This is on a okuma howa lathe with Fanuc 18iTB the G84 will feed in but then just sits there and will not reveres out? any help would be great. Thanks
This is on a okuma howa lathe with Fanuc 18iTB the G84 will feed in but then just sits there and will not reveres out? any help would be great. Thanks
Post the actual NC code that you used...
Might be the code needs a little tweak, someting on the G84 line.
Ie G97Sxxxx, G98/99, maybe the machine doesn't have the tapping option... check this first
Thanks for the reply. heres the code
G0T0909
G50S2500M8
G97S300M3
G57
X0Z.15
G99
G84Z-.5R0F.037
G80
G0Z6.M9
M1
I'm going to put ideas up that you need to verify from the programming book
... G57 ( lathes normally only need none (or one) programing origin, it may be hanging on this) (omit it to test)
... R0 ( retract plane may not be allowed ? Try omitting the R0 )
... F0.037 ( query, what imperial thread is 27 tpi ? )(¼" grease nipple?)
If you single step your program, your machine will stop processing code on the offending line. The run buffer could read 4 (or more) lines ahead.
Cannot see anything else that could be an issue
Other than G84 is not a function on your machine.
Superman, G57 works fine, use G54-G59 all the time, I do both ends of a part a lot. Tried dumping the R did not help and yes the feed is for a 1/8-27 NPT , I have all the hole making cycles G83 etc. well thank you for your effort.
Few questions, I assume you want to tap on X0. centre line with the main spindle !!!
Did G84 work before, .... can you do it with a live tool (G184) ??
If nothing works you can use a ER collet with axial compensation.
E.g. the Fahrion CET32-GB has a ± 10mm ( ½" ) compensation, you can use the spindle stop M5 and reverse with M4.
You have to drill a bit deeper than tapping because the rpm of the chuck creates a bit extra Z-value before the chuck stops.
They are available in sizes ER11 to ER40 collets.
Heavy, you assumed rite just like the program shows, this machine does not have live tools just a plain 2 axis lathe. and yes I am tapping with a sponge holder and a G32 and that works, I was trying to find out why the G84 does not work, this is a new to me machine so I don't know if this cycle ever worked. it just seems weird that it will do half the cycle (tap in) but will not reverse out ? and no I'm not trying to Rigid tap. it must be waiting for a signal or something, I don't know? thanks' for the reply
Okay, it's possible it doesn't work.
I had a double spindle - double turret with Fanuc 18i-TB and the G84 didn't work on the spindle (centre-line), I had to use the G184 with live tooling.
In the 18i-TB manual there's a G84, probably the machine builder didn't activate it, or probably not set by an "option parameter" .
We still have a 2 axis Fanuc-0T lathe and on centre-line I use these Fahrion ER-collets with axial compensation, it works fine.
Heavy, thanks' for the reply, yeah I looked at "that parameter" and it's on and like I said the G83 etc. works so I don't know what it is. anyway I'm making parts with the G32 (maybe I'll make a macro and call it G84 so I can sleep at night) If I ever find out what it is I will post It. thanks