RE: [CAD_CAM_EDM_DRO] DC brush type motor control

Baldor are expensive, but they are good rugged reliable drives. I have used
many analogue ones, never had a problem.

There are a number of others, some good, some not, and some unknown which we
are presently trying to evaluate.

The cheaper questionable ones are:-

Rutex a step direction drive that has some noise issues.
http://www.rutex.com/entersite.htm

Teknix the Tek20 but it has presently be removed from their
website. They will supply specifically after discussing motor specs.
http://cncteknix.com/portal/index.php

LarkenCNC Viper drive, new product, sounds good, don't know
anyone using the high voltage ones yet.
http://www.larkencnc.com/viper/index.shtml

Servo Dynamics, analogue drive, mid priced, looks professional?
http://www.servodynamics.com/Br_Brs.html

Jon Elson's drives, it is a pwm input drive, but depending on
how you want to control it may be suitable. They are supposed to be very
tough, and Jon will support you from this site and others. The price is also
quite good. http://jelinux.pico-systems.com/pwmservo.html



Many of us have Rutex drives. Some like them, some have endless noise
issues. The PID control is good, but transient protection and noise immunity
appears not to be.

I have Rutex drives, I have beat the noise issues, but after a recent
failure am looking for a more reliable drive.

Several people have the low voltage Teknix drives and are happy with them.



Hope this helps, be very wary of the sales BS, give the drive manufacturer
all your machine details motor etc, and ensure they say it will work,
offloading some of the liability so to speak.



Regs Mark





Dr. Mark Vaughan Ph'D. B.Eng. M0VAU

Managing Director

Vaughan Industries Ltd, reg in UK no 2561068

Water Care Technology Ltd, reg in UK no 4129351

Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
Phone/Fax 44 1872 561288

RSGB DRM111(Cornwall)

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Bob Campbell
Sent: 03 April 2007 15:48
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] DC brush type motor control



Billy,

Baldor makes one.

I built a control box recently for a customer using a Baldor speed control.
The 0~10 VDC speed control came from our combo breakout board.

Robert Colin Campbell
Bob Campbell Designs
www.Campbelldesigns.net
Mach 2/3 breakout boards
Relay boards
Spindle Speed boards
Stepper motors
Plasma Torch Height control

----- Original Message -----
From: subsailer326
To: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
DRO@yahoogroups.com
Sent: Tuesday, April 03, 2007 7:31 AM
Subject: [CAD_CAM_EDM_DRO] DC brush type motor control

I plan to use a 120 volt DC brush type motor, 6 amp to drive spindle on
small mill.

Where can i buy a motor control?

Tthank you

Billy

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