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Need a jump start
« on: May 29, 2006, 01:02:40 PM »
Hi,
I've been playing with the idea of making a CNC lathe from scratch ala "Stevie on CNCzone. I've even gathered parts for it.
The other day I ran across this (go to the "Using the Taig CNC mill as a VMC" and view the video)
http://members.shaw.ca/mryankey/taigmill.html

That is exactly what I want to do with the lathe. If I could get my mill to do that I would not need a CNC lathe.

Problem is I'm having a hard time wrapping my head around exactly how to get that done.
I'm weak on tool offsets and how they all work but think I can figure out the rest of it.

Can anyone give me a jump start on that?
I've been looking thru the videos and haven't found one that makes it "click".

Thanks
James

Offline Graham Waterworth

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Re: Need a jump start
« Reply #1 on: May 29, 2006, 05:33:43 PM »
On a mill the tool offsets are a way of telling the control the difference in length from one tool to the next.

When you set tool 1 as the datum tool, all others are set in offset as the difference in length from tool 1.

E.g.

1 Insert tool 1 into the spindle.

2 Move down until the top of the work is touched.  Zero out Z axis.

3 Do work for that tool.

4 Load next tool, move down until it touches the top face of the work.

5 The value in the Z axis DRO is the offset for this tool .  Enter this value in the offset you want to use for this tool.

6 In the NC code for this tool  you should have 'G43' and a H followed by the offset number to use, this will use the offset on this tool.

Repeat for next tool.

Is this what you wanted?, if not just say.

Graham.

Without engineers the world stops