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Hi
I'm interested in the gcode for cutting multiple threads on a lathe.
https://www.youtube.com/watch?v=__vh...ature=youtu.be
I would like to get an example of a finished program. (M20*2.5 L10)
I would like to get a link to the full guide on gcode for PlanetCNC
Quote:
Originally Posted by R2D3
This code will cut a single-start thread.
It does not work with the current release of TNG as this version doesn't support G76, but should be OK with CNC USB & TNG 2017 beta software.
I think it will work when TNG v2 is released.
(PLANETCNC-TNG LINUX-CNC)
(ECAM V4 ***LATHE*** )
(CREATED ON 27/07/2019 AT 23:19)
(PART DESCRIPTION: BRASS THREAD)
(PROG NUMBER: 1)
(STOCK O/D: 20.000)
(STOCK I/D: 0.000)
(STOCK LENGTH: 25.000)
(------------------ TOOL LIST ------------------)
(TOOL:EXTERN THREAD TOOL )
(-----------------------------------------------)
(SINGLE START THREAD)
G08 G18 G21 G40 G54 G61 G80 G90
(M20 X 2.5)
(EXTERN THREAD TOOL )
(MAX Z TRAVEL: 2.500)
(MIN Z TRAVEL: -10.000)
(MAX X TRAVEL: 10.500)
(MIN X TRAVEL: 8.466)
G94 T15 G43 H15 M6
G97 S600 M3 G04 P1 M8
G0 X10.500 Z2.500
G76 P2.500 Z-10.000 I-0.500 J0.280 K1.534 E1.534 H2 L2 Q29.4 R1.7
G0 X10.500 Z2.500
G53 X40.000 Z100.000
M5
M9
M2
Hello everyone again.
I am using TNG now. Today I tried using G32 and G33 codes and ran into a problem. The code does not work automatically, stopping at G33. In MDI mode, the G33 code starts and works without problems. I try start this code:
%
G21 G18
G00 X-0.1 Z5
G33 Z-15 K0.1
G01 X2 F50
%
Please note that you would need to turn on spindle in order to receive the index signal
I added M03 to the code but this does not help.
I turn on the spindle power manually.(He works at the beginning of the program.If I type a line with code, ?fter the program freezes G33 ... in MDI it runs fine, machine moves).
I specify about the index signal. Use an encoder. He has a signal A and B. Do I need an index signal as well?
P.S. In simulation mode, with the board turned off, the program works fine.
P.P.S. If i turn on Uer Interfase> Spindle RPM (As Set) Program does not work(With connected board).
First G33 code in sequence needs index signal. without index signal thread entry point is not same and cut is ruined. G33 waits for this index signal.
If I understand correctly, then I need to arrange the connection of pin GND and pin IDX to CTRL with each spindle revolution?
This is optimal.
You can also try setting "Index PPR" value to 0. Not 100% sure but I believe that in this case index signal is ignored and position is calculated from encoder. At least this is how it will be done in TNGv2.
I will ask a question for the future.
Will it be possible to shift the position of the beginning of the thread on the part?
Sometimes you need to create a thread with several thread beginnings