Spindle speed limited

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2 years 9 months ago #290636 by eduard
Spindle speed limited was created by eduard
Hello folks,

I have a spindle with max 60.000rpm. While using with 1000Hz VFD from the vfd software working on max rpm. The vdf is connected throuhg ethercat and I can control all the functions.
But the lcnc max rpm is 32766. In the ini file contains 10-60k rpm. 

Where can I look for additional settings?

thx.

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2 years 9 months ago #290638 by 0x2102
Replied by 0x2102 on topic Spindle speed limited
Post your spindle PID / spindle ini section.

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2 years 9 months ago #290639 by Calysto
Replied by Calysto on topic Spindle speed limited
Using rs485 or analogue signal?  Ethercat.

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2 years 9 months ago #290641 by 0x2102
Replied by 0x2102 on topic Spindle speed limited
Seems like 6042 hex "target velocity" is 16Bit (2Byte).

That would give you -32768 to +32767 if you need forward and reverse spindle speed.

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2 years 9 months ago #290646 by andypugh
Replied by andypugh on topic Spindle speed limited

Seems like 6042 hex "target velocity" is 16Bit (2Byte).

That would give you -32768 to +32767 if you need forward and reverse spindle speed.
 
Yes, that specific number immediately made me think of hitting the 16-bit integer limit.

You might need to command the motor frequency directly and convert in HAL, or possibly send the revs-per-second value from HAL and scale in the VFD. 
 

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2 years 9 months ago #290690 by eduard
Replied by eduard on topic Spindle speed limited
Nice. Yes it is 16 bit. 

"You might need to command the motor frequency directly and convert in HAL, or possibly send the revs-per-second value from HAL and scale in the VFD. "

I take a look at the VFD manual, but I think 0x6042 is in rpm. How can I command it diretly? You mean analog?

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2 years 9 months ago #290692 by 0x2102
Replied by 0x2102 on topic Spindle speed limited
Your XML doesn't matter. If you look at the manual it states that OD 6042h is 16Bit only.

 

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2 years 9 months ago #290696 by eduard
Replied by eduard on topic Spindle speed limited
Yes, I did exatly that. I also look for rps, but nothing found.
What idea did you have for transforming in VFD? Writing a program for it, or with parameter?

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2 years 9 months ago #290706 by 0x2102
Replied by 0x2102 on topic Spindle speed limited
Not sure if there is an option with the EtherCAT interface for your VFD. You might need to go back to analog 0-10V and start, stop and reverse inputs.

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2 years 9 months ago #290754 by eduard
Replied by eduard on topic Spindle speed limited
Yes, I think going back to modbus. Maybe some ethercat modbus converter for beckhoff.

...If I did not get help from omron, maybe firmware update for ethercat hat.

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