LaserUser.com Forum (formerly RDWorksLab)

I rescued a 60x90 laser from a warehouse.
It had been sitting outside for several years . The Leetro controller panel, MPC6515, was damaged and dated so I replacéd it with a RDC6445G.
Problem is the z axis. I could jog it using the Leetro bit not with the Ruida . The motors make a squealing noise. The port works on the x and y when swapped. The stepper driver is a Syntron SH-20403.
Wiring appears to be correct. Am I missing something? A setting somewhere? Should I just replace the driver with a "standard" type ?
Thanks

If the motors worked before and make a noise now, it is almost certainly a wiring problem... I often notice what I did wrong on the third time checking it- our minds tend to see what we expect to see as opposed to what is actually there I have found.

If the motors worked before and make a noise now, it is almost certainly a wiring problem... I often notice what I did wrong on the third time checking it- our minds tend to see what we expect to see as opposed to what is actually there I have found.

Hi David,

i swapped the Leetro for a RDC6445GT5 and had also "noise without movement" on my Z while X, Y and U moved out of the box (but with wrong scaling).
If it is not a wiring problem, check your step-length, speed and acceleration on Z.
Backup your current parameters and start with very (very) low values like speed of 1mm/s (or even lower) and acceleration of 10mm/s.
Then it should move.
Calibrate the step-length. (maybe you want to increase the speed to a more "friendly/faster" value if it is annoyingly slow)
Keen in mind, that the speed depends on the step-length. If you change the step-length, the speed changes also.
If the step-length is calibrated, then de/increase the speed to a point where is is working reliable and not loosing steps.
After that you can crank up the acceleration up to where it is quick but not sounds horrible.
For Z acc is not critical to be as agile as X.

Hope this helps you set up you Z correctly.

Thanks for the help. It was a wirting problem, loose terminal. After correct that i installed the motors back into the unit. Got strange but different noise. Adjusted steps to a lower number and it works.