Rotary Text Appearing Backwards

[Mark's Wood Chips]

I'm new to rotary machining and have watched all the tutorials but my first attempt at V-carving spiral text on a cylinder failed. Well, maybe not failed because it carved OK but it's backwards. If I were inside the cylinder looking outwards, it would appear correct. The preview appears correct but the physical piece is backwards. There is a "flip design" checkbox in the job setup dialog but it doesn't seem to change the preview after a re-calculation. My machine is a brand new ShopSabre 23 set up at the factory so I presumed it was set up correctly. I would appreciate any suggestions to resolve this issue.

Mark

[IslaWW]

Mark...
Power down the controller. On the stepper drive for the rotary there are 4 motor terminals marked A+, A-, B+ & B-. Swap the wires on B+ & B-

[garylmast]

Or you can mirror the text prior to calculating the toolpath and/or turn the head of the rotary 180°, side to side or end to end.

Gary

[Mark's Wood Chips]

Thank you gentlemen! I thought the A axis was reversed and you confirmed my suspicion. It's a WINCNC controller - is there a software fix in the WINCNC.INI file? If not, I'll swap wires.

Update: I found a parameter for motor direction in axisspec in the WINCNC.INI file. Changed it and everything looks good.

Mark

[Greolt]

You have got it sorted and that is great.

Just for your information there is a line in the WinCNC Post Processor that is as follows,

ROTARY_WRAP_X = "-A"

Removing the minus sign will change the Vectric Gcode output.

Different manufacturers and users will argue about what is the correct direction of rotation for a rotary axis.

I always go with what I believe to be convention as the diagram shows,