Retrofitting a CharlyRobot 3 axis CNC

The l297 chip is only the driver chip for a h-bridge and needs those 5000.
But what is used a h-bridge. Can you see the chip? The h-bridge decides the current, means decides the force of the motors. Do they get warm?

I see 4A on the motor and that was difficult to get in chips on those days.

With the power off:
-Check plugs and wires going to motors for damage,
-Check drives if they are properly seated in their places,
-Leave the machine ON for 15 minutes, check by hand if the motors are getting warm, they should
After checking that, with the power OFF, replace the Y and X motor plugs, turn on and test.

Mike_Eitel wrote: The l297 chip is only the driver chip for a h-bridge and needs those 5000.
But what is used a h-bridge. Can you see the chip? The h-bridge decides the current, means decides the force of the motors. Do they get warm?

I see 4A on the motor and that was difficult to get in chips on those days.

L297 is used with an L298 and that is a 2A part, but it can be used in parallel, one chip using both outputs to power 1 winding and another chip for the second winding. Might be that why the motor is 4A, then again it might not be.....

Yes, in theory this is possible, also i never saw that.
Next question is if there is some current reduction on, remember that this exists, also switched by a signal.
If i understand correct this same electronc has already controlled the mill corecttly before. So must be capable to drive the motors....

I saw and i did that, also written on the spec sheet for the L298 and some other driver IC's.
That is also my understanding, but looks like some messed wires are there, so who knows ....

Have alook around pin 17. There is text that point towards current reduction.
Make some photos of such a driver card. I'm quite sure you run the drivers in "paused" modus means if they not run the get less current to stay cooler. Also i saw that isel have sometimes a break functionality for the z axis...