hy osub
i have worked with citizen cincom l12 with mithusbishi cnc, mass-production, setups > 2 months
i like to program the depth of each pass, like this :
Code:
T0505 G99
M3 S1=3000
G0 X13 Z-1
G92 X5-0.28 Z3.5 F0.5
X5-0.28-0.24
X5-0.28-0.24-0.16
X5-0.28-0.24-0.16-0.08
X5-0.28-0.24-0.16-0.08
X5-0.28-0.24-0.16-0.08
G0 X13
T00
M5
last 2 passes are spring passes, thus they don't cut material, but only make the thread look better
in previous code, retraction occurs at X13
also, is good to be able to detect the retracting diameter, without looking inside the code
please take a look over attached image : i have never used that code, by i only shared it, so to show you that i could find informations pretty fast, like in 60 seconds
if you wish for cnc manuals, please share an e-mail in private message; archive is about 32mb
this is a classical problem
thus you have ok from the go&no-go calibers, but the thread does not look ok
there are methods to improve the aspect, for frontal chamfer, back chamfer, and in-between
[ frontal-chamfer, back-chamfer ] : after the threading operation, re-cut only the chamfer, by going down, towards X-; if you wish to improve the aestetich even more, try using a double chamfer, like merging a 45degrees with a 30degrees
[in-between] : also the entire thread aspect can be improved, and the method involves spring-passes, and sometimes also re-cutting the od; what do to depends, if there is used a full-profile-insert, or a partial-type
also, if needed, i program custom infeed patterns
i hope you find this useful / kindly