    Forum
    T.I.D. tug
    For all who asked details of my smoke ma
    chine
    . The case in the 1st photo I got from Maplin some years ago, I have also made some for other people using 3mm plastic card, and that works fine, or just buy a plastic lunch box and use that. You will need to secure the mister/fogger to the bottom of the case with silicon, and thread the leads through the side/top,then make a hole for the funnel, I use two different sizes to make it easier to fit in the boat. Next, a cheap! mini fan, and a 3volt source,you can see the 2x1.5v clip in the second photo, I find this is just right for pushing the steam out. Lastly, a source to change the voltage up from 12volt to 24volt, the working voltage of the mister/fogger. Make sure all seams are covered with silicon, as you can see by mine it doesn't have to be pretty to work, and only I see it! I have put a couple of Ebay links of the items I use, as you can see, it is quite inexpensive......so have a go, joe๐Ÿ˜ btw..I use a 12volt 2.1ah, and on a full tank of water,(not full, as it won't work when it's full), I get 20mins steaming.If you need anymore info, just ask๐Ÿ˜ฎ https://www.ebay.co.uk/itm/DC-DC-4A-Boost-Converter-3V-32V-12V-to-5V-35V-24V-Step-Up-Power-Supply-Module/252676342631 https://www.ebay.co.uk/itm/New-Ultrasonic-Mist-Maker-Fogger-Water-Fountain-Atomizer-Air-Humidifier-24V/121548443136
    16 days ago by Rookysailor
    Forum
    Work with Balsa wood
    If you are bending things like stringers,
    chine
    spray rails etc soak the part you want to bend in a trough (if you have one- wallpapering trough is good) of boiling water for about 4-5 mins, -remove and bend around screws/panel pins set to the radius on a flat board and weight down till dry (long enough pins will let you stack a number of pieces). If you are bending sheet balsa, the softer the better, (across the grain and with it, careful bending across,- snaps easily if too firm or thick) This will also depend on how tight a radius you need, ( if only gradual- like a clinker dinghy) you might get away with firm balsa. 2mmx 10mm wide strips will follow a curve nicely. For a bow with a flare you will need to plank (vert or angled)with soft to med balsa strips (10mmx 2mm or thereabouts)- gives you room to sand and fair. The trick is to feel how the plank likes to lay around a flare with the least stress, and go with that angle if poss. If the hull past the flare is flatish you can use whole sheets to speed things up. For the truest shape, complete planking gives the best result (although a bit time consuming and a bit more sanding involved). JB
    17 days ago by jbkiwi
    Forum
    Are there fairies.
    "as you can guess new sowing ma
    chine
    " Can it sow spuds Martin ๐Ÿ˜๐Ÿ˜‚ Sorry ๐Ÿ˜” ๐Ÿ˜Ž
    18 days ago by RNinMunich
    Forum
    Are there fairies.
    Silly boy Martin, I did a similar thing with a scrap ma
    chine
    , but I used a jigsaw blade and it worked perfectly well for about 3 years. Setting the foot about 25thou above the workpiece it cut wood, sheet brass, sheet steel and aluminium. I've now got a bandsaw, picked up at local auction for a tenner. Cheers Colin.
    18 days ago by Colin H
    Forum
    Are there fairies.
    Hi Colin, Many years ago In the long and distant past I put a small piece of fret saw blade in an old Singing sowing ma
    chine
    and tried cutting some soft wood, it worked out to be a very expensive experiment. The wife was not happy nether was I, as you can guess new sowing ma
    chine
    . Martin555.
    18 days ago by Martin555
    Forum
    Are there fairies.
    Definitely not sewing ma
    chine
    , my other hobby is restoring vintage sewing ma
    chine
    s. Local retired electrical engineer thinks it may have been a generator /dynamo. Cheers Colin.
    18 days ago by Colin H
    Forum
    Are there fairies.
