ES-L8 Hard Limits

[big_mak]

Good day,

Yesterday we got our 2004 ES-L8F wired up, and messing around, I managed to run it onto the hard limit in X. Kicker is this machine has a Fanuc 21iT on it, so the manuals for each are pretty useless.

Any Idea how I go about getting it off the limits?

last night we went into the back, and loosened the switch and ran it back.

Any more easier solutions for the future, aside from don't do it in the first place!!!!

[Tumbleweed Tim]

Probably needs to be asked in a Fanuc forum. I ran mine up in X one time. I have Okuma control and had it fixed real quick, and I can't remember how but I am sure there is a way to do the same thing with the Fanuc control. I recall not having to undo or molest anything but putting it into a mode with like a key or something and using the hand wheel to back it off the switch.

[big_mak]

I tried the usual tricks like reset adn cancel at the same time, but nothing that would temporarily get rid of the e-stop condition to back it off the switch.

Getting it off the soft limit is a pc of cake just wind it off and reset to get rid of the alarm!

It's the particular key strokes to engage the servos long enough to wind the damn thing off that I'm missing!!!!!

Thanks.

[Tumbleweed Tim]

Memory Jog.
Power off.
There is a small switch inside the cabinet (lower left) that you set to on position, then close cabinet, power up and turn on control. Then you are able to use only the hand wheel to move the axis very slowly. Then power down, open cabinet reset switch and power back up.

[big_mak]

TT,

would that be Switch SA5N???????

That's WTF that switch in no man's land is for.

I can't wait to get this mother running and making parts for us.

It's full of wood dust that we want to get rid of before we charge the coolant tank and start raking in the $$$$$$.

I will give that a try then next time it happens!!!

[Tumbleweed Tim]

I am not near the machine right now so I don't know about what number it is, but it sits down low on the left all by itself. Small little black switch.
Write down the max Z,X machine numbers so if you change the soft limits you can just key in that number to get back to max travel. There is a max X negative and Z positive I use that clears tail stock when it is all the way back. I shorten the stroke most programs to save time. Nice to have those soft limits.

[theokumaguy]

I believe SA5N is the overtravel release for Okuma only. If you overtravel the 21i you should only have to hold reset in to allow pulse handle movement of the axes to move off the overtravel. If this doesn't work then it would be the same as the Okuma, flip SA5N, reset, move off the overtravel, then flip SA5N back to it's original position.

[big_mak]

Okumaguy,

I tried the reset thing to no avail. Getting off the softlimits is no problemo, it is soley the hard limits where I had to undo the switch and move and replace the switch. I'll try SA5N when it happens again.

Now could you tell me how to hcange the chucking from Outisde to inside, and select no tailstock option for running in automatic mode?

It's no big deal right now, cause the machines in 100's of pieces as we try to get all the sawdust out of it!!!

[theokumaguy]

Interesting that holding reset doesn't bypass the overtravel, I will have to throw that note out and find some hard info on that one later. For "Tailstock spec off" try keep relay K03 bit 1 "TSTOCK", 0 for Tailstock spec off and 1 for Tailstock spec on. For chuck gripping try keep relay K12 bit 4, "P.C.CHR", 0 for OD chucking and 1 for ID chucking.

[big_mak]

Thanks.

I'll have to dig up those parameters.

The problem with this machine is that fanuc control, so none of the manuals really apply.

Maybe Okuma over rode the Rest thing because they have that switch in the back, just to keep it consistant with other Okuma's.

Thing is I suspect people that spec'd a Fanuc, do it because they are affraid of the Okuma Control!!!

Me, I just got a decent deal, and have to work out the idiocincracies(sp?).

[theokumaguy]

The manuals are layed out differently for the Fanuc models. The keep relays are described in the Operations and Maintenance manual. However if they did not supply the manuals for an ES-L8F then you need to call your local Okuma distributor and request those manuals (the OSP U10 style machine was just an ES-L8, so specify that it has the F for Fanuc and they'll find the info). There should "at least" be electrical drawings, Operation, and Operation & Maintenance pertinent to your Fanuc based setup. If they cannot find the documentation let me know and I'll see if I can borrow my friend's manuals to copy out the Keep relays section, those are not usually described well, as well as the EX type alarm listings for that machine.

[big_mak]

I will try that.

The manuals that were supplied with the machine were for an OSP5000 Useless to me, and the Fanuc 21iT manuals, nothing specific for this Fanuc Based Okuma.

Glad to see that I have at least someone's brain to pick regarding this thing.

Thanks for the assistance