Spindle woes

[inertialabs]

Wow that sounds like a big bummer, I have always found it is extremely hard to get all of the magic black smoke back into the circuits after you let it out. I sure would appreciate the break down on setting the parameters for the machine. As I said before it seems like the next logical step to try before I get into replacing things.

My email is

reason.bradley@gmail.com

Thank you

--
Reason Bradley
reason.bradley@gmail.com
415-596-3946

[inertialabs]

I appreciate your advise here, I just got back to Chip Sweeper about this as well. I don't want to simultaneously ask for the parameters from both of you but it sounds like you two are in contact with each other so I will thank you both and watch for an email.

Thanks again

Reason

[machintek]

Attached should be a note I received from Bridgeport in 1996 which lists the parameters Bridgeport was concerned with and what they are and do.
Use the list at your own peril.

George

[inertialabs]

Thanks for the parameters, I fired up the machine and I went into the parameter section and all of the parameters seemed to be very different than what was on the sheet, I am curious as to model machine you have ?

[machintek]

These are NOT the parameters in the BMDC (bmdcprms.sys). These are in the spindle drive. The one with the LCD display and the P and + and - keys inside the electrical cabinet.
I do not have a machine. I have worked on Bridgeports for 25 years. This sheet came from my stash of notes.

George

[inertialabs]

Ok I am a rookie, I get it now.

The parameter page you sent me makes allot more sense now, I went into the cabinet turned on the machine and pushed the P button and scrolled to the PAR 16 and logged the setting which was P 016.1 Then I pushed the + Key and increased the # to P 016.6 and gave a command of 3K RPM and the spindle spun up with no alarm. Then I tried 6 K and it worked perfectly. So I backed the # down to P 016.3 and tried it all over and it still worked perfectly. Would you recommend reducing the # until it fails and then increase it 1 digit or do you have some recommended method of calibration ?

Thanks a million George

I feel like I am getting closer to having a machine that runs

Reason

[machintek]

I do not have that list with me so I do not know what those parameters do. But, they were figured out by an engineer. We never played with them except to change a machine from 4000 RPM to 6000 rpm and then we had the changes given to us. The only parameter we played with was that for the "drift" or balance. This so with an M19 the spindle would be stationary. Any changes you make are temporary unless you tell the drive to store them.

George

[inertialabs]

Well I guess the other approach is to put a real heavy tool into the spindle and just run the thin and see how it does.

From what you are telling me I now need to figure out how to get the new parameter to stay in the controller. It is starting to look like I am going to need another manual for the Siemens drive end of this thing, I will look into that today.

George, Let me just say thank you again for you insight and help here I really appreciate it .

Reason

[machintek]

Clarification. Just changing a spindle parameter will be lost when it is powered down. I believe the procedure includes Parameter 52 and 54. One opens the parameter file, one instructs the drive to write and save. Then back to 52 and close it. If my memory serves me correctly!

George