Archived: the OG noob question thread! 😀

[fessyfoo]

@mikEEE

ok do i kneed to go back in firmware to set the cut off at 140c specifically 3.xx whatever that means

Jeffrey Michael Friesen mentioned this as being the default for 2.05 with silver motors as they run hotter (inevitably from the sounds of it)

Jeff is a smart guy. I kinda wonder what jeff of today thinks of that post.

The 120c limit is compiled into vesc firmware limits. you don’t have to downgrade firmware to get the higher limit. there’s a no limits version of the firmware that none of us wants to advice you to touch.

In Jeff’s post he seems to be suggesting that the raptor hubs can somehow handle up to 110c. and is using the 85c - 140c start/end hack to get it to run in that range.

I do not want to be the one to advise you how to run your hubs hot. I don’t think any of us do. The risk you’re wanting to absorb are better suited to someone understanding them better and not following random advice from the internet.

I will say I admire your persistence.

I know you want to try the 85c - 140c hack. but maybe give up on that idea, and try to find some settings that work for you. In particular expect to use less power. power == heat.

@mikEEE

chaned my raptor 2 cut off to 70c to 120c with a 40% curve and it shill throtles so much after about 3km

when you say 40% curve? you’re saying you set “acceleration temperature decrease” to 40% ? or what?

If it was that setting. it’s designed to lower the temperature for start/end on acceleration relative to braking (IIUC). The default is 15% I would set it back to that and try again.

I’m not advising this:

but if I was hacking at it myself, risking myself for the learn, I might try 85-120c, then 90-120c then 95-120c I’d avoid 100c+ for start. I might also play with “acceleration temperature decrease” setting it to 0%. I would get some kind of telemetry so I knew what temperature my motors were getting on the ride. I would get a controlled test going with the same ride each time. I would learn how the change in settings affects my ride. and what’s a useful compromise to get it to run in the temperature range I wanted and warn me when it’s too hot and get off.

after all that I’d probably take my regular motor currents and lower them. and ride the thing slower with less power so I never hit the throttling but I’m basically throttled all the time because my motors can’t deliver that power without getting to hot so they just can’t actually do it.

… I’m gonna try not to keep answering now. :). good luck.