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    Forum
    Posting updates on Model Boat Clubs and lakes
    I have been trying to post an update on the above for our Club pond and every time I try to post I get a message pop up saying "Please select category" but there is no category to select. Is it me or is there an issue with the
    software
    ? Alan
    10 days ago by ads90
    Forum
    EeZeBilts From Keil Kraft
    HobbyKing CNC mill- Hmm! Seems a bit "cheap and cheerful"! Only two reviews, which aren't very encouragingπŸ€” "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 machine 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-machine-w-arduino-and-grbl.html Cheers, Doug 😎
    9 days ago by RNinMunich
    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 machines 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!
    10 days 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 - unless you are only ever going to make other peoples designs - very easy to add stuff & modify designs if you know how - friend has one - manipulates its faster than I do Corel - but its purely commercial for him - so no freebies . unfortunately ...........
    10 days ago by redpmg
    Forum
    EeZeBilts From Keil Kraft
    In the 80s they built
    software
    to last! Cue 4 Yorkshiremen sketch... In 1988 they did not have much concept of elements - only vectors...unfortunately the current version of my package (which I am sure will do everything) would set me back around Β£1,500 for the cheapest item... The only way I could handle this would be to manually type text comments at all places. Which would involve writing a book...
    11 days ago by DodgyGeezer
    Forum
    EeZeBilts From Keil Kraft
    Now we are on the home straight! We have a drawing, a reasonable structure, and we can start pulling out the detail. It's at this stage that I usually confuse myself completely, since I will make numerous slight alterations to put bulkheads and formers in better positions for several reasons - internal layout, better strength and balance.... and I end up with several dozen slightly different hull designs, each of which are slightly incompatible with numerous slightly different bulkheads, and I then lose track of which parts go with which others... However, here are some examples of the output from this stage. The superstructure base(fig32) is going to have to be made from parts as I mentioned earlier. The bulkheads (fig33) can now all be drawn with their slots and tabs, ready for assembling into the classic egg-box on the sub-deck (fig34). The front formers and the keel are taken off the drawing, again with tabs drawn (fig35)... There will be quite a number of other parts to be drawn and made - the transom and other flat sections of the stern, the triangular bulkheads under the subdeck, the trapezoid plates which go to make up the funnel and mast, and other details like the anchor well. Almost all of these parts will be uninteresting rectangles with dimensions taken off the drawing, so I am not going to list them all down here. The full set of parts, however, will be needed when it comes to the cutting stage, because we will be trying to get as little wastage as possible from the balsa, and sneaking little triangular formers into all available gaps on the sheets. I will take a bit of a break now, because I need to get the water-jets delivered before doing the final stern design - and I am running short of balsa, so I will need more of that! I may cut a few parts on a sheet of 1/8" inch as an illustration. To do this you simply arrange the parts you want into a 4"x36" rectangle, load the cutter with a 4"x35" balsa sheet and send a file describing the parts to the cutter over a USB link. We will cover the
    software
    used and the stages of converting the drawing file to cutting instructions at that point...
    12 days ago by DodgyGeezer
    Forum
    Where are they?
    Most modern electronic equipment is fitted with a Critical Needs Detector. The CND is a miracle of modern
    software
    - it can automatically determine whether you REALLY need any item it is bundled with, and only at that point will it create a bug, total systems failure, or, in your case, simply make the equipment unavailable. Seems to work particularly well with photocopiers...
    27 days ago by DodgyGeezer
    Blog
    Aft running light!
    It’s been really hot here! Haven’t had time to go to the pond! But, have kept myself busy on the Computer! Have done quite a few upgrades to my Computer! I have upgraded it’s
    software
    and hardware wise! I did however take time out. To put an aft running light on Brooklyn! I know, I know eventually I’ll get to the pond! πŸ™‚
    1 month ago by figtree7nts
    Forum
    Batteries in a DX5e
    Just had a look DG and it seems that it uses your phones internet connection... Yes. Everything now uses the internet transmission protocol - even, in most cases, your normal land-line phone. Free service will assume that there is reasonably unlimited internet provision, which is the case in most populous areas in the Western world, but can be a problem out in the country... Live streaming discussions are often provided by web sites - I don't know if there is free
    software
    for these which lets external people join in...but you are correct that video - particularly HD - is going to chew up bandwidth...
