Bridgeport Series 1 MDI Conversion

[martyscncgarage]

!f the shaft size is 15.87mm, then those are 5/8" Imperial sized shafts.

If that's the case, then they are most likely standard NEMA 42 motors (which I might expect it being a Bridgeport)
AC servo motors are more efficient and have a pretty even torque curve. I have simply reused the existing pulleys on my retrofits to keep things easy.

Marty

[Chaz]

!f the shaft size is 15.87mm, then those are 5/8" Imperial sized shafts.

If that's the case, then they are most likely standard NEMA 42 motors (which I might expect it being a Bridgeport)
AC servo motors are more efficient and have a pretty even torque curve. I have simply reused the existing pulleys on my retrofits to keep things easy.

Marty

Thanks, so look for Nema 42 sized AC servos?

[martyscncgarage]

!f the shaft size is 15.87mm, then those are 5/8" Imperial sized shafts.

If that's the case, then they are most likely standard NEMA 42 motors (which I might expect it being a Bridgeport)
AC servo motors are more efficient and have a pretty even torque curve. I have simply reused the existing pulleys on my retrofits to keep things easy.

Marty

Thanks, so look for Nema 42 sized AC servos?

IF that's the direction you want to go, new servos and drives. Double check your current motor's measurements.
Can you provide picture and nameplate of your current DC servos? They in need are smooth 5/8" shaft? Length?
You can give DMM a call with those dimensions and information and they will match them up for you.
You can drive DYN4 with Acorn. Buy their ready made DYN4 to Acorn Cables.

Marty

[Chaz]

Some pics below. The motor specs indicate its a 0.63 KW 2 NM motor. Nothing special, a 0.75 KW Servo will easily do the required job. The mounting and pulleys is the more interesting bits.

[Chaz]

Offloading was a pain without a forklift, managed to pull it down on a pallet truck. Motor specs in the pics below.

[Chaz]

In terms of shafts, yes 5/8th of an inch, smooth (the pulley has some form of compression system) and around 55mm long, much longer than most shafts.

[martyscncgarage]

That machine looks very clean. Appears little used? Rigid ram. Good heavy machine.

I would consider the All in One DC provided you can replace the encoders and the motors check out.

Like I said earlier, run with the original spindle motor with an inexpensive VFD for awhile. I think you'll likely be pleased.

[Chaz]

That machine looks very clean. Appears little used? Rigid ram. Good heavy machine.

I would consider the All in One DC provided you can replace the encoders and the motors check out.

Like I said earlier, run with the original spindle motor with an inexpensive VFD for awhile. I think you'll likely be pleased.

The machine is very clean. The previous owner had started to clean / repaint the main body, I'd probably continue this for the rest. We did scratch the paint a bit so needs to be touched up (when we offloaded).

The problem with the All in One is the price. I can get Centroid, 3 new servos and be left with a significant amount of change.

Ill speak to him about the encoders, not sure why the confusion. I'm not complaining, I didnt pay a lot for the machine and I think selling the spares (motors / encoders) would probably make me cost neutral by the time this is all done.

[martyscncgarage]

Let me know what you want for the motors provided they are clean and ok....

[agsweeney1972]

In terms of shafts, yes 5/8th of an inch, smooth (the pulley has some form of compression system) and around 55mm long, much longer than most shafts.

You can find some more information about your existing motors in the attached document.