    Spare space might be for running in reverse Colin, (move a brush to the other side) or maybe for a different speed.? Maybe cancel thoughts on wiper motor, looks like a beast! Might have had drive belts on it at one stage (old converted sewing ma
    chine
    motor?) Industrial ma
    chine
    perhaps? JB
    18 days ago by jbkiwi
    Response
    Re: Lighting and other tweaks ;-)
    Hi Steve, Actually Martin told me what the lamp is signalling๐Ÿ˜‰ I know Morse but can't read it very well๐Ÿค” In the COMMS systems I designed for naval vessels we had ma
    chine
    s to do that for us๐Ÿ˜ BTW: all Likes added to my post above should actually be credited to Martin - it's his work not mine! Me? I'm just Adm. SO CCaBW (Senior Officer Chief Cook & Bottle Washer) ๐Ÿ˜Ž
    24 days ago by RNinMunich
    Response
    Re: Short video of the first test of the new vacuum table
    That was just a quick test, - did have about a 5mm spacer on it, but the one I did for the plane had about 30mm. Depends a lot on how thin the material is as well and you have to allow for trimming. .5 mm would have gone around a lot better. You also have to have holes through the plug as well so it pulls around the plug. The CKD furniture company I worked for (largest in the South Pacific) pioneered round edge vinyl covered table tops in NZ using a big German press which they modified. Germans said the thin Vinyl that the company wanted to use would not work,- took them a year of experimenting and proved them wrong. Ma
    chine
    used a large silicone blanket and oil heated platen.
    27 days ago by jbkiwi
    Forum
    Workshop
    I have finally finished the new Shipyard. I had help to do the final build as it came as planks of wood. I painted the floor today which only leaves the outside walls to cover with a second coat. I will try to get a workbench installed before I have to go back home and work. This will be my retirement office when her in doors who must be obeyed says I can have the day off. I am lucky as my testing `lake` is at the bottom of the garden. The Danube.๐Ÿ˜€ I will buy a few small ma
    chine
    s over the next year or so and then, hopefully, have a bit of uninterrupted building time. I have seen the lovely pictures of Colin`s new workshop but I would love to see where others do their work as well and the equipment used.
    1 month ago by MouldBuilder
    Forum
    Movies.
    Re crossing bars etc, have you seen the videos of the Safehaven marine (Cork) 'Thunder Child' a private companys' effort to make a 'bullet proof' rescue/patrol boat and general purpose rough water boat. Amazing ma
    chine
    !, goes through, over and under anything,- FAST. Would make a good model subject.
    28 days ago by jbkiwi
    Response
    Re: Short video of the first test of the new vacuum table
    You never said what plane it was - always wanted a vacuum former - been using a paint removing heat gun to mould 2mm perspex - any thicker - bubbles form . Your ma
    chine
    is interesting to say the least....... The paint strippers get up to quite a temperature - would one of those blowing into a closed box work ?
    29 days ago by redpmg
    Forum
    Movies.
    How about "The Eye of The Needle" - Where the "Nadel" is landed by an Eboat in the Essex? marshes - the Eboat looked suspiciously like 102...... Brilliant acting by Donald Sutherland as usual - but the fake start rather spoilt it for me .......... Bit like seeing a pair of ma
    chine
    guns being fired by a Piper Cherokee 180 pretending to be a Messerschmidt 108 Taifun.
    1 month ago by redpmg
    Forum
    Workshop
    Just checked Hobby city, (main hobby shop in Auckland) AAAAARGH, some prices- mill drill $450, 24108 miller $2103, 24350 miller, $5398, 27110 micro miller $720, CNC ready miller $7802 ! and these are bare ma
    chine
    s which need the 'accessories to be able to do anything with them. A bit beyond my meager finances methinks, could almost buy a Triumph 2000 lathe for that much second hand . (had a quick look and found a Bridgeport power feed mill for $7200. Try- Hobby city.NZ -should get you there. Bet they don't have them in stock and you have to wait 3 months (if you are lucky) Pics of Hobby city owners plane before and after. Decided he'd had enough and turned it into a submarine at high speed. SA guy, previously represented NZ in world precision flying comps (second) shame, very clever guy and nice with it. You never know!
