I have a blue chinese CNC controller box that was made for a 6040 CNC mill, I got it used on eBay and fixed it up a bit, it uses TB6560 chips, installed on four separate driver cards.
What I want to do, is use the blue chinese CNC controller box with Mach3 to:
(1) CNC routing using only 3 drivers
(2) 3D printing, using the 4th driver to drive the extruder
But I can't even get Mach3 to cut anything correctively, it seams to move to far in the different axes, and then cut to small, I have Mach3 setup in inches, but I have tried in millimeters, I am using Cut2D to generate G-code in inches, the Shapeoko 2 does move in the direction of the keyboard arrow keys, and the TB6560 driver cards are set to 1/8 microstep.
Here is the math I have done, I am not good at math
----The Stepper Motor:
Steps Per Revolution 200
----Aluminum GT2 Pulley:
Teeth 20
Pitch 2mm
----GT2 Belting:
Width 6mm
Pitch 2mm
----Usefull Info:
1 Inch = 25.4mm
----M8x1.25 Threaded Rod:
1.25mm of travel for one rotation
20.32 Threads per inch
25.4mm / 1.25mm = 20.32 turns per inch
----X and Y Axis Math in Millimeters:
20 Teeth x 2mm Pitch = 40mm
200 Steps Per Revolution * 8 Microstepping = 1600
1600 / 40 = 40
40 Steps per mm
----X and Y Axis Math in Inches:
2mm = 0.0787402 inch
20 Teeth x 0.0787402 inch = 1.574804
200 Steps Per Revolution * 8 Microstepping = 1600
1600 / 1.574804 = 1015.99945136
1015.999 Steps per Inch
----Z-Axis Math in Millimeters:
200 Steps Per Revolution * 8 Microstepping / 1.25mm Length of travel for one rotation
200 * 8 / 1.25 = 1280
1280 Steps per mm
----Z-Axis Math in Inches:
200 Steps Per Revolution * 8 Microstepping = 1600
1600 * 20.32 turns per inch = 32512
, I made sure Microstepping was set to 8, and for "Leadscrew Pitch" I think I set it to 0.635, to get 1016 Steps / in, then used the "Test this Axis" to move the Axis one half inch and used a ruler to see if it was moving the correct amount, most of the time when I tested a dip switch setting it moved enough to hit the end stops, so I had to be careful, the drivers were not set to 8 Microstepping if this test works, also I found my Z-Axis driver dip switch was slightly melted and not working, I had used a hot-air rework station to fix the drivers and I guess I got to close to the dip switch, I was able to fix the dip switch.
