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Assembly begins (Patreon)

Published:
2021-08-25 21:35:34
Imported:
2026-06
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Content

That's twelve 9225 90 KV motors all in their mounts and all with the centre pin chopped off.

I'm using PLA housings on these, but I'm hoping to run each axis on around 10-15 Amps instead of 30 this time, so hopefully the motors won't get so hot standing still they melt the plastic!

Files

Previews only

Comments

Karl Machen

Working late on this build? I'm most excited for this iteration!

Cody Blotske

Curious why you don't use PETG for stuff that directly connected to the motors.

XRobots
>>66509799

I really want to make the whole thing out of PLA because anyone can print it. If that works then the parts can be upgraded if needed. I could do it all in Polycarbonate, but it's not accessible to everyone.

Anonymous

How expensive / easy is this motor to source?

XRobots
>>66511107

Much cheaper than the ones from Hobbyking. I got them for $53 each from Aliexpress. Look for Eaglepower LA8308 90 KV. That said, obviously I haven't used them for long periods yet so we'll see how they work out.

Anonymous

this is for OpenDog, correct?

Cody Blotske
>>66509799

That makes sense with having a channel. I've recently moved nearly everything to PETG. Its printing pretty easily. In the past it was a pain but really smooth a few years later. Not sure what changed

XRobots
>>66509799

I haven't tried it for a while either, I guess it's down to the material science!

Shadow

If high temperature is an issue, why not switch the filament for higher temperature operation? Like ASA filament?

XRobots
>>66539809

I really want to make the whole thing out of PLA because anyone can print it. If that works then the parts can be upgraded if needed. I could do it all in Polycarbonate, but it's not accessible to everyone.

Anonymous

Maybe there's a way to put some aluminum foil tape on the areas that heat up in an effort to reflect some of the heat away from the PLA parts? Great progress, really interested to see it all come together!

XRobots
>>66552035

The bolts holding them on got really hot in openDog2. Ultimately I want to use less power so I'm not pushing the motors to their max - they should be air cooled by the rotors of a drone for that rating too which are of course missing ;-)