#Motor Too Hot In Latest RatOS Update??

48 messages · Page 1 of 1 (latest)

unborn pewter
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In the latest ratos-udpates, which (thank you) fixes the library issue with SciCharts, it seems like some default values were changed for how fast things operate potentially. Has anyone noticed this? Everything is moving much much faster in the X and Y and sometimes Z directions. I tried to change the values under Machine for Velocity and Acceleration, but they don't stick. Now I've gotten this alert twice to popup (in the attached screenshot). Anyone have any ideas / advice?

I'd also add that the motors are louder when the machine is idle. I can't say I recall hearing them much before (can't be sure though), but they are definitely louder now

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manic egretBOT
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unborn pewter
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Motor Too Hot In Latest RatOS Update??

marsh flume
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thats not the motor too hot, thats the driver too hot. Do you have them actively cooled?

unborn pewter
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Ahhhh. Actively cooled as in something other than the stock setup ? I have the fan in the electronics box and I can see it's running at 100% The temperatur of the octopus board doesnt look any different as well. but with certainty, everything is moving much faster when the motors engage.

marsh flume
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that fan is pointed at the octopus, correct?

unborn pewter
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i will doble check. though I was a little confused by whether the fan should eb over the rasberry pi or the octopus board. It shoudl be over the ocotpus board though? They are both under 30 c though, which seems reasonable.

marsh flume
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the octopus where the motor drivers are, yes

unborn pewter
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Thank you. Im repositioning now, you think this will resolve the driver temp warning?

tough spire
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in your printer.cfg what currents are you running and what stepper drivers do you have ? the TMC2209;s ? do they have their heat sinks on ?

unborn pewter
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No changes in printer.cfg from what I assume are the defaults of 24V. All stepper drivers have heat sinks on. I did not see this issue until the latest ratos-update on Sunday that fixed the SciCharts problem though. And like I was saying, it seems like something is different as the motors are running a ton faster.
I tried to copy in all the lines from printer.cfg that were relevant to the steppers but it was over a 2k character limit I guess. I will go back and do a diff between current version and one from before Sunday when update came in.

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Thanks for this help, @tough spire , appreciate it. So I checked back in older versions of printer.cfg I can see no differences. However, examining RatOS.cfg does contain differences. New versions of the file, for each stepper driver entry look like this:[tmc2209 stepper_x] stealthchop_threshold: 0 interpolate: False uart_pin: PC4 run_current: 1.6 driver_TBL: 2 driver_TOFF: 3 driver_HEND: 0 driver_HSTRT: 6 sense_resistor: 0.11
older versions looked like this:[tmc2209 stepper_x] stealthchop_threshold: 0 interpolate: False uart_pin: PC4 run_current: 1.1 driver_TBL: 1 driver_TOFF: 3 driver_HEND: 0 driver_HSTRT: 0 sense_resistor: 0.11
It seems like the new version of ratos has changed the value for run_current from 1.1 to 1.6. I think I get that change but the change for driver_HSTRT I don't get.
Do you think this change is OK or shoudl I go back to the lower current?

tough spire
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looks like you picked the performance profile - 1.6A ... I've run my v-core-pro @ 1.5A for years never had an issue ... recently installed RatOS and noticed the slight bump. 1.6A is 80% of the RMS max so should be absolutely safe but it will need active cooling (as in a fan directing air over them ... I'd say you want to make sure the fan is positioned to blow onto rather than suck away from.

marsh flume
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if you weren't running performance (standard) mode before, this is a good change. The non-performance mode is for commissioning, so everything moves slow while you get stuff set up. In case something goes wrong, not as much speed or power is going to things so less chance for things to break and more time for you to hit the estop.

unborn pewter
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Ok, I understand. Part of the comissioning doc I was just on does have it go to performance mode so this would all seem to be good. I'll confirm the direction of the fan too. Thank you guys for the insight, much appreciated.

junior elm
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I had this on mine and it was the z0 motor but none of the others all are actively cooled ,so I lowered the run current to 1.2 and all seem to be fine

bitter yarrow
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ah, yeah I am now getting the exact same issue

image.png
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gonna try 1.2 and see if that fixes it for me too

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although it kinda flickers in and out, imma first check that with a thermal cam I have a feeling there is something fishy with the reporting in the new ratos

bitter yarrow
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yup it is actually overhating

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1.2a it shall be

tough spire
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Hmmm ... interesting ... I've not been seeing this but probably not running my printer long enough to see it at the moment ... I did think I was running mine at 1.5 in my old pre ratos setup but it turns out I was running 1.3 for x and y and 1.0,1.3,1.0 for my Z (Back one got more current) and I had a lower hold_current set but that is no longer the done thing it seems. So far been running 1.6 on all mine with no issues but only really been printing calibration stuff so up to 45 mins at a time. I do have a 120mm fan mounted just above my control board though.

bitter yarrow
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I'm unsure if it's my room being 32c or something is going on, but I have not noticed it before

tough spire
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Strange it is the Z motors rather than the X/Y. I was about to say ambient temp is also probably a factor

bitter yarrow
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and it's Z1 only

tough spire
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Also worth noting I have a V-Core-Pro, and my control board is mounted on the back with no real box. Though it is under a plastic tarp that I use as an "enclosure"

bitter yarrow
tough spire
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I'm not sure that this is a RatOS thing ... that flag comes direct from the chip, Klipper is just reporting it

bitter yarrow
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hm

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like I said it is actually overheating [70c on the part outside trhe heatsink]

tough spire
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how are you getting temps ?

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are you using 2209's?

bitter yarrow
bitter yarrow
tough spire
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70 degrees should be no where near the OTPW

bitter yarrow
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yeah I read into it now

tough spire
bitter yarrow
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hm

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then that is strange

tough spire
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I suppose 70 degrees at the outside of the heatsink could very well indicate 120 at the die

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in theory you don't actually need to be printing just have the steppers enabled ... I'm pretty sure I've had mine enabled after a home for as long as the default timout is

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I'll be keeping an eye out. Given the Z doesn't really move that fast dropping it down to 1.2 or similar shouldn't be an issue but it really is strange that it is not also triggering on any of the 4 others, unless you have a suspect 2209 board

bitter yarrow
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it killed the mcu??

image.png
bitter yarrow
bitter yarrow
tough spire
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as in some component is faulty or out of spec. which make of tmc2209 do you have ?