hi i have a labvolt 5600 cnc machine
initial issue was when jogging z there was no movement at all...dead
prior to this the z axis motor and z axis worjked fine no issues
i have done extensive troubleshooting and after several swapping and proving out...i have come to the conclusion that its a bad z chopper drive board
there are 2 critical componenets on the chopper drive board L297 and L298 chips and i was told that the 1 or both of these could be the problem so i ordered both
as a start today i installed the L298 chip which is basically supplies power to the motor...i did not install the L297
well good news bad news...replaced the L298 chip on the labvolt
chopper drive and now it seems i have power to the z motor ..when i
jog up or down the motor is trying to turn however its grinding and
sounds like both directions fighting each other at same time? and not moving much at all....but the motor is attempting to move on command
if i take the x cable and plug into the fixed z board now the x motor
sounds like **** and wont move like its locked up...and if i put x
back to normal it runs fine
so it seems something else is going on although i do have power to the
z mortor now and i didnt have power before...it was dead when trying
to jog
any ideas? defective new chip? or maybe l297 part of issue?
the z axis is fine not bound up..can move easily by hand when machine off and just moving belt by hand...up and down....