Reverse spindle direction for angle head.

[ProToZyKo]

How can i get a specific tool to go in reverse when drilling/milling/tapping etc on Fanuc 18i TB?
I had a way on a older fanuc, 6m i think, there we had a parameter to change direction on tools.
I have tried searching in the book but can't find any solution.

[stevo1]

M3 spindle CW
M4 spindle CCW

Stevo

[ProToZyKo]

Originally Posted by stevo1 M3 spindle CW M4 spindle CCW Stevo

Haha not excactly what im after Since tapping cycle is only going CW i would need some kind of parameter to make it go CCW, M4 wont do the work, i could make a subprogram for it but would need floating tap for that.

[stevo1]

Lol….I kind of ass u med but you know what they say about that.

Ok you may have to explain what exactly you mean. If you are looking to tap yes you have to reverse the spindle but this is handled with the tapping cycle G84.

G84R()Z()

If your machine has rigid tap you will need a M29 before or in the G84 line.

Stevo

[ProToZyKo]

Originally Posted by stevo1 Lol….I kind of ass u med but you know what they say about that. Ok you may have to explain what exactly you mean. If you are looking to tap yes you have to reverse the spindle but this is handled with the tapping cycle G84. G84R()Z() If your machine has rigid tap you will need a M29 before or in the G84 line. Stevo

G84 is the normal cycle for tapping isn't it? So when G84 Z-10 it will go CW into the hole then CCW out, i need to make it go CCW in and CW out.
Think there's normally a specific cycle for that kind of tapping that we don't have. That's why im looking for a parameter to make T20 go CCW when M03.

[stevo1]

Ahhh..I guess I never really thought about it much as I never had to tap in reverse. A few things. Maybe try starting your spindle with M4 before the G84 tap cycle instead of M3.

A quick look through the manual and I came across a few parameters dealing with spindle control. I did not have a chance to really look into the meaning of them so do your DD before changing. Parameters 5203.1 and 5205.2

Stevo

[ProToZyKo]

I will try some things during the week.
The other machine i worked at you had to push a button think it was named macro, from there you could find all the rotary tools on the turret and then change the direction. Can't find that on this machine, but there has to be some kind of parameter.
On one machine we can't drill reverse but tap and mill, on this we can't tap but drill and mill reverse :S
Could make a macro of it, not quite sure if it would synchronize the spindle, never tried it before.

[Andre' B]

Seems if you just programmed it as if it were a left hand tap it should work, check your manual but I think it may be a G74.

[stevo1]

I did read something about G74 as Andre stated. Worth trying.

Why write a macro if you can just use a M4 before the tapping cycle? The macro is going to do nothing different except use M4 instead of M3.

Stevo

[ProToZyKo]

Had a look at the tapping cycles today.
G84 is only for Z direction, if i remember correctly M4 worked, but not what im after since i want tapping in X direction.
Then i found out that G88 is for X direction, when entering M4 before G88 it would go CCW in and CCW out then do CW stop
So how to get it to go CW out?
Can't find any othet G codes or anything to make it go as i wan't, G74 gave me plane selection error. (i think)

[angelw]

Originally Posted by ProToZyKo Can't find any othet G codes or anything to make it go as i wan't, G74 gave me plane selection error. (i think)

Have you tried selecting another plane. When cutting in the X direction, I can well imagine that you would get a plane selection error, because G74 is left hand tapping, and in the default plane G17, the control would be looking to feed along the Z axis. Try G18, I have the same control on a machine, I'll try it next time I'm there.

Regards,

Bill

[stevo1]

Originally Posted by angelw Have you tried selecting another plane.

Bingo.

Stevo