    1 month ago by DodgyGeezer
    Forum
    Batteries in a DX5e
    "Would be great if we could work out a cheap way to video group chat..." I thought there was a lot of free conference call
    software
    . WattsAp does it, I believe...
    1 month ago by DodgyGeezer
    Forum
    CAD with Designspark Mechanical.
    The basic principles are quite simple really, Everything is worked out on a co ordinate system, you could say fancy map reading or navigation. A map is divided into squares, each square being part of a numbered grid, same on a nautical chart. so to get from A to B, you navigate accross the chart, so point A may be square 21/06, 21 squares along and 6 up. Point B is say 18/32 so 18 along and 32 up. (asleep yet?) to get from A to B you will plot a route through the grid from one reference to another. Similarly, our CNC router, laser cutter 3Dprinter plotter etc works on the same principle, we have 3 axes, X Y and Z X being left to right, Y back and forth and Z up and down. Cad
    software
    converts a drawing, or draws as a set of co ordinates, so for a 2 dimensional square, the co ordinates could be, say, X0 Yo, bottom left corner, and X10 Y10 the top right. X5 Y5 would be the center of the square. To add a 3rd dimension, the Z axis gets involved, so on a 3D print, the first layer would be z 0.15, second Z 0,3 etc. I am using Designspark Mechanical to illustrate, the photos are, hopefully self explanatory... Next time will prepare the object for 3D printing.
    2 months ago by Nickthesteam
    Forum
    CNC boat kits...?
    "...To prevent parts falling out, There is a low tack film sheet that airbrush painters users that you could stick to the under side of the wood...." There may well be. But it turns out to be easy to just specify a cutting depth which has exactly the same effect. I was surprised at how precise these machines can be. And I'm running off such archaic
    software
    that I would have to do tabs all manually - a lot of work....
    2 months ago by DodgyGeezer
    Forum
    CNC boat kits...?
    Also tell the cam
    software
    to leave tabs to hold parts in the parent stock......
    2 months ago by Nickthesteam
    Forum
    Re: 3D Printing.
    Now that is an interesting question indeed, Martin! In the "One to One" scale world, I have in my lifetime watched the steady march of machines taking over what i would describe as "Hand Skills" I have memories of being a trainee mechanical engineer and spending some time in a heavy machine shop and watching this guy "Knock on a cut" with a hide mallet. Just ease the lock nut and a tap with the mallet and he could put on a couple of thou! Today it is all CNC and robotics. The skill being in the machine maker, the
    software
    designer and the guys & gals that programme them. Now I am not going to dare to say who is more skilled the guy with his mallet or the guy who uses the
    software
    . They are both skilful in their own right. So if we turn that on its head and apply that to 3D printing.
    software
    driven accurate 3D modelling against hand and eye skills. That is for you hardened purists to argue over. However I do just wonder if it may be a way forward for us to attract the next generation of modeller away from their X Box or similar to a laptop and printer to make a modern model with a 3D printer. Was it such a heinous crime against modelling when Vac Formed parts arrived or heaven forbid Glass Fibre Hulls. I have a friend who uses a CNC milling rig to make the plugs for his gun turret silicon rubber moulds he uses to cast resin ones from. Is this not verbally the same? For me the choice will be what is the best way to make the part I need. When a logical engineering decision is reached, just get on with it and make a great model to be proud of. Great question Martin 555 am sure this will create loads of responses and run for ever
    2 months ago by ikseno99
    Forum
    Recent Down Time
    "The hosting company say the database was locked by the security team as SPAM content was detected in the forum table. Getting it unlocked proved slow and now it is unlocked, I can't see any issue with it." That raises a lot of questions! Did they know that locking the database would drop the site for 24 hours? If not, they made a technical error. If they did, I would like to see the security justification for this. Malicious
    software
    - maybe close down the site if you can't clean it immediately. Spam - surely inform the webmaster and ask what should be done? The spam would have to be very bad to take the site off-web. And surely you would be able to show the webmaster what the problem was later? I wonder if there was a technical balls-up and this is a convenient excuse? Security is NOT about closing things down if you hear a rumour that there might be a problem - it's about running a business so that there are no nasty surprises. The security team is responsible for running a service just as much as the ops team are. Security should be running things safely - with the accent on 'running'. If they don't, they are just another DoS threat. I would ask for a report from security which includes the reason for the locking decision...
