FILENAMES:

contback.jpg
contfrnt.jpg
pendant.jpg
pendcont.jpg
pendfrnt.jpg

DESCRIPTION:

These are pictures of the CNC controller and pendant that Dan Mauch
built.  Posted by Dan Mauch (dmauch@seanet.com)

Dan provided the following description:

>I posted some pictures of my latest CNC controller to the dropbox at
>http://www.metalworking.com   To view the pictures simply go to the url and
>click on 
>"check drop box"
>
>Here is the narrative portion of the files:
>Here are some pictures of two different controller I built. The one with
>the pendant was built for use with a Shoptask (see http://www.shoptask.com).
>The other is the one that I use with my Enco Knee Mill and various other
>machines. Salient features are that it does full step, half step, jumper
>selectable current out from .5-2.5 amps per phase, 20 KZ chopper frequency,
>28VDC output., has provisions for three stepper motors, two solid state
>relays, uses a torroid transformer and has a built in fan. I have built
>several of these in a single axis and a three axis version. They run great.
>The nice feature is that you can run it under computer control or you can
>shift to a manual mode. A built in pulse generator supplied the pulses for
>the manual mode. A direction switch changes the direction of travel. The
>XYZ selector switch selects the axis to be manually controlled ( like a
>three axis power feed system) and last there is an all windings on/off
>switch to engage/disengage the motors. There is also a speed control that
>varies the speed from less than an inch a minute up to 30" a minute
>depending on the gear ratio of the timing belts used, stepper motor used
>and other factors.
>	The pendant has  the same features except that it has a red LED to
>indicate if the power is on and when you engage the windings a led blinks
>to indicate the motors are engaged. The hand held pendant is nice for close
>up and personal work on a machine and keeps the controller further away
>from the machine.
>Dan