Hello Guest it is March 28, 2024, 01:34:51 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Topics - durl jones

Pages: 1
1
Hi,
I have build my 2nd CNC machine using Mach3 and I really enjoy it.  I have a problem which I am not able to figure out

I have my home switches in place and also identified as zero switches.  I am nearly positive I have the inputs and homing configured properly since I have compared it to my other system.
I also share one normally closed input on line 10 configure as switch open to indicate a home position on all 3 axis.  This works as well.

My problem is that the system Homes First Z axis, then Y axis, then X axis.  When the Z axis homes it moves the home switch and stops.  Then the Y and Z axis home and when they get to their home switch they bounce off it about 0.05" or so.  I can't figure out how to adjust the Z axis to bounce off of the home switch when it is homing.  The reason I need this is about one out of two time I get a Reset due to "limit switch engaged." Then I have to reset the system or sometime shut it down to move the Z axis off of the switch.

Any Ideas how to correct my Z switch to make it bounce like the X and Y?  Also I replace the first Z switch with another and it still operates the same and I am about .250" away from the physical hard stop on the lead screw so nothing is in the way of the switch.

Thanks,
Durl

durlj@comcast.net


2
I am new to Mach3 and writing Gcode - but like it so far.

My question:
I am milling repeat pieces that have the same x and y profile but have variation in the z height.  I have set up a part fixture to hold my blanks and written the program to home up first and then go to my blank to begin machining.  I am in the absolute coordinate system.  I would like to be able to set my Z position higher than the highest blank I will be using and then lower it to the correct height once I begin machining.  When I pause the program and lower the Z it goes back to the original height.

I'm sure I am missing some basic concept for adjusting the cutter position while in an executing program?

Thanks,
Durl

Pages: 1