    3 months ago by DodgyGeezer
    Forum
    Brushed to Brushless upgrade
    ".....brushless motors the main question is speed controller as I would need forward and reverse...." Simple answer. You can get reversible brushless ESCs. However, watch out, as boats are a minority interest and many cheap reversible brushless ESCs are designed for car use. These may have a 'braking' feature, which means that the controls work like this: forward stick = forward backward stick = motor braked quick forward and backward again = motor goes in reverse which is optimum for cars, but cumbersome for boats. A proper boat designed brushless ESC will be fine, as will be a cheap car one where you can turn off the 'brake'. RNinMunich recommends the Quicrun series of Chinese brushless ESCs, but of course products change all the time. So check that the ESC you are after is reversible, and has a 'no-brake' setting.... Rather more complex background explanation. This is my understanding of how one particular 'brushless' system works - there may well be other technologies out there... : 'Commutation' is the process of switching each coil in an electric motor on at the right time to get attracted to the nearest magnet and off when it passes the magnet, so that the armature will rotate in one direction. In a brushed motor this happens mechanically, and we don't need to worry about it. If you want to know a bit more, get a Taycol motor and start reading papers like this: http://what-when-how.com/electric-motors/commutation-electric-motors/ In a brushless motor, commutation is done by
    software
    inside the ESC. So the ESC is essential to a brushless motor - it won't run without one. What the
    software
    in a brushless ESC does is start the motor with a pre-programmed series of activations of coils. Once spinning, the
    software
    detects the generated back-emf as a magnet passes each coil, and uses this to work out the motor speed, timing, and hence which coils to activate next, depending on the throttle signal. Obviously, this happens very fast. If the motor went round slowly, the generated back-emf would be very low, and the ESC would have difficulty detecting it. So a typical brushless motor has a minimum speed which is quite high compared to a brushed motor. In a sensor motor, the ESC can be much more precise about timing because it reads it off the Hall-effect sensor. It can also run at much slower speeds. But the extra kit, and the low production levels mean that these are going to be more expensive motors. For a brushless ESC the starting process, and the reversing process, are much more complicated than they are in a brushed motor. In each case the
    software
    has to try to detect what the motor is doing and adjust the timing to get it running in the right direction 'blind', with possibly odd feedback from the coil back EMF. For a brushed motor, the ESC just reverses the polarity and the mechanical commutation automatically applies a force in the direction you want. The result is that brushless starts can be a bit jerky, and brushless reverses need 'setting up' with a process of signalling from your transmitter or using a program card. Since cheap brushless ESCs are often turned out with little documentation, making them reverse can sometimes be difficult for an inexperienced purchaser.
    3 months ago by DodgyGeezer
    Forum
    Fatal Error - Half my Profile is missing! ;-/
    I have also had that error message occasionally. Seems as if this board
    software
    is rather buggy...
    4 months ago by DodgyGeezer
    Forum
    Fatal Error - Half my Profile is missing! ;-/
    Yes Stephen, I have had similar problems with notifications in my emails. Thought it was my phone
    software
    . Cheers Colin.
    4 months ago by Colin H
    Forum
    CNC boat kits...?
    Aluminium for stables? Perhaps a slab of oak would be more appropriate? I am cutting slices off old oak fence posts for use as coasters and think I can engrave them using the 'boat motor cutter' - so long as the cut is not deep. A laser would be ideal - but the cost and the danger mean that it needs a bit of thinking about. I must look up the Rumba and mega2560. One issue I have with the Uno and GRBL is that the
    software
    does not do 'tool radius compensation'. You have to do this in your conversion, and Dfx2Gcode does not do this either. I do not know if there is a GRBL version running on the 2650 which does do this. Essentially you need a GRBL which implements G41/2 commands, or you will have to do the compensation in your original drawing. I am using sub-milimeter cutting tools for balsa, so the compensation required is negligible and can be ignored, but when cutting ply I may need to worry about it. Your TMC2130s may not need endstops, but the limit switches are also used for homing. You will find that if you want to cut lots of parts out of a single sheet of material, it helps to be able to home accurately. GRBL allows you to have a 'master machine home' and then several subsidiary homes. So, when cutting, I start with the cutter in the master home position in the top right corner, then move it to a secondary home position which is directly over the workpiece top right, then do all of my cutting in relation to that secondary home position...
