RE: [CAD_CAM_EDM_DRO] Re: Remember Mr. Bill's servo lite?

One way to get more speed is with a lower steps per unit by changing out the
encoders. That is if the motor speed isn't already maxed out by the voltage
of the power supply. Generally, on a servo motor, speed is proportional to
voltage. If you disconnect the servo motor from the amp and run it on the
dc and measure the RPM and compare that to the speed at 200 IPM then you can
see what upside is possible. Been a long time since I looked at the 2501
so I don't remember how fast they can be pulsed. BTW I called Bill and
mentioned to check his email.



Dan



From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of mikep_95133
Sent: Sunday, January 15, 2012 11:24 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Remember Mr. Bill's servo lite?





Dan: Thanks for that explanation. That's how I understand their operation as
well.

I am just aiming at 200+ipm with an upgraded pc and emi reduction. May have
to add an oiling system.

What's the fastest ipm with Servolite you have heard of? I have 20,000
pulses per inch, so the ps2501 opto's I think are a bit stressed. I have the
scope down stairs. I'll look at the wave forms when I get a minute.

All: To me there's just as much danger using a variac in my shop, as when I
plug in a toaster that is not isolated either. I deal with 400vdc every day.
Dealing with electric power is always a risk. I'm leaving my system as it
is.

Mike

--- In CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> , "Dan Mauch" <dmauch@...> wrote:

>
> A Variac is a autotransformer. An autotransformer does not provide
> electrical isolation between its windings as an ordinary transformer does;
> if the neutral side of the input is not at ground voltage, the neutral

side

> of the output will not be either. A failure of the insulation of the
> windings of an autotransformer can result in full input voltage applied to
> the output. Additionally, a break in the part of the winding that is used

as

> both primary and secondary will result in the transformer acting as an
> inductor in series with the load (which under light load conditions may
> result in near full input voltage being applied to the output). These are
> important safety considerations when deciding to use an autotransformer in

a

> given application.
>
>
>
> Dan
>
> From: CAD_CAM_EDM_DRO@yahoogroups.com

<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com

<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> ] On Behalf Of mikep_95133

> Sent: Thursday, January 12, 2012 7:45 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com

<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

> Subject: [CAD_CAM_EDM_DRO] Re: Remember Mr. Bill's servo lite?
>
>
>
>
>
> Really? How so? It's only been a part of the system for years now.
>
> Mike
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com

<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> , "Dan Mauch" <dmauch@> wrote:
> >
> > Using a variac isn't safe. You really shouldn't use one with your servo
> > system.
> >
> >
> >
> >
> >
> >
> >
> > Dan Mauch
> >
> > www.camtronics-cnc.com
> >
> > dmauch@
> >
> > Stepper and servo motors
> >
> > Kits, assembled and custom CNC using Gecko products.
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

[Non-text portions of this message have been removed]