Tool Offsets? - CNC Lathe

Started by erathbun on May 17, 2020 in TinyG Support. 1 reply, last activity May 17, 2020.

erathbun May 17, 2020 #

Hello,

I have been building a CNC lathe with the Tinyg Controller and a Sherline manual Lathe. I have already cut many successful parts and everything has been going well. I just bought a quickchange tool post which allows me to quickly change out tools and they will be exactly the same every time. I was hoping to use the tool table to set offsets until I realized that is only available on G2Core. That was a bummer and I really should not have bought this controller for this application. But I found another possible solution on the wiki.
I only have 4-5 tools really that I would using. Could I use the G54-59 commands in place of the tool library? G54 would always be the same tool and set to x0 z0. Then the other coordinate systems could be loaded depending on the tool being used. Would this work? Or is there something I am misunderstanding on how that feature works?

Thanks for any input you have. I have really been enjoying using chiliPeppr and the hardware other than current tool problem.

Thanks!

cmcgrath5035Staff May 17, 2020 #

What CAM software do you use with your setup?
There is a tool change macro in Chilipeppr and I believe in cnc.js as well,
I have never tried them but perhaps they would give you some hints.
Google finds lots of hits

I assume you have studied this wiki page https://github.com/synthetos/TinyG/wiki/Coordinate-Systems

Not understanding exactly how your machine is running and aligning tool position with work piece, its not obvious how shifting coordinates would do what you want, but you believe it would.
I have to assume you are generating your own Gcode, since the detail of how coordinate systems would affect your design would seem to be custom.

The wiki reference above describes how to change coordinate systems on the fly. The CAM systems have example of how to stop running Gcode to make a toolchange. Seems like a custom combination of the techniques could achieve what you need.

A lot of assumptions on my part. Any of them help so far?

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