    1 month ago by jbkiwi
    Forum
    Workshop
    "Nifty little lathe,- Proxxon- looks German? " Correct! (Richtig๐Ÿ˜‰) https://www.proxxon.com/en/micromot/24150.php The little milling ma
    chine
    is also Proxxon. https://www.proxxon.com/en/micromot/27110.php There's also now a CNC ready version - There wasn't back then ๐Ÿ˜ญ๐Ÿ˜ญ https://www.proxxon.com/en/micromot/27112.php Might invest in the MICRO compound table KT-70/CNC-ready! to upgrade my manual job! They have a range of bigger versions as well https://www.proxxon.com/en/micromot/precision-lathe-and-milling-systems.php Not the cheapest around, but built like the proverbial brick "whatsit" house๐Ÿ˜‰ Google / Ebay around, should be able to find some at reasonable prices. Think I paid around โ‚ฌ150 for my little lathe back then. The miller around โ‚ฌ90. Happy machining folks, don't forget the goggles๐Ÿค“ Cheers, Doug ๐Ÿ˜Ž PS Odd!? Someone else's pics keep creeping in?? A new phenomenon!๐Ÿ˜
    1 month ago by RNinMunich
    Forum
    Workshop
    My granddad's pal/neighbour had an engineering workshop in his Glasgow tenement flat (ground floor)from 1945 until he passed away in the mid 70s he used to do sub contract work for D&W Hendersons shipyard don't know what the Corperation thought as it was a council house .I remember there being a big Colchester lathe and a milling ma
    chine
    and a pot arc welder,thought I should mention he was single and the house smelt of coolant my grampa used to do a lot of welding for him.
    1 month ago by marky
    Forum
    Workshop
    Perfect hobby ma
    chine
    s, I'm in the wrong country!. We used to have a lot of small new lathes for sale here in ma
    chine
    ry outfits for around $1200 NZ but I haven't seen any for a while. I could do with a small lathe especially for boat stuff. We had a Triumph 2000 (lathe not car) and a Bridgeport mill and all the gear when I was in the site services dept in the big woodworking co I worked for. I made good use of those, plus in my workshop I had 2 German RS2000 tool grinding ma
    chine
    s which were great for touching up all your router bits and saw/ planer blades etc and a
    chine
    se mill which I reco'd when the other guys didn't want to use it. Made my sons cars' frame and running gear (all 10 speed bike gears modified etc', -everything adjustable for growth) while I was there . Sure great if you have the gear!
    1 month ago by jbkiwi
    Forum
    Workshop
    "access to everything" .... even the coffee ma
    chine
    and microwave just round the corner behind the bookcase!๐Ÿ˜‹ And a TV/Monitor attached via HDMI cable to my PC in the other room - so I can hear the "Honks" and keep track of what U Lot are up to๐Ÿ˜‰ ๐Ÿ˜Ž
    1 month ago by RNinMunich
    Forum
    Workshop
    I was lucky that when my work was up grading ma
    chine
    s if I could carry the old one I would have it and stashed it away for later use ,I got a pillar drill from the jewellery department because it wasn't drilling at 90ยฐ got it home and all that was wrong was the table hadn't been squared properly,still keep in contact with my old squad so if anything comes up they let me know they also keep loads of handy off cuts .will post some photos of the workshop interior when I get the gear moved in ๐Ÿ‘keeping my fingers crossed a 3D printer might need upgraded๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚or perchance a laser ๐Ÿคž
    1 month ago by marky
    Forum
    Workshop
    I am doing exactly the same as you Doug. I am buying all of the items, including kits and ma
    chine
    s, over the next two or three years ready for my retirement move to Hungary. I wish I could bring my factory ma
    chine
    s with me. I have a 1 metre CNC machining centre along with a 16 electrode changer CNC spark eroder, Bridgeport mills, J&S grinders and others. I think my shed is a little small and possibly not enough power as the maximum single phase power supply here is only 32A. Small bench ma
    chine
    s it is then.๐Ÿ˜Š
    1 month ago by MouldBuilder
    Forum
    Workshop
    Looks good Doug. The ma
    chine
    s are exactly what I had in mind. We need the ma
    chine
    s Martin. You do not.
