Need Help!- Sherline CNC mill

[solskov]

Hi there.

I am a beginner in cnc.

I am using EMC to control my Sherline CNC-mill.
Can anyone help me with G41 / g42 and g43.
My problem is how to call for the values in my program.

Henrik Solskov

[cadmonkey]

The RS274NGC manual - http://www.linuxcnc.org/handbook/RS2...RS274NGC_3.pdf
See pages 28 & 29 (pdf page #s 36 & 37)
As for "calling for the values in your program" I assume you are asking how to set the tool radius and tool length. Those need to be set in your tool table (tool.tbl in the directory that holds the configuration files is the default) - the documentation describes the format of the file, but the entries already in it are self explanatory. So to turn on cutter radius compensation to turn on cutter compensation left for a .25" diam tool, you need to have a .25" diam tool in your tool table file and program G41 Dt where t is the slot number for that tool. Same goes for the tool length offset. If you don't specify a tool (ie just programming G41) then the current tool is used, if you have already identified the tool number in the program or the current session with an M06 Tt (t again is the tool # from the table). If you haven't done that then the current tool is 0 which according to the tool table has a radius of zero so no offset is engaged.

HTH

Greg