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  1. Replies
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    I'd avoid the 25D gearboxes. They have a tendency...

    I'd avoid the 25D gearboxes. They have a tendency to twist which then jams up the spur gears. The various 22mm gearboxes, including Gus's OPBoxes are much more robust.
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    A nice picture of the setup would help people...

    A nice picture of the setup would help people diagnose the problem easier.
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    What thicknesses of what metals do you keep in...

    What thicknesses of what metals do you keep in stock?
    I've got a large steel (6mm) Aluminium (3mm, 15mm and 25mm) copper (2mm) order to go in. Also the 3mm Aluminium will need bending.
  4. FRA rules doesn't have a motor limit, I think the...

    FRA rules doesn't have a motor limit, I think the German Raptor class does tho.

    CHASTA at Insomnia 2017 ran 2x C80100 7kW motors.
  5. Gottit. Should be there with Deadlock and RamJam.

    Gottit. Should be there with Deadlock and RamJam.
  6. Thread: Help needed

    by Pinski1
    Replies
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    There's a few hackerspaces around you. I'm at...

    There's a few hackerspaces around you. I'm at Cambridge Makespace and I build combat robots, got 2 feathers, 1 and a bit beetles and a mock up of a heavyweight. Hitchin Hackspace has the heavyweight...
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    Honestly, don't machine all the way though, like...

    Honestly, don't machine all the way though, like proper iso-grid and you'll save the pain of the Ti. Or even use duct tape instead of the Ti if it's purely for stopping debris.
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    I got the 2mm Ti for Bourbon water-jet at K-Cut,...

    I got the 2mm Ti for Bourbon water-jet at K-Cut, I had to buy the sheet from eBay, then send it to them.
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    Those webs are far too thin to be of any use I...

    Those webs are far too thin to be of any use I think, and they'll be a git to machine nicely. And 1mm Ti just isn't quite strong enough.

    Personally I'd make the wheels the same size, and while the...
  10. Thread: Devo: 7 vs 7e

    by Pinski1
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    I've been using a Devo 7e for quite a while now....

    I've been using a Devo 7e for quite a while now. Highly recommended.
  11. Thread: BOB FW Series

    by Pinski1
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    17,051

    The other advantage is that as it warms up the...

    The other advantage is that as it warms up the metal bullets much much faster the plastic doesn't get time to properly melt.
  12. Thread: BOB FW Series

    by Pinski1
    Replies
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    17,051

    I've got to say, they all look like dry joints to...

    I've got to say, they all look like dry joints to me, no smooth fillets of solder between the wire and connector solder cups.

    You've probably got one of those budget Maplin "30W" soldering irons....
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    I'm glad you liked the hex drum. And I'm very...

    I'm glad you liked the hex drum. And I'm very pleased I didn't damage your gorgeous bot too much in our first round fight!
  14. That sounds like a bad idea. Usually with high...

    That sounds like a bad idea. Usually with high speed signals you want everything nice and close, not wrapped around all the noise sources you get in a robot.
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    This question comes up pretty regularly, try...

    This question comes up pretty regularly, try looking at everyone's build diaries. Or using the search.
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    Having looked at Hardox tubing for Deadlock the...

    Having looked at Hardox tubing for Deadlock the minimum order was like a kilometer or two.
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    imgur.com is damn good for images. Also Google...

    imgur.com is damn good for images. Also Google Photos.
  18. I've used Lasermaster ...

    I've used Lasermaster quite reasonably in the past.
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    For deadlock we've used: https://k-cut.co.uk/...

    For deadlock we've used:
    https://k-cut.co.uk/
    http://www.daysteel.co.uk/
    https://www.lasermaster.co.uk/
  20. Lets see it working before you try and value...

    Lets see it working before you try and value engineer it. At this point you've not produced anything and are already inspecting the eggs for blemishes.
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    It'd really really help if you posted a picture...

    It'd really really help if you posted a picture that showed how you have it wired up.
  22. I mean: ESC +5V (+diode drop) -> diode ->...

    I mean: ESC +5V (+diode drop) -> diode -> external +5V. As found on some VESCs and Ragebridges.
  23. OPTO, but integrated diode on the output works...

    OPTO, but integrated diode on the output works quite well too.
  24. There's a couple of us trying to build 300A ESCs...

    There's a couple of us trying to build 300A ESCs now.

    Personally I'm not a fan of directFETs, can't inspect joints, package is unique to Infineon and they seem to discontinue them quickly. HSOF...
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    For our Heavyweight I'm using 2mm copper bus...

    For our Heavyweight I'm using 2mm copper bus bars, 8AWG on power busses (batteries to link, link to fuse, fuse to ESC and ESC to return) and 10AWG on esc to motor (we use brushless so each wire is...
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