Z-axis motors always warm to the touch, even when printer has been idle for days
I've upgraded two MK3S printers to MK3.9 and on both of these, when you feel the Z-axis motors they are always warm to the touch. It does not matter how long the printer has been idle, if the power switch is on, the motors are warm, never too hot to touch though. This is not the case for the X-axis and Y-axis motors, they are always cool to the touch when the printers have been idle.
Any ideas what's causing this? Makes me wonder about longevity, not to mention the needless waste of power.
RE: Z-axis motors always warm to the touch, even when printer has been idle for days
The Z axis is affected by gravity and human intervention,
Unlike the X and Y axis, the Z axis does not re level / re position every time you turn it on, so Prusa intentionally apply a 'holding' signal, on the Z motors when the printer is powered but at rest, the holding signal, is, I believe lower power than the running signal and the intention, is to limit the liklihood of z axis droop, when the printer is turned on. Think Cold pulls, and clearing nozzles
This has been the case on Mk0, Mk1, Mk2 and Mk3 and I Suspect Mk4 and XL (Probably especially the XL, because that is a vertically moving heatbed which the user applies the build plate to, and removes models from during use, which is probably more likely than the other printers)
so what I am trying to say, is... it's normal for the Z motors to be warm, when powered on
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK