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General Mach Discussion / Low voltage on stepper port issues

« on: March 24, 2018, 09:04:12 AM »

Hello,

I have some issues with a CnC machine.

The Z axis doesn't work at all.
When measuring the current going through the pins and comparing it to the other axis then the step pin has a permanent 0.21v and thus doesn't work.
I've swapped the cables from the other axis to this one and vice versa and could conclude that there is no issues with the motors and cables.

Measuring the cable it itself gives of 5v (Which all the other cables also does), but as soon as it is put in the step slot on the card it drops down to 0.21v.
No matter how much I try to move it in the mach3 software it doesn't work. It changes position in the mach3 program but refuses to work.

If I remove the cable from the card and then just touch it to the slot where it is supposed to be it does small jumps at first contact, as if the 5v tries to make it move, but then straight away drops down to 0.21v.

Does anyone have any idea how to further troubleshoot this?
Or is it possible to change the voltage at the step port from mach3 itself?

I've tried to start it from a clean profile, but also using the one provided as the software and machine were purchased.

I'm attaching the image of the card as well as the xml.

If you have any idea on how to fix it, or to further troubleshoot to figure out what it is then please tell me!
If you need any additional information, then please tell me asap and I'll provide it as fast as i can!



Regards
/Jerry

EDIT: I might have double posted a bit here as it didn't seem to accept it.

2

General Mach Discussion / Stepper issues

« on: September 23, 2016, 02:01:52 PM »

Hello,

I'm helping out a friend of mine to try to figure out what is wrong with his CNC machine.

It worked perfectly on a very old outdated machine and we decided that he should  upgrade to a faster machine in which he could do some CAD work to then use the CNC.

But we ran in to a issue straight away. At the diagnostics page we can't see any reaction on the ports. And if i recall correctly then there should always be a signal on at least one port.
And when we press keys nothing happens in the diagnostics or with the motors.

Then i downloaded a program that let us send signals through the COM port and to the machine straight away. To start the spindle works perfectly but when I try to send a signal to make the motors move they just do a small jump (Not enough to move anything but they make a sound that they activate then stop right away)

We can see currents moving through the board (Measured up)

The pc is a windows 10 machine with a add on com port in a PCI slot.
The old pc were a windows XP with a integrated COM port.


Has anyone experienced anything like this before?
Do you have any idea on what it could be?
Do you have any suggestions or things we could try? (We are both new to CNC)

Do you need more information regarding this? Then please do tell and we will provide with anything you require to further help us out !

Looking forward for someone that could help us out.
/Jerry