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threading macro help
Posted: Mon Jan 22, 2024 5:36 pm
by turbothis
chatbots got me mostly there but i cant get the Z increment on the start side of the cut
Code: Select all
( threading starts at Z zero )
G20 G18
G00 X1.0 Z0.0 ( Clear plane )
M04 S500 ( Set spindle speed to 500 RPM )
G04 P3 ( Dwell for 3 seconds )
#1=[0.0025] ( Depth of Cut )
#2=[0.040] ( Total depth of thread )
#3=[0.560] ( Length of thread / start position )
#4=[0.0394] ( Thread pitch / per rotation )
#5=[0.0025] ( Increment for Z-axis per pass )
#9=0 ( DOC so far )
#10=0 ( Cumulative Z-axis movement )
M100
M98 P100 L[#2/#1] ( Number of passes = total depth / DOC )
M2
O100
#9=[#9+#1] ( Increment DOC )
#10=[#10+#5] ( Increment cumulative Z-axis movement )
X-#9
G32 Z[#3+#10] F#4
G0 X0.200
Z0.0
M99
Re: threading macro help
Posted: Mon Jan 22, 2024 6:17 pm
by TomKerekes
I think at the end instead of always moving Z back to 0 move to #10
Re: threading macro help
Posted: Mon Jan 22, 2024 7:08 pm
by turbothis
excellent!
Code: Select all
( threading starts at Z zero )
G20 G18
G00 X0.5 Z0.0 ( Clear plane )
M04 S500 ( Set spindle speed to 500 RPM )
G04 P3 ( Dwell for 3 seconds )
#1=[0.0025] ( Depth of Cut )
#2=[0.040] ( Total depth of thread )
#3=[0.560] ( Length of thread / start position )
#4=[0.0394] ( Thread pitch / per rotation )
#5=[-0.0014] ( Increment for Z-axis per pass )
#9=0 ( DOC so far )
#10=0 ( Cumulative Z-axis movement )
M100
M98 P100 L[#2/#1] ( Number of passes = total depth / DOC )
M2
O100
X-#9
#9=[#9+#1] ( Increment DOC )
#10=[#10+#5] ( Increment cumulative Z-axis movement )
G32 Z#3 F#4
G0 X0.200
Z-#10 ( Increment cumulative Z-axis movement )
M99
Re: threading macro help
Posted: Mon Jan 22, 2024 7:15 pm
by turbothis
i had chatbot modify it further to make it more user friendly in that an angle can be directly input and the macro would do the math but i think it is too much as it does not work
Code: Select all
( threading starts at Z zero )
G20 G18
G00 X0.5 Z0.0 ( Clear plane )
M04 S500 ( Set spindle speed to 500 RPM )
G04 P3 ( Dwell for 3 seconds )
#1=[0.0025] ( Depth of Cut )
#2=[0.040] ( Total depth of thread )
#3=[0.560] ( Length of thread / start position )
#4=[0.0394] ( Thread pitch / per rotation )
#6=[29] ( Desired angle in degrees )
#9=0 ( DOC so far )
#10=0 ( Cumulative Z-axis movement )
( Calculate the Z increment based on the angle and DOC )
#5=[tan[#6 * 0.0174533] * #1] ( Increment for Z-axis per pass )
M100
M98 P100 L[#2/#1] ( Number of passes = total depth / DOC )
M2
O100
X-#9
#9=[#9+#1] ( Increment DOC )
#10=[#10+#5] ( Increment cumulative Z-axis movement )
G32 Z#3 F#4
G0 X0.200
Z-#10 ( Increment cumulative Z-axis movement )
M99
Re: threading macro help
Posted: Mon Jan 22, 2024 9:21 pm
by TomKerekes
GCode trigonometric function parameters are in degrees not radians.
Re: threading macro help
Posted: Mon Jan 22, 2024 9:36 pm
by turbothis
i figured there would be something like this way over my head!
Re: threading macro help
Posted: Mon Jan 22, 2024 9:59 pm
by TomKerekes
Just remove the * 0.0174533 (PI/180) which is converting from degrees to radians
Re: threading macro help
Posted: Mon Jan 22, 2024 11:46 pm
by turbothis
ok
what is the (PI/180) ?
Re: threading macro help
Posted: Tue Jan 23, 2024 12:04 am
by Moray
turbothis wrote: ↑Mon Jan 22, 2024 11:46 pm
ok
what is the (PI/180) ?
Pi/180 = 0.0174533
It's how you convert between Degrees and Radians.
Re: threading macro help
Posted: Tue Jan 23, 2024 1:09 am
by turbothis
oh boy i made it angry again