Re: [CAD_CAM_EDM_DRO] Re: G code

In a message dated 12/14/2003 9:26:05 AM Eastern Standard Time,
nigel.christianson@... writes:
Hi Shelby,

Not sure which software you are using, but nornmally the home command
sends the machine to some known position (which does not have to be
0,0,0 in programs like TurboCNC - which I think you might be using
from your description of the slow movement during homing). From
there you move to the work zero using G00 (assuming you have a jig or
something to hold the stock in a known position) and then rezero the
machine using G91 (I think from the top of my head - I don't have G
code manual handy)

HTH
Nigel
Shelby:

Actually, the home command (often G74 but is different with different
controls) sends the machine to the MACHINE reference. This is usually set with limit
switches and a zero/home pulse on the encoder. You would then send the
cutter to whatever new zero position you would like and use a G92 command (again
this can be different with controls) to set the new program zero. G90=absolute
position, G91=relative positoning, G00=rapid positioning, G01=linear
positioning, G02=clockwise circular positioning, and G03=counte clockwise circular
positioning. These are standard G codes for almost every control out there.
Other G codes will change from control to control so you would need to refer to
the instructiions for your particular controller.

Randy Abernathy
4626 Old Stilesboro Road
Acworth, GA 30101
Ph / Fax: 770-974-5295
E-mail: cnc002@...

I furnish technical support, repair, and other related services for your
industrial woodworking machinery. My background as Senior Service Engineer for the
SCMI Group for nearly fifteen years with factory training, combines with my
extensive background in electronics, mechanics, pneumatics, electrical and CNC
machinery to offer you needed support for your machinery.


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