DeskProto user forum

Hi, total beginner here so apologies
I have tried to create a chess piece on a rotary a axis, all seemed to be going well except when the code was sent to the machine it’s not reflected in the motion
E.g.
g1 a090
G1 A180
G1 A270
G1 A0
Would result in the a axis revolving just over.2 revolutions

Any help would be appreciated

Thanks

Sorry title should say rotary axis

Is this effect the same for all commands, so from A0 to A90 the axis rotates 180 degrees?
Then something is wrong in the configuration of your machine.
For instance for a stepper motor machine one of the settings is how many steps are needed for one degree rotation.

Hi Lex, with the aid of Google I came to the same answer, I have checked and they look ok
$103 is set to 80, this is what the manufacturer says is correct, I did alter the value and it made no difference

You mention $103, so apparently this is a GRBL based machine. Very strange that changing this value does not make a difference.
This clearly is a machine issue, and I do not know your machine, so I am afraid that I cannot help you out.

Thanks, I have a Twotrees 450 Ultra, I think I have missed putting the circumference into the calculation, so will try later

Fantastic program the Deskproto, tried others and really struggled

Thanks for the compliment :-)

About the circumference: that should NOT be part of the calculation!
The circumference is needed when you wrap a flat relief around a cylinder, and use the mm size of the circumference for the A-axis.
DeskProto does not do this: DeskProto controls the A-axis using degrees.
So I think it should work when instead of the circumference you use '360' in this calculation.

OK and thank you, just tried it very quickly, 35.56 and that seems good