[naik.shenzhen]

I benefit a lot from your posts. Thanks a lot.
I am new to the CNC router world and am learning from all possible aspects. Welcome to communicate with me: [email protected]

[vladoportos]

Hello,

I have also experiencing issues with my Chinese 6040, the X and Y axis makes such a terrible noise, that it can't be ok... also I have tried setup "step per unit" with mach 3 but it never give correct results. It is setup according the manual ( I mean the motor values ), but when I tell it to move 10mm it move 7mm, than when it adjust the motor setting I asked to move 20mm and it moved 11mm and so on... I needed so much to cut some parts and now its two weeks and it still didn't cut anything here is a video what I'm talking about:

[MarcusWolschon]

Are the motor couplers tightened down?

[vladoportos]

Yes they are, I made sure of it, to me it looks like that inside the motor is "slipping"

[RussellK]

That looks to be one of the newer Carving-CNC machines (black control box) which should be running a lot better than that.

My guess is maybe the power supply is faulty and not putting out clean DC. Do you have access to an oscilloscope?

The other thing to try is running the steppers with the couplers removed - if they spin roughly it's definitely a stepper controller or power supply issue, most likely the latter as it's unlikely all 3 stepper controllers would be faulty.

[vladoportos]

Sadly no oscilloscope around but I managed to rule out frame, either all 3 motors are busted or the control box is... see video, last motor in video is Z axis motor switched to Y axis power/control and it do the same...

[RussellK]

One option would be to substitute a different DC supply - maybe even use a 12v battery. What model machine do you have?

[ktchk]

I watch the video, it sounds like when I was setting up my yoocnc machine.
I am using Linuxcnc and the stepconf is helping me to set up the controller of yoocnc. I have two of them one is using the 9855 one is using 6560.
Both of them have the same problem when the signal of the breakout broad is reversed, the motor will go wild like your video. under linuxcnc stepconf the signal can be set to positive going or negative going mach 3 have the same function, but I can not tell where is it.
Give it a try to use the different pulse edge.
Regards