Re: BP Power supply

I'll try the listening trick tonight if I can work it out.

thanks
Keith

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Les Newell <lesnewell@f...>
wrote:

> Hi Keith,
>
> If you want high speeds and are buying motors and drives I would
> seriously recommend servos rather than steppers. Steppers are OK

for

> small jobs but not ideal for a big machine like a Bridgeport. I

only

> used steppers on mine because they were already fitted and I can't
> justify the cost of changing the motors.
>
> I can't understand why you are only getting 20IPM. My machine with
> original steppers and Geckos at 75V will quite happily rapid at

100IPM.

> Are you sure you aren't getting either noise problems or pulsing
> problems from your computer? Have you tried another computer

and/or

> different software package e.g TurboCNC?
>
> Try feeding the step pulses into a pair of headphones. You should

hear a

> smooth whistle that changes pitch as the speed changes. If you

hear

> clicks, buzzes or crackles in the whistle you have software

pulsing

> problems.
>
> Les
>
>
> Keith Clark wrote:
>
> >
> > The sad thing is all this for me is that I bought new stepper

motors

> > this week at about $1800.00 and they do exactly the same thing

the

> > old motors did with maximum rates of only 20 ipm. Seems to be

the

> > Gecko drivers and I may have to break down and spend another

$1000

> > on Anaheim Automation microdrives.
> >
> > If you want the scans of the motor wirings just email me at
> > clarkfamily5@c... (remove the last 2 periods) and I will send
> > it to you.
> >
> > I hope this is of some help to you!
> >
> > Keith Clark
> >