Returning to build my first HW

[Bodge Job]

ahh brilliant thanks, looks like the weapon I have in mind is plausible then. Lower end, but hopefully that means it won't wreck itself (I thought I replied to this ages ago, but apparently haven't).

I had wanted to purchase one of those MY1020 24v motors before I started anything else, but annoyingly they seem to be out of stock everywhere at the moment (something to do with rw coming up maybe?) . So was wondering if anyone could tell me what the shaft is like, and if it could be plausibly replaced with a longer one? Also, was hoping to mount them via the front plate, rather than the stand, would the motor be up to this without major modifications?
Secondly I’m trying to source 20mm aluminium plate, had found some cheap on ebay but the listing finished, so currently looking at http://www.aluminiumwarehouse.co.uk/...f67dl30ja91cu1 but was wondering if anyone knew of anywhere cheaper? Or is that the kind of prices I should be expecting?
Thanks

[maddox10]

https://www.aliexpress.com/wholesale...28&needQuery=y

[typhoon_driver]

Previously ordered ali from those guys. I thought it was reasonable. Just bear in mind the tolerance they give as the pieces will likely be plus 2mm as mine were.

[Bodge Job]

Ahh brilliant thanks, now ordered the main construction materials, and will be ringing up a few water jet companies about the hardox weapon in a few weeks time.

And thanks Maddox10 but that site doesn't seem to have the 24v 800w version either, every where i've looked still has the 36/48v 800w motors (and the odd 1000w) but all the 24v 800w motors all say out of stock, or have been removed. I had wanted to run the 24v motor on a 8s lipo (so mild over volting) using a ragebridge. But the 36v motor is at the limits of the controller voltage so could only be run on a 9s, so will be slightly undervolted.which is why I wanted to avoid using those if could.
or am i being a bit thick, I had presumed the were the same armature with slightly different windings inside. But are they actually the same instead, and just mislabeled? with the the 24v version being just an undervolted 800w 36v motor, so would actually be a lower power (500w motor)? or was I correct in thinking it was wound differently?

[maddox10]

The windings could be different in wirethickness and turns per loop, but using the same armature/rotor.

Now the simple math. A 36V 800W nominal motor will draw around 25A when operating at good efficiency. Providing the same motor with 24V , it will become a 400W motor for the same efficiency.

But this could be an option.
https://www.aliexpress.com/item/24V3...4-d73b1595e964

[Bodge Job]

Ahh OK, yeah I didn't take into account efficency for my quick power sum so that would be quiet low! And right Yeah they look good, might have to use them if the 800w ones don't turn up (although would definitely struggle for power). Or have to run the 36v on a 9s. Both not desirable, might run in that config over the summer, and buy more powerful motors if I get a spot on the next robot wars. I hope to make the Grantham and Colchester events this summer, although unlikely to have it running by Grantham, (so might just go there with a feather) and if it was running I couldn't run the there weapon any way at robots live