Re: [CAD_CAM_EDM_DRO] Re: Bridgport stepper replacement?

Nate,

If you have a motor/driver that is failing and having trouble finding one. This might be a good juncture to consider changing over to servos. I run two BP ser.1's on servos with G320's and am very pleased with the performance. There are alot of used servos on Ebay.

As Jon points out in a later post about the quill motion building resistance with presence of debris. This is a common issue/problem with Bridgeports. I had one that locked up so tightly once that we had to disassemble the head to correct it. What we found on it was, where the pinion shaft goes through that engages the rack on the quill itself, the bushings of the pinion shaft (same shaft the feed lever mounts to) were what was locking up. Running a reamer through it the same size of the shaft fixed it. If you are machining alot of hot-roll with grayscale on it, That will definitely lock the quill up and in a very short period of time. The quill-fit in the head is extremely close and it doesn't take much to bind it. I'd pull the motor if it's quill driven Z and see how much resistance it has.

Ron



rocketscientistnate <rocketscientistnate@...> wrote:

> Too small, You need about a 900 oz/in motor.
>
> Also reckon in that these are 34 type motors and you have to factor

in a conversion plate

>
> John s.
>

Any suggestions for something else?
Thanks
Nathan






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