[Dreco]

Hello All,

I built my own machine CNC router which has been running perfectly for 2 months until my Z axis started playing up.

im running Masso as the controller and Nema 34 Closed steppers.

the Issue is with either the motor or the stepper driver (the error is that its losing steps).

This occurs spasmodically sometimes on homing or halfway though the job.

I have checked and the cabling joins are all fine.

has anyone had this issue or if you have any troubleshooting ideas I will be glad to hear them.

https://www.omc-stepperonline.com/download/CL86T.pdf

its is the 3rd error in section 2.4

https://www.omc-stepperonline.com/cl...l?search=cl86t

https://www.omc-stepperonline.com/cl...5BNema%2034%5D

[Kfed]

Hello All,

I built my own machine CNC router which has been running perfectly for 2 months until my Z axis started playing up.

im running Masso as the controller and Nema 34 Closed steppers.

the Issue is with either the motor or the stepper driver (the error is that its losing steps).

This occurs spasmodically sometimes on homing or halfway though the job.

I have checked and the cabling joins are all fine.

has anyone had this issue or if you have any troubleshooting ideas I will be glad to hear them.

https://www.omc-stepperonline.com/download/CL86T.pdf

its is the 3rd error in section 2.4

https://www.omc-stepperonline.com/cl...l?search=cl86t

https://www.omc-stepperonline.com/cl...5BNema%2034%5D

I have the same exact motor and driver. I am having an issue where the motor/drive will not respond to the direction signal spasmodically. Suddenly if the axis is supposed to travel in the - direction it will travel in the + direction. If I move the driver to another axis, the problem follows the driver so it does not apear to be the signal coming from my controller Centroid Acorn. This has happened on 2 drives so far, so I have lost confidence in these things. I am in the stage of finishing my machine and doing some calibration and test cuts, so these drives do not have any real use.

Did you ever resolve your issue? Anyone else having problems with stepper online closed loop stepper setups?

At this point, I feel like I need to consider some alternative, since 2 problems out of 4 drivers is not really giving me much confidence.

Kirst

[Toinvd]

What kind of breakout board do you use, are you sure the input to the direction is good enough.

[Kfed]

What kind of breakout board do you use, are you sure the input to the direction is good enough.

I am using a centroid acorn with 24v for the signals. If I swap the faulty drive to a different axis, the issue follows the drive to the new axis which leads me to believe that the problem is with the drive and not the input signal.

[Cahark]

I am using a centroid acorn with 24v for the signals. If I swap the faulty drive to a different axis, the issue follows the drive to the new axis which leads me to believe that the problem is with the drive and not the input signal.

I am currently having this exact same problem, with the exact same components. I have a replacement driver on the way, and I will update when I have more information.

Have you made any headway since your last post?

[Toinvd]

This might be due to the input of the driver which consist of a opto coupler.
The resistor internal is perhaps calculated for 5 volts which means that working on 24 volts input signal, the LED in the opto coupler get's a bit to much leading it to fail after some ( long ) time.
When you replace the driver you could add a resistor in series to the signal for step, dir and enable. go for something like 3K3

[Kfed]

Cahark:

Glad to hear that it is working for you now. I have been using my system quite a bit now, running some very long programs and have not had any issues at all. I just used the 5V from the Acorn power supply, no resistors, and still using the screw terminals.

Dazp1976. In hind sight the DB25 connector would have been the better option. Stepperonline has a closed loop drive CL86Y that can take 24V, and Acorn has a schematic for that drive using the 24V on the screw terminals, so it is pretty easy to fall into that trap.

Kfed

[Cahark]

Cahark:

Glad to hear that it is working for you now. I have been using my system quite a bit now, running some very long programs and have not had any issues at all. I just used the 5V from the Acorn power supply, no resistors, and still using the screw terminals.

Kfed

I did try this method with no luck, but now I believe it was due to the drives having already been damaged when I gave it a shot. I'm glad it is working for you now, and I will keep this option in mind for the future.

[Pugman1]

Hi. I am using a CL86T looped stepper driver and motor. I am using a 24vdc for the drivers and a different power supply for the motors. I am getting problems with the motor not always wanting to move smaller distances like .5mm etc. is this because I am not using resistors on the dir/pus connections. If so do I need to connect in 2 ohm resistors to sort the problem. Thanks.