V-core3 overheats after homing in 2 minutes and shuts down
Hey everyone. I just finished my V-core3 and yeah the above mentioned problem occurs(see Screnshot attached for the fault). I noticed, that the drivers were getting really really hot quickly just when the printer is homed and sitting there, no active movement. I swapped the three z-axis drivers for the ones I had in my v-minion and the problem was fixed. The drivers are both 2209s but the ones that shipped with the vcore3 where v1.3 while the ones from the v-minion where v1.2(see pictures). Does anyone know what is causing the problem here? Sense resistor is the same on both and they are both 2209 drivers from BTT.
Thanks a lot for your input!
6 Replies
Do you have a fan on the driver's?
rare-sapphire•2y ago
not yet but that can´t be the problem. The v1.2 2209s run clearly a lot cooler when the motor power is turned on.
which motor cfg file are you running? if over 1.5A YOU MUST USE ACTIVE COOLING (A FAN)
rare-sapphire•2y ago
atm since I donß´
have a fan on I´m using the basic config with 1.1A
so I think I solved the problem with the overheating drivers. In the config the stealthcop_threashold is set to 1. When changing it to 0 as klipper suggests it is fine and I can print without overheating.
I'm having a rough time believing that is the only issue. My machine will sit sometimes for hours 'on' and all my [tmcxxx extruder] sections have stealthchop_thresholds set to 1 without any overheating problems. Yes, fans on the drivers, but temps never get above 32°C
The 1, will switch to t he lower power mode on timeout
rare-sapphire•2y ago
I agree with you 100% but that´s just what I´ve expierienced. Idk I´m not deep enough into micro electronics to tell the differences between v1.2 and v1.3. Nonetheless if it´s a 2209 stepper driver they should work the same regardless it´s revision number. Tomorrow my 120mm fan arrives and I´ve already gone into Solidworks to design some arm in order to hold the fan in place above the drivers. Also I´ve ordered some bigger heatsinks for the driver. After those changes I will be fine running performance mode on it.