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Author Topic: rotary axis moving slow in conjunction with x axis  (Read 293 times)

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rotary axis moving slow in conjunction with x axis
« on: May 13, 2020, 12:34:08 PM »
I'm using Fusion 360 to model and program tool paths, I'm using the stock mach3mill pp out of fusion.
 
I'm running into some trouble with the rotary axis, when machining a part where both the A axis and the X axis are moving simultaneously the machine seems to run quite slowly.

The speeds don't seem to change no matter what I input in the tool feed & speeds in Fusion. I can get it running a bit faster if I increase the tolerance value but eventually the quality is too poor. The speed at which the machine runs varies depending on the diameter of the final part I'm turning.

So given those facts, with a spiral rotary tool path, a 9" X 1.75" Diameter rod was machined in 43 seconds but a 9" X 1.5" Diameter rod took over 2 minutes. No amount of adjustment in the feed & speeds budged those numbers. Only slight variations when augmenting the tolerance.

Fusion is posting with g93, In Mach3 "use radius for feedrate" is checked.   





Offline Graham Waterworth

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Re: rotary axis moving slow in conjunction with x axis
« Reply #1 on: May 13, 2020, 12:58:11 PM »
Set the rotation radius in the settings tab in mach3
Without engineers the world stops
Re: rotary axis moving slow in conjunction with x axis
« Reply #2 on: May 13, 2020, 01:38:01 PM »
so I'm using a the version of Mach3 that came with my machine. It has some sort of skin that makes it look different then normal Mach3, I'm not seeing any settings tab.

I attached screen grabs of my Mach3, the first is the main page, then there is a tab for advanced setup which brings you to the second screenshot.

What I do have is an option for stock diameter, but changing this hasn't really made any difference it seems.

Offline Graham Waterworth

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Re: rotary axis moving slow in conjunction with x axis
« Reply #3 on: May 13, 2020, 04:06:45 PM »
No Idea, what is under advanced setup
Without engineers the world stops
Re: rotary axis moving slow in conjunction with x axis
« Reply #4 on: May 13, 2020, 05:00:17 PM »
the second screen shot is the advanced setup tab.
If i were to have access to the rotation radius, would I just need to input the final radius of the part I'm turning?

Offline Graham Waterworth

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Re: rotary axis moving slow in conjunction with x axis
« Reply #5 on: May 13, 2020, 05:38:08 PM »
Put this macro into your C:\Mach3\Macros\profile_name

Then turn on the use feed option like the image.

In MDI type M80 R********* where ********* is the radius of your part

Hit return and that will set the value in the background.
Without engineers the world stops