    1 month ago by MouldBuilder
    Blog
    36'' Thames River Police Launch by Robbob
    After the successful build of the โ€˜Vintage Model Worksโ€™ RAF Crash Rescue Tender I was asked by Mike Cummings of VMW if I would undertake to build a prototype of their new model with the aim of checking the construction method and the assembly instructions for accuracy before the kit is put into production. The model is a โ€˜Thames River Police Launchโ€™ and is based on the original design by Phil Smith for the Veron company, this was a very popular model kit in the late 50โ€™s and 60โ€™s and sold for the princely sum of 43 shillings and tuppence, approximately ยฃ2.15 in todayโ€™s money but an equivalent cost of ยฃ48.50 in 1960. This design has been updated to accommodate electric propulsion and radio control by Colin Smith, the son of the original designer and it has been re-scaled to be 36โ€ in length where the original was 24โ€ which gives much more scope for detailing and provides more โ€˜hiding roomโ€™ for the drive, control systems and all the associated wiring. The kit produced by VMW uses the same construction techniques as the original and the materials are a combination of balsa and plywood both of which a laser and CNC cut for precision. The ply and balsa materials supplied are of very high quality as one would expect from VMW and all the stripwood for the
    chine
    s, rubbing strakes and deck detailing is included, even the dowel required for the mast is in the box, very comprehensive! The kit also includes white metal fittings such as the fairleads and stanchions, and the searchlight and horns. The glazing for the windows comes in the kit too. The instruction sheet supplied is in need of revision as it is largely taken directly from the original as written by Phil Smith and some of the terminology needs updating, for instance the ply bottom and side skins are referred to as โ€˜strakesโ€™ but I understand that a re-write of the instructions is in hand along with an updated plan showing the best positioning for the motor, prop-shaft, battery, ESC, receiver, rudder and servo. During construction I have added a few additional pieces of ply or balsa as reinforcement or supports and substituted some balsa parts for ply where I thought a stronger material would be better. I also added some hatches to give access to the wiring at the bow and the rudder & servo at the stern but largely I have not gone โ€˜off planโ€™ to any extent. The pictures show the model in itโ€™s present state (Nov 2018) and is ready for painting and finishing.
    10 months ago by robbob
    Forum
    EeZeBilts From Keil Kraft
    Here is a Shapeoko 2 - my eShapeoko is a similar ma
    chine
    - cutting steel. You will see that you need a decent spindle motor, which is not surprising. But the framework is adequately rigid. I have over-specced what I have to allow for expanding for future use. I would not be surprised to find that a ma
    chine
    which was limited to cutting balsa, plastics, obeche and light ply (which would cover the vast majority of marine modelling) could be sold for less than ยฃ100. Unfortunately, there are too few customers to make it worth designing such an item.
    1 month ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    You are right of course - in the UK you would also have to have a safe extractor/collector unit for the fumes/dust - however the US made table top models are self contained - BUT you only have a A3 sized bed whereas ours has an A1 and can take objects up to a foot high for engraving, plus a rotary attachment for glasses , bottles etc. The water cooler is a separate unit which now costs the better part of R10k. Better half had her aluminum tubed Universal 200 re-gassed (they run on CO2 at about 38kv - at 80w so minimal current) and that set her back about R80k some 22 years ago. Pyrex type glass tubes are only about R12k now however. You also keep the lid tightly closed unless you are an idiot - plus they all have a safety switch to shut the laser off if the lid is lifted (which I have seen bypassed). There is always some stray laser beam about and deflection off the bed which does not do one much good. Especially eyesight. So the ma
    chine
    has a thick dark yellow/orange perspex inset on the lid and you should wear safety type glasses the same coloration which act a bit like polarised lens. As a matter of interest ours ran for a year in the spare bedroom - with the extractor unit venting through a french door panel - would be severely frowned upon by 'elf & saveless'.
    1 month ago by redpmg
    Forum
    EeZeBilts From Keil Kraft
    "...I'd rather cough up a bit more and know that I could do something with it!.." Quite right! When buying, people need to understand the important features of a product, and with new technology it is easy for the advertisers to conceal these. For a CNC cutter, stiffness is very important, particularly if you are going to cut metal. The ma
    chine
    must not deform appreciably when it puts a strong force on the workpiece. It also needs adequately powerful stepper motors to put that force on. and, of course, it needs to move the cutting head to all parts of the workpiece. I was interested to see that the spec states 'max travel distance' - I would have expected it to say 'max cutting dimensions', and wonder if these are less than the figures quoted. At least we can specify a cutting area ambiguously, so that modellers can understand what they are getting. I would guess that 1ftx1ft cutting area would be fine for most aeromodellers, while 1ftx1yd is more what boat modellers want. But it is easy for an individual to chose. Motor power requirement is harder to define - it depends so much on the leverage designed into the mechanics. Screws have more advantage than belts, for instance. And if you are only count to cut softwoods you can get away with much less power than cutting steel! Usually I would like to see the steppers having between 5000 and 10,000 gfยทcm of torque - though that is a 'piece of string'. Rigidity is even harder to estimate. You can get some feel when the seller says that this ma
    chine
    will not cut metals, or 'is an engraving ma
    chine
    '. The other indicator is weight - rigid ma
    chine
    s are going to be much more massive. If the frame is light it will bend under stress. Though if you are using a laser...
