Topics

1

G-Code, CAD, and CAM discussions / Squares Are Not Square

« on: July 02, 2013, 04:15:39 AM »

Hi,
I have an interesting problem with my CNC router.  I create drawings in AutoCAD, generate the CAM files with SheetCam, and drive the machine with a SmoothStepper.
I noticed that the inner corners of some square shapes I was contouring were more rounded than the radius of the cutting tool.  When I slowed the Y axis right down on Mach 3, the squares were no longer squares. 

After slowing the Y axis down, the router cuts in the Y direction, and while the gantry decelerates before it gets to the corner the X axis starts moving.  So I get a parallelogram rather than a square.

I would expect that when cutting a square that the routing on one axis should complete before the other axis starts to move.  Very peculiar.

Help/advice appreciated.

David

2

SmoothStepper USB / New USB Driver Crashes Mach3

« on: July 02, 2013, 04:07:45 AM »

Hi,
I just updated my SmoothStepper driver from version...24 to ...28.  Now Mach3 just hangs while starting and I get the hourglass symbol - for ever.

Any suggestions?

David

3

Sieg Machines / X3 4th Axis Thread Cutting

« on: November 25, 2009, 01:57:19 AM »

Hi, just purchased an X3, and about to take delivery of a CNC Fusion CNC kit, steppers, controllers, etc... Have also purchased a Vertes HV-6 Rotary Table and will buy a Division Master conversion kit to create a 4th axis.

I'm interested if anyone has attempted thread cutting using a similar setup with Mach 3 control. The approach being to hold and slowly rotate the stock in the 4th axis, and have a milling cutter in the collet that has a 60 degree taper for cutting the thread.

ideas/thoughts/comments appreciated.