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### Author Topic: A axis setup ?  (Read 6099 times)

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#### stevehuck

• 333
##### A axis setup ?
« on: January 12, 2010, 06:24:49 PM »

If I set my rotary axis on the left side of the mill facing tward the spindle (standard deal) and have the axis at zero. If I give mach the old A10.00, will zero degrees rotate tward me or away from me. What is the standard direction of rotation.

#### M250cnc

• 591
##### Re: A axis setup ?
« Reply #1 on: January 12, 2010, 06:32:13 PM »
What ever direction you want.

All things being equal you will have a machine with no backlash, and rotating 10 degrees will rotate in a climb mill fashion.

If you have backlash then you will find in best to use the conventional method.

Phil
The Good Thing About Mach3, Is It's very Configurable

• 4,908
##### Re: A axis setup ?
« Reply #2 on: January 12, 2010, 06:40:28 PM »
Typically, if you stand in-line with and axis with POS direction going away from you, then a rotary for that axis will be (+) clockwise from that view.
I'll look for the illustration.
Of course...Phil is right too, you have the power to make your own rules if you'd like.
Russ

• 4,908
##### Re: A axis setup ?
« Reply #3 on: January 12, 2010, 07:06:41 PM »
Here is a clip,

"Now for the cartesian coordinate system right-hand rule as it applies to a rotary axis direction. Imagine wrapping your right hand around a linear axis with your thumb pointing toward the positive direction. The direction that your fingers are wrapped represents the positive direction for the rotary axis that rotates around that linear axis."

Still looking for that dang pic I had.....it's perfect, wherever it is. lol
Russ

#### stevehuck

• 333
##### Re: A axis setup ?
« Reply #4 on: January 12, 2010, 07:25:46 PM »
What ever direction you want.
The thinking is that if there is a standard direction then i could comply and increase my chances of being able to pass off a piece of Gcode to someone else.

• 4,908
##### Re: A axis setup ?
« Reply #5 on: January 12, 2010, 07:40:42 PM »
..................then you would want to stick with convention.
Here ia an illustration, can't find the one I had.
Russ

#### stevehuck

• 333
##### Re: A axis setup ?
« Reply #6 on: January 12, 2010, 09:04:04 PM »
Exactly what i was looking for!!

Thank you!

#### Greolt

• 956
##### Re: A axis setup ?
« Reply #7 on: January 13, 2010, 01:58:01 AM »
Yes there is a conventional direction of rotation.

Not that you have to follow convention of course.

Here is a pic I found.

Greg

#### Hood

• 25,838
• Carnoustie, Scotland
##### Re: A axis setup ?
« Reply #8 on: January 13, 2010, 03:01:03 AM »
One problem I see with not following convention is the toolpath view would be showing incorrectly for the A Axis.
Hood

#### Greolt

• 956
##### Re: A axis setup ?
« Reply #9 on: January 13, 2010, 03:30:27 AM »
Yes that is one good reason to follow convention and there are many others.

I said you don't have to follow convention, because I often encounter a bit of resistance to the idea of a conventional direction, whenever I mention it.

Sort of hosing down the flames before they start.

Greg