    1 month ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    My thoughts exactly DG. I'd rather cough up a bit more and know that I could do something with it! (Still got a few bob left in my savings fund๐Ÿ˜Š) Think I'd better get the hang of my 3D printer before lashing out on another ma
    chine
    though! ๐Ÿ˜Ž
    1 month ago by RNinMunich
    Forum
    EeZeBilts From Keil Kraft
    There doesn't seem to be any complaint about the ma
    chine
    fundamentals in those reviews - their problems are with understanding how to use it, and the quality control and packing. In fact, one said that the quality of the parts was 'very good'. Nothing was said about some of the most important aspects of the ma
    chine
    , which I have extracted below: Max travel distances: X: 160mm Y: 100mm Z: 45mm Repeat positioning accuracy: 0.1~0.05mm (no load) Max material depth: 30mm Something that can only do 4" max dimension parts is very limiting! That positioning accuracy would be ok for load, but they spec 'unloaded'? I know that will depend on the material and cutter, but I would like a better understanding of the stiffness than that... You can get ma
    chine
    s with cutting beds of 12" for between ยฃ100-200 on ebay - but I think boat modellers would be better off getting a 36"x12" Eshapeoko or similar. Base cost of that would be ยฃ300, plus ยฃ100 for motors and controller...
    1 month ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    HobbyKing CNC mill- Hmm! Seems a bit "cheap and cheerful"! Only two reviews, which aren't very encouraging๐Ÿค” "Great price nearly impossible to use mill Packaged great, arrived fine and nearly fully assembled. Documentation and software is horrible. I spent two full days trying to see if I could trick into working. The supplied software won't move the Z or moves Z but won't turn the tool. I needed to get back to work so it sits in a box waiting for another couple days to find some other way to make it useful. When I have a real need for it, I'll spend the time but for now, not worth it to me. Falls short - just a touch Dave The ma
    chine
    arrived exactly as shown, but had to be completely disassembled and reassembled as every nut and bolt was loose. Neither the table nor the motor assembly were straight. It took about 2 hours to make sure everything was zero-zero. One of the two plastic angle supports was broken. Instead of making another (all plastic parts are 3D printed) I opted to use aluminum angle. The overall quality of the parts is very good. See Community Discussions about the failure of the software." https://hobbyking.com/de_de/t8-diy-3-axis-cnc-milling-ma
    chine
    -w-arduino-and-grbl.html Cheers, Doug ๐Ÿ˜Ž
    1 month ago by RNinMunich
    Forum
    EeZeBilts From Keil Kraft
    Yep, that's what I thought. OK for formers or bulkheads on airyplanes, but useless for a boat without a considerable extension. Anyway we should be encouraging people to make stuff conventionally and just use ma
    chine
    s to save time perhaps when they get to be our age! But come the glorious powercuts, brothers and sisters, they'll all be f***ed and we'll all be knifing away happy as Larry. Martin
    1 month ago by Westquay
    Forum
    EeZeBilts From Keil Kraft
    A brushed 775 motor? Standard 'Johnson Can'. Cheap and powerful, for power drills - a bit more powerful than I am using. For cutting curvy balsa shapes, as aeromodellers do, it would be ideal. Most modellers cut shapes that are long and thin. The only problem for marine modellers is that we typically require shapes that are about 36"/1m long, while aeromodellers rarely look for aerofoils which are longer than 1'/30mm. And the longer the base of a cutting ma
    chine
    , the more it will cost...
    1 month ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    Apparently the ma
    chine
    uses a brushed 775 motor. Martin
    1 month ago by Westquay
    Forum
    EeZeBilts From Keil Kraft
    ".... I have also been looking on utube at DIY CNC Ma
    chine
    s using old DVD Drives and an Arduino board...." You can probably make a ma
    chine
    for nothing out of scrap if you know what you're doing - but I wouldn't advise a beginner to learn that way! The issue is getting the precision of movement together with enough stiffness to be able to apply adequate force when cutting and not have the structure bend. For modelling, we have an advantage in that many of our materials are thin and easy to cut, compared to typical professional requirements. A common cutting tool is a Dremel - which we often have, and you can see that a model boat motor can easily cut balsa - and probably light ply...
