Re: help with Y axis on bridgeport

Hi Carey, i was wondering on your knee powerfeed if you made this a
stepper or servo drive for precision position. Or put a motor on it
with a power switch for rough position (thats what i was thinking of
doing.

Did you modify your knee axis to mount motor.

Wally K.



--- In CAD_CAM_EDM_DRO@egroups.com, "Carey L. Culpepper" <mr.c@b...>
wrote:

> Wally: I did a Bridgeport conversion and can tell you what I have

done. Take the crank handle off. Unbolt nut and crank slides

> off.Then remove the scales. What you will find is an alloy

(aluminum or zinc) plate with 3 - 1/4 x20 screws. This is your new

> mounting point. It may not look like it but it can be if you want

it to be.. Both the x and y axis are the same. At least on the

> left end of the x axis anyway. I even mounted a stepper on the knee

feed(my z axis). Same deal- that alloy plate with 3 screws. My

> knee feed motor mounts directly to the left side. My y motor mounts

to the right side but lower and close to the machine. The x

> motor is mounted on the left end with the motor outboard so I lose

no travel. Every axis is belt driven (2to1). The motor mounts are

> machined from 1/2" plate aluminum. The x and y mounts are exactly

the same. The z is at an angle. I machined a circular recess in

> the back side of each plate. This is needed because the alloy

plates with the 3 holes don't come flush with the casting. It might be

> easier just to make a sheet metal shim or just 3 thick washers to

space out the motor plate. These alloy plates(with the 3 holes are

> actually holding in the bearings. The last step is to cut some

tubing(5/8" ID) to slip over the shaft after you put the pulley on.

> This is a distance piece to tighten up to the bearing. I just put a

3/4 box wrench on the y feed if I need to manually move that

> axis. The x axis still has the right side hand crank. If you decide

to power the knee let me know. The hub screws off. I struggled

> with that for a while until I discovered that.
> I hope that you are able to visualize what I have described. I have

not altered any parts or drilled any hole in the machine. I just

> used what is already there. I hope this helps. Let me know if you

need more information. Carey

> Wally K wrote:
>
> > I am trying to design the mounts for a bridgeport retrofit to CNC.
> > my machine is assembled and i cannnot see how the internal end of

the

> > Y axis is mounted. Does anyone have pictures or drawings of this.
> > Or any words of advice.
> >
> > Wally K.
> >
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