Bridgeport torq cut-22 problems!!

[baystard]

Hey new here found your guys site searching for some help. Hope some one here can point me in the right direction.

Here is the problem I have a 1996 torq cut-22 that was giving me an alarm (spindle not up to speed in time). I worked with a guy over the phone to diagnose the problem and he said something in the motor was bad I want to say the encoder but I know that isn't right because the I have replaced the encoder and it wasn't in the motor. Any way I sent the motor out and had it rebuilt. I put the motor back in today and tryed to start the spindle but get the same alarm. I can turn the spindle by hand and get an rpm reading. So I think the encoder is working but I don't know for sure what it could be. I know the guy on the phone said some thing about a board that goes bad when the motor goes bad. Any way thanks in advance for your help.

Aaron

[machintek]

You are on the right track. 95% of the time that I get that error it is the spindle encoder. It is belt driven to the right side of the spindle inside the head. There are variations. The best ones were made by Heidenhain. The ones I avoid were made by encoder technologies and had a silver can. The high speed spindles had a bearing housing for the pulley to protect the encoder from loads.
The fact that you can turn the encoder and see a spindle speed is very good.
Next try in MDI a S0M3. This will show you the drift in the drive. Anything greater than 2 RPM will give you that alarm and will fail in a tool change as the spindle will drift out of orient position. Even at a spindle speed of 2000, a deviation greater than 20 percent will trigger that alarm. You should have a second or two to see the actual spindle speed before it fsaults out. The screen can display either the commanded speed or the actual speed.
Thus do you have the correct encoder? And do you have the parameters set corrrectly? Both for the encoder resolution, sample rate, spindle gain etc..
Drift is set on the Yaskawa as a parameter. But will get affected by changing the spindle gain parameter 71.

George

[baystard]

Thanks I will try that when I get to the shop in the morning And let you know what happens.

Aaron

[baystard]

Ok I went in to MDI and ran a s0m3. I did it a couple times the first time the rpm jumped up to 17 then down to 3-4 rpm But never set an alarm The spindle just jumped back and forth from a clockwise to counterc clock wise rotation until I hit the e-stop.

I then went in to the parameters and looked at #71 spindle gain perameter. It is set at 3.75634 And in the manual the number shown is 23142. Is this what it should be set at? Any way some of the others are not as the book shows either like #74 is at 1 book says 1875.

I tried to edit them but it asks for a passowrd And I don't have one.

When I was on the phone with some one trying to diag. This the first time I remember him haveing me change or check some peameters but I don't know whitch ones.

Thank again
Aaron

[baystard]

Sorry for the double post.

[baystard]

Well messed with it a little more tonight after work. Still haven't got any thig figured out. I found a password to set spindle orientation and when I tried that I got a different Alarm hi/lo range switch time out during gear change.
I got both of these alarms once before when there was a bad board in the vmc. Do you guys think it could be that agian? Or do I just need to find te password to edit the parameters? Any help would be great.
Aaron

[machintek]

To set the tool change height and orient, the password is:
PASSWORD
in capitol letters.
Novel, huh!

George

[baystard]

I found that in one of your old post But I can't figure out the password to edit the parameters. I don't know for sure that is my problem but the numbers for the spindle gain is no were close to what the book says.

[machintek]

111257

[baystard]

Thank you I am going to the shop here in a few minutes to try to get this thing back up and running. Do you think I should set the spindle gain parameter to the setting in the book? It give me an equation in the book to figure the number but I don't know the values for all the things they want.

Thanks allot
aaron

[machintek]

Parameter 71 sets the spindle gain. So if you command 2000RPM and it is not there, you can adjust this to make it match. Usually I have to change this if a new BMDC is installed.
But if you adjust this, the spindle drift will also shift a bit. Then you have to adjust the Yaskawa. This goes back and forth untill you are satisfied. The spindle drift is more important. It has to be 2 RPM or less. Otherwise the tool change will fault out as the spindle drifts out of orient. Value in the book is a starting approximation.

George

[baystard]

Thaks I messed with it a little bit But now it is not wanting to shift. I was working the other day but know it dives me the hi/lo range switch time out during gear change alarm. This is the same thing it was doind last time there was a bord that went bad in the controler. So I am thinking it might be that again. But I don't know I just wanted to try to diagnose it my self and order the part but I am starting to get frustrated. We will see.

Thanks Aaron