The stepper motor max current is set (in the default firmware) to keep the motors under about 50C at steady state. That assumes some ambient temperature and should leave some room before the PLA gets squishy at something like 65C.
Some solutions from easiest to hardest:
You can drop your motor current a bit. Even 50mA makes a big difference.
You could reprint those parts in PETG.
You could attach a fan. I haven’t seen one on the LR3 yet.
Thanks again Jeff. Was still reading the forums to work it out. I’ll take another look in the morning. Still trying to learn on the fly. Ill go through the commands and see what its currently set at.
so I set using command M906 X850 Y850 Z850 (when i checked it was set at 900)
Havn`t tested under load yet but run some air cuts and left sit at idle for about 30 minutes.
So far seems they not heating up (i can keep my hand on there now atleast)
Ill keep monitoring temps and let you know the outcome.
That does not seem right. If you are using a SKR it drops the heat at idle.
I would assume you are at 700 and that might still be hot. Run an air cut for 45 minutes to see where you are at. A drop of 50 is not going to be that drastic.
ahh ok good to hear. Everything seems to run fine. Everything moves and cuts fine.
I thought maybe the ambient temp may have added to the heat build-up. However, It’s early morning now, and it’s quite cool inside the shed.
Any advise and how-to accomplish this would be awesome. I`m extremely new to all of this.
That is what I expected. Drop to 600, keep dropping until it stays around 50C. I did all this for our steppers, you are using different ones so you need to figure out what they need.
If you do not want to melt your parts, start at 300 and only increase it by 25 every 20 -30 minutes until you hit 50C.