I have added a long thin heatsink across the four chips and the X-soak test ran perfectly.
100 x X movements with no drop out. This is first for me.
The heatsink was still getting up to 70 ° C which is still too hot for my liking.
Next step is to reduce the current ratings to reduce the heat on the chips.
See Current settings for X,Y and Z for the motor settings I have calculated for my rig.
I will be looking to add a small fan on the heat sink but I don’t want the fan to run all the time.
I want it to either run when there motors are active or in the temperature exceeds 40 ° C.
Any one with any ideas for ‘taps’ I can connect to, to drive the fans when FB is running the motors?
This means I can now turn my attention to the soak testing of head load / unload (that was failing because of the X axis failing)
Here is a photo of the heatsink installed
