Advanced Search

The photos you originally posted appear to be Servo Dynamics/Baldor LD series servo drives. Since they are analog ,they are easy to diagnose.

the fuses are fine we think its something giving too much current since the transformer for the drive boards was smoking when we tried to run it. Ive been trying to figure out if its worth fixing or just finding a replacement that we know works. I know there are a variety of drive boards for small stepper and servos on the small scale but its been hard to find stores that have boards for this size of motor, maybe im just looking the wrong places tho

Currently unused

The part number was in my first post = 74CBT16211CDGGR

Hi

Im based in switzerland and could give it a shot with repair by replacing U3, if i know what chip it is

Hi
I have the 400w version, should be the same. I'll post my comfig as soon as I have access, but it rather looks like an issue of drive side configuration.

-does the manual jog according to the manual work?

-can you readout any error codes? For example when toggling the arrow buttons on the drive

-did you do configure the drive with their software over usb? I did PID tuning there and also had first time power on the motors through this.

-there are some digital inputs that default to overtravel/undertravel with active low according to the manual page 212, make sure these are connected properly or disabled

Again, not steppers, those are permanent magnet brushed or brushless servo motors.
I would not change the drives and motors, that would introduce mechanical issues that might be easy to fix if you have access to a mill.
I would also not change any automation and e-stop wiring, just wire in the required stuff to Mesa and LinuxCNC.
-
Transformers do not blow, usually they just burn in place with some smoke and a distinct smell, but if left like this longer they do blow violently if any wire brakes....makes me ask: Where are the fuses? GFI?

the transformer for the drives is broken, and replacements are old we got one to try and fix it but it blew again so im looking at replacing as much of the old stuff as possible. Im keeping the motors im just not sure where to find new modern drives for steppers this big. I guess what im looking for is would it be easier to find a new drive boards to hook up to a mesa board or should i make a new power delivery for the old drive boards and try and use thoes with the mesa board

Perfect, ty so much.
I have a problem with the 7i84u.
In the datasheet mention W1 y W3
But apear W4.
What this do?

Do not change the drives and motors, if they work.
Those seem like analog servo drives, so you would need to wire in the analog input from drives to Mesa 7i77 or 7i97T analog outputs, drive enables, and encoder feedback. In general, that is it.
For detailed info on wiring and testing and tuning the drives (do not move the pots on the drives, ever, no matter what chatgpt tells you) have a look here, and when you start wiring, do not skip steps:
forum.linuxcnc.org/10-advanced-configura...to-example-mesa-7i77

phino wrote:

If a mod could fix the video links in my original post and remove this post, that would be great.

Nope, can not be fixed, something in the links is messing with the editor.
Use youtube if possible as that works fine.

This is the motor drive/power supply the greay wires on the bottom go to the old computer and the ones on the top, i belive the 11 pin connector is the encoder and the 3 is the servo motor. Would i need to use thees drives or another drive board with the 7i7 board? 

What Mesa cards do you have. To reuse the original drives you would probably need a 7i77 Mesa card or similar analog servo control card.

For some reason, the video links in my post above are not showing, and attempts to edit the post don't show me the full post to reach the video links.

I'll try to post the video links in this post.

Drilling holes:

i.imgur.com/mOQMjpb.mp4

i.imgur.com/CB8KpLx.mp4


Straight cuts:

i.imgur.com/YGVQZon.mp4


If a mod could fix the video links in my original post and remove this post, that would be great. A post preview function would help troubleshoot.

That machine uses servo motors not stepper motors. (Probably using analog commands between the control and the drives.)