    1 month ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    Hi DG, I have seen your thread on your CNC Ma
    chine
    and I have also been looking on utube at DIY CNC Ma
    chine
    s using old DVD Drives and an Arduino board. I will have to do a lot more research in to it as it is a good way to cut bits out for model making. Martin555.
    1 month ago by Martin555
    Forum
    EeZeBilts From Keil Kraft
    "....I am looking forward to the next stage....." There will now be a short intermission while I sort out other things, and I suspect that a build will start sometime in September. Or later! In the meantime, this thread has introduced a number of issues apart from describing the egg-box structure that Ernie Webster used in the KK EeZeBilt series. It suggests that if CAD packages are used for model boat design then the plans created can readily be shared with other modellers over the Web, and shows that personal CNC ma
    chine
    s costing a few hundred pounds are a useful supporting workshop tool for this process. Any comments on the above points would be read with interest!
    1 month ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    All the hard work would have now been done, if I had got the waterjets and had finished designing the stern. We will have to wait for that, as well as a delivery of balsa... But I have a couple of spare sheets of balsa and a few final parts, so I can give you a short sample of how things will go on from here while the ma
    chine
    is cutting them. We want to cut parts out of a 4"x36" balsa sheet so I draw up the boundaries, and fit the parts in at appropriate places (fig36). The sheet is oriented vertically, because that's how my CNC ma
    chine
    wants to see it, and the top right corner is positioned at 0:0, so I know where my origin is. Then I remove all the lines that I don't need to cut. Because I have lined up the long straight edges with the edge of the balsa, I don't need to cut along them. I don't need to cut the boundary lines either - so I have a rather odd drawing for final cutting as at fig37. From now on we don't need to look at any more drawings. I save just the bits I want to cut as a .DXF file - which is a standard CAD drawing format. Then I take this file and input it to a free software package called 'DXF2Gcode'. Which, you will not be surprised to hear, outputs instructions for cutting those lines in G Code, which is a standard language for controlling cutting tools. The language looks like this - my comments in brackets: G90 (Absolute programming) G21 (units in millimeters) G17 (We are working in the XY plane) G40 (Cancel automatic tool radius compensation.) G49 (Cancel tool length compensation.) G28 (go to the pre-programmed Zero position directly over the balsa sheet) G92 x0y0z0 (Set this position to Origin Zero. All distances will now be measured from here) G0 Z -10.000 (drop the cutting tool to height -10mm - just above the balsa) (*** LAYER: Layer1 ***) (* SHAPE Nr: 2 *) G0 X +0.000 Y -68.551 (go to the first place to start cutting) F60 (set the feed rate to 60) G1 Z -15.400 (drop the cutting tool through the z axis to height -15.4 - this cuts almost completely through the balsa, leaving just a thin web underneath to hold the part in place) G1 X -25.258 Y -68.525 (Move the cutting tool along the x,y axis to cut the first line) G1 X -25.255 Y -65.350 (Move the cutting tool along the x,y axis to cut the second line line) G1 X +0.000 Y -65.350 (Move the cutting tool along the x,y axis to cut the third line) G1 Z -10.000 (raise the cutting tool along the z axis out of the balsa) You can easily learn the basic commands - but you don't need to as DXF2Gcode just creates a working cutting file for you. Next, you put some balsa in the ma
    chine
    , turn it on and send the G Code commands to it. This is done with another free software package called 'G Code Sender'. The names are quite descriptive! I enclose some photos of what happens next, and a 'media file' (video) which, as you know, you download by clicking on it, and then clicking on the miniature little blue square on the top left of the screen. As you can see, there is very little dust with a thin cutting tool, and the sound from a 12v motor running at 10v is low. This was recorded with a camera within a foot of the cutting tool... After that, it's just an evening of taking the parts out of the balsa sheets, assembling them and gluing up...
    1 month ago by DodgyGeezer
    Forum
    Water Jets
    "...DG if you have a 3d printer you must have the design software for it too - otherwise its useless ..." I said I 'can get one printed'. Dodgy Geezers can call in favours from all sorts of places! And not only plastic deposition ma
    chine
    s either - stereo lithography or selective laser sintering (if you want to 3-D print in tungsten) would be available through university contacts. As would design modification...Though, given how long it took me to get a pair of rather specialist gears lapped the last time I wanted a set, I would match RN's comment in saying that I wouldn't hold my breath!
