Found this at www.I-Logic.com on the "About Us" page, right side, half-way
down. Good site for many CNC related things. Hope it helps.
Robert T. Callahan
Greene, Tweed & Co.
CNC Programmer
Corporate Manufacturing
[EMAIL PROTECTED]
A taper thread milling custom macro
by Mitchell Callan of Fuller precision Inc.
I have written a macro that machines a taper thread with a single point
thread milling cutter. This will help anyone that doesn't have a true pipe
thread mill. Also, it forms a spiral motion, which is necessary for taper
thead milling even if a true taper thread mill is used. It will cut any
pitch or size of pipe threads
In main program:
G65 P9000 U0. W0. A.375 R5. E10. Z-.5 V18. F10.
O9000 (PIPE THREADS)
(U IS X LOCATION)
(W IS Y LOCATION)
(A=STARTING RADIUS)
(R=NUMBER OF MOVES PER CIRCLE)
(Z=DEPTH)
(E=NUMBER OF PASSES [thickness / pitch])
(V=THREADS PER INCH)
(F=FEED)
#3=0.0
#10=360 / #18
#109=#10
#110=1 / #22
#111=0.0625 / #22
#3=#18
G00 X#21 Y#23
G01 Z#26 F#9
#19=#1 + #21
G01 X#19 Y#23 F#9
N2 #26=#26 + #110 / #109
#24=COS[ #3 ] * #1
#25=SIN[ #3 ] * #1
#24=#24 + #21
#25=#25 + #23
G01 X#24 Y#25 Z#26 F#9
#3=#3 + #18
#1=#1 + #111 / #109
IF [ #3 LE 360.00000 * #8 ] GOTO2
G01 X#21 Y#23 F10.
G00 Z1. M09
M99
[EMAIL PROTECTED]
Sent by: To: [EMAIL PROTECTED]
[EMAIL PROTECTED] cc:
i.sdrc.com Subject: [mfg-smartcam] off
topic: npt thread
milling macro
01/19/04 11:22 AM
Hello all,
I apologize for being lazy but, the job is already on the mill and I need
something pretty quick. Do any of you have a Fanuc style macro for thread
milling internal npt with a single point cutter (Micro100 TM-250)?
Thanks,
Randy
=====================================
Randy Rochester
CNC Coordinator - Tool & Die Dept.
Walker Die Casting, Inc.
P.O. Box 1189
1125 Higgs Road
Lewisburg, TN 37091
931.270.3018 ph
931.359.9703 fax
Email: [EMAIL PROTECTED]
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