    4 months ago by DodgyGeezer
    Forum
    CNC boat kits...?
    A word about the electronics and
    software
    build.... Each stepper motor is driven by a 'driver' - a little switching unit like an ESC. This does the business of sending the power to the motor coils in the right order. They are quite cheap - about Β£10 each. To tell each driver to operate the motors in the right order you need a control box running the right
    software
    . You can use a dedicated laptop for this, running a stripped down system called LinuxCNC, but I opted to use an Arduino, which was the option advised by the vendor. So here is a picture of the Arduino (at the bottom - you can't really see it) with a breakout board on top carrying the four drivers (which have the little blue heatsinks on them). I made up an aluminium box to put them in, and attached it to the cutting gantry. The Arduino runs a control program called GRBL. I take the plans I have drawn in DXF format, run them through some
    software
    called DXF2GCode, which turns them into G-Code, and then send that file to the Arduino via a USB connection using 'Universal GCode Sender'. All these items of
    software
    are open source and free to download. The Arduino gets its power from the USB connection. The stepper motors get their power from a cheap Chinese 36v power supply, and the cutting motor gets its power from an old laptop power supply I had hanging around. If electronics frightens you then you probably won't want to do this, but the skills needed to wire up a boat motor are really as much as you need to put it all together....
    5 months ago by DodgyGeezer
    Blog
    Almost there.
    The Pilot boat is nearly finished. I have been fitting the seats and deck railings. I am reasonably happy with it but I have a lot to learn, some of which will be in my conclusion in the final post. My sailing river is in Hungary so I have spent part of this weekend making the shipping boxes. I have decided on a very simple screw face to edge design as there is not a lot of weight to send. The box is heavier than the model. I have used 12mm ply wood for the construction. My local B&Q cut the board to the sizes I supplied to them. A very useful service as it takes a long time to set up my circular saw as it has no table. It only took 15 minutes to cut out the twelve pieces. i then just added the fixing holes and countersunk them to make the screws sub-flush. They look suitable for purpose. I have sorted the problem with the lack of usable switches on my Turnigy 9x. As I needed another radio to take with me, I bought a Turnigy 9xr Pro. This one has the latest er9x
    software
    which is much more user friendly, I am told.πŸ˜‰ I will upload a video of the trials over the next few weeks. Almost time to decide which of the three new and rebuild projects to tackle next. The Patrol Torpedo Boat upgrade, the Dusseldorf Fire Fighting Boat or the 46" Crash Tender.
    5 months ago by MouldBuilder
    Forum
    Locating Clubs on 'Boats Clubs and Lakes'
    I am sure that on the previous
    software
    when looking for Clubs, etc. they were in alphabetical order. They now seem to be in order of the last post against a particular Club, Lakes, etc. It was a lot easier to find Clubs before - is there any chance that this can be re-instated or the ability to sort by name or last post, etc. ? Alan
    5 months ago by ads90
    Forum
    Can't edit or add to boat in harbour
    This website certainly doesn't put any personal information of anybody on facebook. @4clubs, in the process of fixing the loading bug in the harbour, I've deleted some of your harbour photos. Sorry! Hopefully you can edit again and re-add them. Do realise, it's one man here, with a separate full-time job. There's no large team of developers. The old website had security vulnerabilities and used legacy code which had to run on older server versions. It wasn't possible to update the server until the website was overhauled and in the longer run, it would have been necessary to pay for extended server support to keep the legacy stuff going. Things cannot stay as they are. Nearly everything has been overhauled and it's taken 18 months to do so. Bugs like you mention will be ironed out, like with any
    software
    it's never perfect right out the box. My guess is that the number of photos in the post affected the loading screen. I'll do some further testing this evening on that. Thanks Stephen
    5 months ago by Fireboat


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