    1 month ago by DodgyGeezer
    Directory
    Aeronaut Jenny
    Test outing today of newly completed aeronaut Jenny. Next outing will have a driver installed, but his shirt is on the sewing ma
    chine
    ! Goes like stink on a Turnigy SK3 brushless motor, 50amp ESC, 3S 3000mah lipo and a kg of lead! Might drop it down to a 2s next time out and will get some running photos when I have assistance.
    1 month ago by Skydive130
    Forum
    EeZeBilts From Keil Kraft
    I used one years ago called Rhinoceros, which boat builders were using. It is 3D and a lot of fun. Does rendering and has a library of std shapes (polygons, triangles, splines etc) which you can grab and contort into anything you want. Been meaning to see if it will work on my new computer, (I took it off an earlier ma
    chine
    as it took too much memory to run) and never put it back on the next ma
    chine
    . The ma
    chine
    I have now would run it no problem if it was compatable with 8.1 (must drag it out and try it) my older ma
    chine
    is on Vista so it may work, Used to work on 2000 but might be too old now which would be a shame.
    2 months ago by jbkiwi
    Forum
    Veronica
    You are coming on well. As far as bumps and blemishes are concerned, do you want your Veronica to be the latter day, pristine racing ma
    chine
    that Everards produced hoping to carry all before her, or the work a day version from some years earlier, when she would be carrying cargo all the year, then go on the yard for a 'tart up' just before the Barge Match. Fair winds and calm seas, Nerys
    2 months ago by Nerys
    Response
    Re: 40'' Seaplane Tender, new build P
    Not sure if I can put much more up front Rob, it balances just in front of the motors now so will probably need a bit of rear ballast. I'll see how it floats before getting too carried away, although still working on the smoke out the exhaust idea (have 3 smoke ma
    chine
    s to experiment with.)
    2 months ago by jbkiwi
    Forum
    Magnetic motors
    My ma
    chine
    is pretty quite as well. Must have a look to see if it's got a Variable Pitch Drum!๐Ÿ˜ ๐Ÿ˜‚๐Ÿคฃ
    2 months ago by RNinMunich
    Forum
    Magnetic motors
    Much like what they have done with washing ma
    chine
    s. I'm amazed at how quiet a direct-drive ma
    chine
    is on full spin....
    2 months ago by DodgyGeezer
    Response
    Re: On the water!
    Very true! Fishermen do love a sub!! Showed one of my fishermen friends earlier, he asked how I made the trawls. Told him it was the bags you put your socks in when they go in the washing ma
    chine
    and a satsuma bag for the cod ends.. He said a couple of two hour tows across the lake should give a good haul of satsumas!!
    2 months ago by GrahamP74
    Blog
    40'' Seaplane Tender, new build P
    Trial fitting all the plumbing for the heat exchanger to make sure coamings will still fit. Small pump behind port motor is the circulation pump and the other is the raw water pump. Also fitted the ESCs and made the battery holders. would have liked the batteries and pumps nearer the stern, but not enough room under the floors. May have to put a few sinkers in the stern to get the WL correct. That can come at the end once everything else is done, (paint etc) Rudder system is also temporarily hooked up and works fine. Will remove and test water system shortly. Using 6mm silicone hose for the raw water pump for better flow. As can be seen, everything tucks away quite nicely out of sight, (was sort of like death by a thousand cuts,- fitted by a thousand slots!) some pretty close fits here and there. could have done without the heat exchanger but I don't do things the easy way. Got to try fitting a smoke ma
    chine
    in somewhere so I can have smoke coming out the exhausts with the water (more tubes, more bits!) and a sound unit! Might be pushing it, but I managed to fit twin units on the HSL and that's a lot narrower. Might be a rack system yet, plenty of room upwards in the cabin. Don't really want to put anything in the wheel house, just wheel, instruments etc.
    2 months ago by jbkiwi
    Forum
    Boat retrieval
    There are a number of commercial 'missing signal' units available. Fly boys use them to set controls to default safety, or sound a beeper for finding a lost aircraft. I believe that there are some specific ones for subs. Washing ma
    chine
    s and boilers both have pressure detection units inside. This is what a typical one looks like. They are mechanical microswitches operated by a diaphragm. The blue screw sets the pressure at which it operates. They could form the basis for an independent safety system - emergency blow with a Sparklets cylinder, for instance, or releasing a 'sub down' tethered buoy.....
    2 months ago by DodgyGeezer


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