What does this button do?  Bad photo, but its set for inches and so is the main area where you choose MM or Inches. Tried to look it up in Mach3 book, but there is no mention of it.

Thanks

Novice

Hi,
the mm/inch button you refer to is equivalent to a G20/G21 command which directs the Gcode
interpreter that the current Gcode/MDI is in either mm or inches.

What you are looking for is called the native units. Config/SelectNativeUnits, see attached.

At the moment your native units, these units are those the Mach uses to calculate motor tuning, homing, limits etc
are mm's. Once you set them LEAVE them alone. That does not mean your machine is limited to mm (or inches),
thats what the button or G20/g21 are for.

So at the moment your 'StepsPerUnit'=400 and
'MaxVelocity'=3200

MaxPulse rate= 400x 3200
                    =1,280,000 pulses per minute
1280000/60 =21.3333 kHz

Thus if you leave the kernel speed at the minimum 25kHz default Machs parallel port is still fast enough for your motor
tuning.

Craig

     Did my first test cuts. Just random 2 D images inside a 10 inch square. Each had 10 passes at the motor settings above. 

     I have a random clicking sound coming from the bed that I need to investigate. May take a video in operation since I have no reference to if its a normal sound or not.



     Novice

Just completed first 3d image of a fish.

Thanks

Novice