Okuma MC 4VA with OSP5000M-G ref 0 points

[krilan5]

hi,

We bought second hand Okuma from Switzerland MC 4VA with OSP5000M-G, the seller disassemble servomotor from Z-excel I think maybe to get out the machine.
We do the assembly, however than we had error that we are out of limit, we disassembly the motor again manually go out with the spindle, the error disappear.

Unfortunately the connection was not good and motor was working but not go up with spindle, now I thinking we have wrong limits.

We are looking for how to do zero points and we need also alarm list.

Can somebody help us.
Thanks in advance.

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[OkumaWiz]

Use the PR ZERO OFFSET register to shift your encoder reading. Z zero is normally from the table surface to the spindle face. Use some spacer such as a 2-4-6 block. Enter the difference you are off into the PR register and backup and cycle power. Your new corrected position will show up and you will need to change NOTHING else.

Best regards,

[krilan5]

Use the PR ZERO OFFSET register to shift your encoder reading. Z zero is normally from the table surface to the spindle face. Use some spacer such as a 2-4-6 block. Enter the difference you are off into the PR register and backup and cycle power. Your new corrected position will show up and you will need to change NOTHING else.

Best regards,

Thanks a lot for help, however not sure I understand you corectly.

Now we have situation that from bottom hard limit to upper soft limit we have only 150 mm, acc manual it should be more.

If we can fix in the way you propose can you describe the procedure as for newbie okuma user.

Thanks in advance

[OkumaWiz]

Even though the encoder may have been removed, the limit settings should not have changed. So by moving the machine, the machine will hit the physical limit rather than stop at the variable stroke limits since the "known" encoder position is off.

Basically you need to reteach the Z where it is.

Step 1: Empty the spindle and get rid of any fixture offset by commanding G15 H0 in MDI.
2: place 150mm block on the table.
3. Carefully move the spindle down so that the spindle face touches the top of the block.
4. The Z position should read 150mm. Since it does not, calculate how far you are off. If it reads 175.3 instead of 150, you will need to change the PR ZERO OFFSET by 25.3mm. This can be found in the PARAMETER MODE under SYSTEM PARAMETERS if I remember right. It will generate an alarm something like "Power on effective parameter set"
5. Once the value is entered, press the function key BACKUP or else wait for about 2.5 minutes for auto backup to occur.
6. Cycle power on the machine.
7. if done correctly, your actual position will now read 150mm on Z-axis. You will not need to change the stroke end limits, variable limits, tool change positions, home positions or anything else. If someone has decided to already do this, first slap their knuckles with a steel rule and then go into the electrical cabinet and pull out the Management Data sheet and re-enter the values for stroke end limits that were recorded there. This will re establish the travel limits. (You should not have to do this if PR ZERO OFFSET is used to fix the problem)

Best regards,

[edo209]

hi,
We can't find this system parameter. Where it can be located more precisely?
Thanks in advance

[krilan5]

hi,
We can't find this system parameter. Where it can be located more precisely?
Thanks in advance

@OkumaWiz I think Eddie asked maybe not precize.

During the weekend we move the spindle manualy up, we got reference for tool changing position, we could change the tools.
After the operation we shout down power and today we have the same situation as before see photos.



The position is now upper soft limit







The problem is that we dont know how to change the parameters in the machine, we have the menu in German and no so good manual.

Could you sent by PM any contakt to you e.g. SKYPE or another comunicator.

Came back to machine we have as follow



The position is referance position for tool changing




Should we change something here?

[OkumaWiz]

You are very close but it is not on that page, perhaps one or 2 pages down in your parameters.I think it is on the same page as the Stroke End Limits.Attachment 361598

It should look like this and would be the Zero offset line #6 in this example from an E-100 control.

[Riddersholm]

Sounds like you forgot to press the back up soft key before powering down, if you do not do it, the machine will load the old parameters back into the controller

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