Mike/Art:
Would it be possible to laminate together two strips of brass (choose
your thickness)
sandwiching a piece of strip styrene (again choose thickness). To the brass
strips are soldered
leads to go to your Z home or limit input.
The switch is placed on the top of your work and when contact is made
with tool continuity closes
the switch. The switch thickness would be your Z offset.
Just a thought. I usually just use the old trick of bringing the tool
down onto a white Zigzag paper(.001").
Cheers, Vern.
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----- Original Message -----
From: Art
To: mach1mach2cnc@...
Sent: Thursday, February 26, 2004 2:43 PM
Subject: Re: [mach1mach2cnc] Tool set switch
Mike:
What you need is a probe command and a probe input (Digitize). In a
macro
button, you would put a
code( " G32 Z -10 " ) // set the Z number to the max you want to drop in
case of error. If the switch is hooked to the digitize input, the Z drop
will stop when the switch gets activated. Make sure you have room for a
deceleration of the axis. Then you need a
code( "G92Z0") to set the Z axis to zero, then an
code( "G0Z3") to move to 3 inches up, then a
code( "G92Z0") to set it back to zero.
So the whole macro button would be similar to:
code "G32Z-10"
code "G92Z0"
code" G0Z3"
code "G92Z0"
I haven't tested this , but it should do the job. Just make sure your
switch is triggering the digitize input else it won't work and you'll
drive
into the table..
Art
www.artofcnc.ca
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