Hi, my 1984 LB15 is making some noise from the draw tube actuator. I'm thinking bearings. The model number is F1546 M55, has anyone got a parts diagram for these so as I can work out the best way to...
Type: Posts; User: WC56
Hi, my 1984 LB15 is making some noise from the draw tube actuator. I'm thinking bearings. The model number is F1546 M55, has anyone got a parts diagram for these so as I can work out the best way to...
A quick update on this thread...there seems to not be a problem now. I was sure it was bearings but when I got a technician out to help me pull it out and send it off to be rebuilt, he didn't agree....
Thanks Deano, just the info I was after. I have a tech looking at the Hitachi next week and will decide which way to go...repair or replace.
Hi, I am considering buying a new Doosan DNM 6700 machining centre and would like to hear the good and bad from anyone who has one. The machine on offer is fitted with the Fanuc I Series (Oi-MF plus)...
Hi, my trusty old 2000 model VS50 has developed some spindle noise. It is equipped with the 4500 rpm spindle and I think the noise is coming from the lower bearing (closest to tool) however it still...
Did you get this fixed?
Thanks John, but I missed the boat on this machine...too much time thinking about it, someone else bought it.
Thank you. I will find out tomorrow if it works
I am looking at another SDU for my old LB15. The units as a whole, have exactly the same part number (A06B-6044-H018) but when I look at the front circuit board, they have different numbers. Mine...
Hi, as the title says, I have my eye on a 1991 Hitachi Seiki Hitec turn 20s11 that has very low spindle hours. I am still checking out the story, but it seems legit so far. Apparently it was...
To add a bit more...I will probably just replace the encoder, but it will need to be tuned to my SDU. Last time my electrican did that he found that one of the pots that sets the sine wave was a...
Hi, several years ago I had an issue with the SDU on my old Okuma LB15. The problem was fixed by replacing the encoder on the rear of the spindle motor. Unfortunately it seems to have failed again. I...
Thanks deadlykitten, ended up adding:
V1=2.71
V2= 25.4/12
at the start of my prog, then
G71X=DX2-V1Z=LZ-LZ3 H=V1D0.3U.07F=V2
in my program...works great.
Hi, I currently have an Okuma LB15 which is a great machine but am looking at a HAAS SL30 (2004) for its bigger spindle & longer turning length. I machine a lot of hydraulic cylinder rods, most of...
Hi, I need to drill a series of 18mm holes through the side of 65nb heavy black pipe. In the past I have done small batches using an ordinary hss bit but my customer has just placed an order for 400...
Glad to hear she is running again...fingers crossed you have nailed the problem. They are a great old lathe & usually very reliable.
Sounds like it may be the same faulty sensor. Mine is still running great...touch wood.
Sounds like it may be the same faulty sensor. Mine is still running great...touch wood.
Update, I fitted a NOS spindle encoder & all is well again. Thanks for helping out guys.
?? any how, I ordered a new spindle encoder...very lucky to fie a NOS one close by at a very reasonable price. Will let you know if this fixes the problem.
Just as a test I divided the error by the number of threads & got approximately 3.07 so ran a little test thread at 3.07...looked pretty close. Yes I believe Z is moving as it should but not when...
Ok, checked block data page while threading at 300RPM & it is displaying 288RPM. I am wondering if this could be a problem. I had issues with the spindle motor speed sensor on this machine a while...
Ok, this morning I checked the spindle speed with a digital tachometer & got the following results:
Programmed spindle speed 500 - actual speed 493.3
1000 - actual 992
1500 - actual 1489
2000 -...
Ok, perhaps this is starting to make some sense. In the past I have had to replace the speed sensor on the spindle motor...I will check again in the morning, but I think when I ran it today the...
Thinking about it a bit more, wouldn't a faulty spindle encoder on these machines effect tracking of the thread more so than pitch?
cheers Bruce
Thanks for your input deadlykitten. I ran the program as you suggested & got the same results. Spring cuts are exactly aligned with the previous cuts.
I checked backlash as Superman suggested &...
Thanks superman,will try this in the morning & post results
Thanks kurmay, yes I did shut it down & it doesn't make a difference.
Hi, my old green screen Okuma LB15 is behaving strangely. I started her up yesterday to cut a couple of threads on a few hydraulic cylinder rods...something I did last week without issue, &...
Hi Casey, have you had any luck getting this sorted? I don't think I have never had the 2055 alarm come up but after searching the net it seems that it should go away after a few minutes following...