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g41&g42 doubt
« on: February 05, 2013, 01:31:50 AM »
hi to all,

i am using latest Mach3 version  R3.043.067. i problems that i face

1)when tool compensation g41 or g42 is used the inner circle dosent seem to close when i stimulate & also run it online using machine.
i have attached the g code and screen short of the eg files.
[sq size50x50 with fillet 5mm and inner 20 dia circle]

2)the reverse run command also dosent work well. please clarify how to use this command.
-----------------------------
regards,
adhityan
INDIA.

Offline Hood

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Re: g41&g42 doubt
« Reply #1 on: February 05, 2013, 02:54:10 AM »
Probably best to use the lockdown to see if its ok with it. Even the lockdown has issues for me with Turn but Mill seems fine.
Hood
Re: g41&g42 doubt
« Reply #2 on: February 06, 2013, 04:12:12 AM »
hi hood,
thanks for your reply.

the problem still exists in previous lock down version(ie)066.
anyway i have got a solution for now(ie)if i add dummy lead out(g01 x35 y25) after g03  command it closes the circle.

 lead in/ led out are critical in case of cutter compensation i guess.

Offline Hood

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Re: g41&g42 doubt
« Reply #3 on: February 06, 2013, 04:21:19 AM »
Yes you need them :)
Hood
Re: g41&g42 doubt
« Reply #4 on: February 06, 2013, 07:57:43 AM »
My opinion is:
- For an inner circle you must position in the circle close to the starting point G00 X30 Y20.
- Approximate z workpiece G00 Z1.
- Program Z-2 F200.
- Program G01 G41 (not G42) X35 Y25 F400 D01.
- Program G03 X35 Y25  I-10 J0.
- Program G01 X40 yY30.
- Program G00-G40 Z5.

this should work.
Re: g41&g42 doubt
« Reply #5 on: February 07, 2013, 05:50:34 AM »
@ jdmaya,

generally mill/router wont require lead in&out .so i tried using dummy leadout by specifying the end point of circle.

Offline BR549

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Re: g41&g42 doubt
« Reply #6 on: February 07, 2013, 01:23:12 PM »
ALL tool comp work (G41/42) MUST have a proper leadin and leadout move to work properly.

(;-) TP