wes.s
Member
I've been struggling with this for a while. I finally had time to play with it.
I've probably replaced every servo motor in this machine at one time and it never was a problem. A while back one axis would lose position when powered down.
Today I noticed that when you power it up, it shows a number fairly close to the one I used to set position. It doesn't matter where I leave the axis at when I power it down.
I've read the thread at http://www.plctalk.net/qanda/archive/index.php/t-68828.html
I really didn't see anything I wasn't already doing other than using motion direct commands instead of using the logic for setting home that the builder wrote for setting position.
Finally, out of frustration I tried another motor from spares. That one keeps its position.
Amp 2094-bc01-m01 Motor MPL-B430P-M from Axis Properties.
The motor I put in is a replacement item, old one had separate brake cable (3 connectors) new one has conversion cable and a conversion y cable. MPL-B430P-MJ74AA.
The old one is a MPL-B430P-MJ24AA
From what I've read, a value is stored in the motor. What is the storage medium? Flash or something battery backed up?
I have another axis with a 560 motor that has the same forgetting problem. I'd like to know more about why this loss of position is happening. I have 5 other axes that I don't want start forgetting things.
Thanks,
Wes
I've probably replaced every servo motor in this machine at one time and it never was a problem. A while back one axis would lose position when powered down.
Today I noticed that when you power it up, it shows a number fairly close to the one I used to set position. It doesn't matter where I leave the axis at when I power it down.
I've read the thread at http://www.plctalk.net/qanda/archive/index.php/t-68828.html
I really didn't see anything I wasn't already doing other than using motion direct commands instead of using the logic for setting home that the builder wrote for setting position.
Finally, out of frustration I tried another motor from spares. That one keeps its position.
Amp 2094-bc01-m01 Motor MPL-B430P-M from Axis Properties.
The motor I put in is a replacement item, old one had separate brake cable (3 connectors) new one has conversion cable and a conversion y cable. MPL-B430P-MJ74AA.
The old one is a MPL-B430P-MJ24AA
From what I've read, a value is stored in the motor. What is the storage medium? Flash or something battery backed up?
I have another axis with a 560 motor that has the same forgetting problem. I'd like to know more about why this loss of position is happening. I have 5 other axes that I don't want start forgetting things.
Thanks,
Wes