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Messages - amstanley

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Hi guys, bit of an unusual one here...

I am using Deskproto as a g-code generator,
on an x-carve modified with an A-axis.
running G-code for a tutorial you can find here:  https://www.deskproto.com/gallery/venus.php

On the clearing pass I am using a milling strategy called 'helix' where the g-code essentially runs from one end of the workpiece to the other in a long single pass.
sort of like Meg Ryan peeling the apple in Sleepless in Seattle, in one long cut of the knife...

On a test run I noted that the A axis accumulated a very significant value, on the order to -500k, after about 50% of the g-code lines.
It made me wonder how I will be able to set the axis to zero when the run is finished,
without having to 'rewind' all those turns, which is what would happen if I simply issue a command for 'g0 a0'

anybody have any advice on how to return to zero easily when the A axis value is significant?
Thanks in advance for any help...

 

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General Mach Discussion / Re: Surfacing on Rotary Axis
« on: August 13, 2017, 10:26:59 AM »
The reason I am asking is that I am using DeskProto for G-Code generation and it assumes a cylindrical stock,
so just trying to understand easy options for the workflow.
setting it up with square stock and getting the desired outcome is possible,
but better to start with everything normalized, if that is possible..

Guess I have my answer on this.
Might have to write a g-code generator of art as a side project...

Thanks!

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General Mach Discussion / Surfacing on Rotary Axis
« on: August 06, 2017, 05:22:48 PM »
Long shot but wondering:

There are wizards for surfacing for tool down on X and Y axis: I wonder if  there is a similar wizard for 'surfacing' on an A axis?

I have a bunch of fence posts, and a CNC with a rotary axis. I want to 'surface' the posts so they are round:
essentially the math is they start with a (squared off) radius of sqrt(2*postwidth^2)/2 and end as a cylinder with radius postwidth/2

Is there a wizard where I can plug those values + length of workpiece and get g-code back to go ahead and round it out?

If not, how would YOU easily do that? Any advice welcomed!

thanks in advance

/malcolm

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