Need Help!- Bar Pull on Fanuc 15T

[bmlw]

Hello, Need some assistance. I have been running my DAEWOO Puma 8HC3A in one part at a time mode. So far so good. Machine is realy nice especialy as it is used. Now the difficulty I am running into is that I have some jobs that require a bar pull as I have 1200ea to make for each part.
I have a Hardinge JC100 bar puller and have written the following code for it bet as soon as the control gets to the M69 and uncleams the spindle collet it stops and goes no farther.
The code I am using is as follows

N1(.437 BAR PULL-HARDINGE PULLER)
T0606M5
G0X.8Z-.622
X0
M69
G4U2 (delay for the collet to open)
W.467
M68
G4U2 (delay for the collet to close)
X.8
Z.1
G28U0W0
T0600
M1

Any assistance would be graetly appreciated.

[CNCRim]

You need tell the machine switch to feed per minute.


M69
G98 <-----
G4U2 (delay for the collet to open)
G1W.467F20. <------
M68
G4U2 (delay for the collet to close)
G99<--------

[bmlw]

Thank you,
I knew it had to be something easy.
I will try this as soon as I can.

[bmlw]

On a side note I am also trying to use gang tooling to minimize the cycle time. I am using T0101, T0111,T0121 and T0202,T0222.
I set the Offsets to 0 (ie.T0100) before calling the next tool but the unit is not changing to the new offsets. I have not found much about gang tooling but the reference manual indicates I can call different offsets for the same tool position. If you have any insioghts to this it would be very helpful

[CNCRim]

I found same tool with different offset is not that helpful to me, except when getting lazy to edit the program for groove is smaller/bigger than program intent, otherwise I don't see must use.

[bmlw]

Appreciate the input, however with a tool change cycle of anywhere from 3 to 7 seconds and 6 toolchanges per part on 1200 parts (each part should only be about a 30 sec cycle), I think the time savings would be conciderable, so I am still looking for answers. As to the original question I psosted, I have come to the realization that my problem may lie with the machine itself and not so much with the program. I think that the controller is looking for a collet open signal and it is not seeing it. I have come to this conclusion since the chuck closed light remains lit all the time. I am asking for assistance from the local DAEWOO dealer on how the proximity switches are supposed to be set up on the hydraulic cylinder.

[John_B]

Originally Posted by CNCRim I found same tool with different offset is not that helpful to me, except when getting lazy to edit the program for groove is smaller/bigger than program intent, otherwise I don't see must use.

Why would you take the long, time consuming route versus the quick flexible one?? Using multiple offsets for one tool can save ALOT of time in set-up and long production runs, and if you run multiple machines one program can work for them all and easily and quickly be adjusted to the dynamics of the machine being ran (instead of re-programming for each machine, which may wear and change over time).

bmlw,
Obviously getting with Daewoo is the best source of info, but I'll check on Monday how the multi offset is working in my programs for my shop. I haven't taken a look at my lathe programs for quite a while (they were programmed with long range flexibility in mind, instead of re-programming every week), so I don't recall right now from the sofa how I have them working.

I can't imagine trying to correct for dimensions for your multi tool in one position without using an offset for each. That would be a brain drainer there!

Rgds,
John B

[bmlw]

John B,
Thanks that would be a great help. Right now I am fighting another problem. In the bar pull sequence I have run into another glitch that is probably due to having a used machine. As soon as the M68 code opens the collet the process stops. I am led to believe that this is due to the controls not recognizing that the collet is open. I have checked my switches on the Hydraulic cylinder and they both work, however I have a collet clossed light on all the time except when the collet is sensing fully open. I need to check with Daewoo as to how to proceede with this. It is a bit beyond my abillities at this time.

Regards
bmlw

[lyfordln]

If those switches that you mention are on the hydraulic cylinder coolant collector, they do need to be adjusted to show open when the collet is open as control is waiting for confirmation that collet is truly open.

[bmlw]

Lyfordin,
Yeah that was where I was heading. So far I have traced the wire wires for the proximity switches back to Connnectors CO2 and CO3 on a FANUC A20B-1003-0240/06B board. Not knowing anything about the proceces inside these boards I must conclude that the chuck closed signal is stuck somewhere in here. This of course was never a problem with the chuck as the machine runs fine so long as it thinks the chuck is closed. It sucks for any bar pulling operation. I hate to go and buy a new board$$$$ without being sure it is in this card and not in the main computer. My jobs are going to have to wait and I am running out of time

bmlw

[John_B]

bmlw,

What Lyfordin is talking about is that there is a user adjustment for the prox switches for open and closed position. This is often mounted on a small sheetmetal plate on the hydraulic draw cylinder assembly behind an access door. Normally is has a screw or two securing it that are in slots, so you have the chuck/collet in open position and adjust the prox sw for that until the light comes on (usually there is a light on the prox switch itself) - then put the chuck/collet in closed position and adjust the prox sw for that until the light comes on.

I have had this adjustment requirement on nearly every lathe I've ever ran - especially Okumas.

Rgds,
John

[bmlw]

Hi John,
Yes the two proximity switches mounted on the coolant collector are what I am looking at. Both of these switches appear to energize (light on) when in proximity with the colar and de-energize (light off) when away from the colar. This is correct.
On my control pannel I have a light that says chuck closed. This light is on at all times regardless of wether the closed proximity swicth is energized or de-energized except at the time that the open position proximity switch is energized. I can remove the closed proximity switch and hold it in the air and then close the collet. As soon as the open proximity switch in deenergized the chuck closed light comes on. This indicates to me that the problem lies in the I/O card and is telling the computer that the chuck is closed at all times.
I think I can get a used I/O card for about $150, but I think i will check with the service department at CNC Machine Services first.
Once I get this resolved I think I will be on track again.

Thanks for the input,
bmlw