Re: [CAD_CAM_EDM_DRO] Re: Stepper cnc retrofit ? For Tape-O-Matic

Wally K wrote:

> Wally K writes:
>
> Allen & Marsha,
>
> To summerize the details of your Tape-O-Matic and make it easyer for
> others to follow i have condensed previous posts.
>
> You want to use a like new (mechanically) 1967 Pratt & Whitney
> Tape-O-Matic 2 axis machine for drilling with peck and some 2D
> milling.
>
> The Tape-O-Matic was primarly designed for drilling but is capable of
> light duty milling.
>
> You want to use a Tape-O-Matic for drilling with peck and some 2D
> milling.
>
> 1) Machine has zero backlash ballscrews on X and Y axis.
>
> 2) The steppers are 400 in. oz. 5 wire unipolar steppers mounted
> with a 1-1 belt ratio.
>
> 3) Spindle has a 3HP motor turning it.
>
> 4) Machine originally had a speed of 10 in./min. max. But you would
> like to see 30" to 60"/min.
>
> I still have the following questions about your machine.
>
> 1) I did not understand your last answer of pitch is 5. What does
> this mean. It might be easier if you told me how much travel you get
> with 1 turn of the screw.

.200 inches

>
>
> 2) What are your plans for the Z axis. Is it still powered by the
> DC motor. Do you want to replace it with a stepper motor.

I would rather use the system in place, which has the drive but no depth control.
A stepper motor is not out of the question.

> Or do you
> have a manual methode for moving the quill you want to use.

Yes, I have a manual quill handle also.

>
>
> Your previous reply about the quill. "it was powered by a DC motor
> through an electric clutch, this drove a a Bridgeport style quill
> feed. The depth originally was controlled by several adjustable limit
> switch pairs, long since gone". It is not zero backlash.

It is not zero backlash

>
>
> > > --- In CAD_CAM_EDM_DRO@egroups.com, Robert Allen & Marsha Camp
> > > <mcamp@t...> wrote:
> the controller is garbage.
> > > > Based on the info I have that I can buy (2) 720 in. oz. motors
> > > ($250 ea.), (3) drives (gecko), and CNC Pro software ($550 for
> > > > software and drives) for $1050 and estimate $300 for power
> supply.
> > > >
> > > > My questions are:
> > > > 1. Can/should I keep the motors?
> > > > 2. Is steppers the best way to go for lowest cost when
> performance
> > > isn't critical?
> > > > 3. Any suggestions for lowering cost?
> > > > 4. Any experience with any of this equipment/software?
> > > > Thanks in advance
> > > > Bob
>
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