Help please. Dip switches and mach 3 settings

[john swift]

I can not see any thing wrong with how the stepper driver is set up

with stepper motors the motor current depends on what you set by the DIP switches - sw1 to sw3
not the mechanical load on the motor
so the current does not go up when you mechanically load the motor as you may of expected

depending on which manufactures data sheet you look at
the motor can safely run at 70 to 80 degrees C - too hot to touch !

a quick look on line did not find clear instructions for the setting of sw4
but going by a photo of your DQ860MA driver
I expect sw4 sets the current reduction when the switch is set to OFF and the motor is idle ( not being stepped )

set to ON the motor will run hotter but should be OK

setting the motor current to 4.9A instead of 5.6A will do two things
1) reduce the motors temperature
2) reduce the motor torque

if the room temperature is not too high
then I expect you can safely set the motor current to 5.7A
the extra 1.7% current should not be a problem
especially with sw4 OFF


John