sophtayl
Cast Iron
- Joined
- Apr 16, 2009
- Location
- Thirlmere, NSW, Australia
Hi all,
its time for consultation with all ye wise folk what may have encountered my problem and can guide me in my quest for inner peace (and stop me going out of my mind )…..
The other day I was milling on the VQC 20/50B and had a minor crash when a job pulled out of the 3 jaw chuck I had mounted to the table. It broke the 12mm cutter but nothing overly horrendous...
Anyway, after resuming, the spindle ramp up time seemed to take a significant while compared to usual...up around the 10 second mark... and ramp down from 3000rpm is taking longer than 12 seconds and I receive an error 251 (spindle controller malf. which is linked to >500rpm difference to setpoint for longer than 12 seconds).
I can ramp up and down with the arrow buttons and it tends to keep up ok, but when I do a spindle start or spindle stop from the upper rpm range, I have issues like the motor isn't slowing down fast enough.(I can regenerate the issue every time)
The orient is also hunting when chasing the final positioning (never happened before but feel this is linked to the motor control circuit.)
At first I thought I may have sheared the key between the motor and the gearbox... Inspected that and it is in pristine condition, as is the gearbox itself..
The literature suggests the motor feedback encoder (PLG) could be the issue so I have tested this also with an oscilloscope (and inspected and gapped the sensor), and while there was a little bit of noise when observed at the motor, the signal at the controller was nice and clear. The amplitude was in the order of 4V (recommended to be 3V, but not sure that this is causing any issues as it is still seeing the pulses in manual.)
It appears that the motor accel and braking isn't getting the right amount of indication/ power to slow down/ accelerate appropriately...
I also checked a number of other things the manuals suggested but haven't found anything out of the ordinary as yet and am at a bit of a loss. (I monitored the drive voltage on ramp up and ramp down and it is above the minimum 180V - was above 200v, also checked the sine waves on the feedback PLG and signal from the spindle encoder at various rpms and no obvious issues there, checked the motor resistance, along with any phase grounding issues and all was fine also..)
There are no errors coming up (other than the 12 second lag issue) but its starting to sound like a card issue in the drive controller (FR-SE).
Has anyone had any similar experiences that could point me in a direction to prove the actual problem before I blow a hole in the budget chasing replacement cards?
Any thoughts/ comments/ suggestions/ WAGs (Wild Arse Guesses) are much appreciated at this point.
Cheers
Mick
its time for consultation with all ye wise folk what may have encountered my problem and can guide me in my quest for inner peace (and stop me going out of my mind )…..
The other day I was milling on the VQC 20/50B and had a minor crash when a job pulled out of the 3 jaw chuck I had mounted to the table. It broke the 12mm cutter but nothing overly horrendous...
Anyway, after resuming, the spindle ramp up time seemed to take a significant while compared to usual...up around the 10 second mark... and ramp down from 3000rpm is taking longer than 12 seconds and I receive an error 251 (spindle controller malf. which is linked to >500rpm difference to setpoint for longer than 12 seconds).
I can ramp up and down with the arrow buttons and it tends to keep up ok, but when I do a spindle start or spindle stop from the upper rpm range, I have issues like the motor isn't slowing down fast enough.(I can regenerate the issue every time)
The orient is also hunting when chasing the final positioning (never happened before but feel this is linked to the motor control circuit.)
At first I thought I may have sheared the key between the motor and the gearbox... Inspected that and it is in pristine condition, as is the gearbox itself..
The literature suggests the motor feedback encoder (PLG) could be the issue so I have tested this also with an oscilloscope (and inspected and gapped the sensor), and while there was a little bit of noise when observed at the motor, the signal at the controller was nice and clear. The amplitude was in the order of 4V (recommended to be 3V, but not sure that this is causing any issues as it is still seeing the pulses in manual.)
It appears that the motor accel and braking isn't getting the right amount of indication/ power to slow down/ accelerate appropriately...
I also checked a number of other things the manuals suggested but haven't found anything out of the ordinary as yet and am at a bit of a loss. (I monitored the drive voltage on ramp up and ramp down and it is above the minimum 180V - was above 200v, also checked the sine waves on the feedback PLG and signal from the spindle encoder at various rpms and no obvious issues there, checked the motor resistance, along with any phase grounding issues and all was fine also..)
There are no errors coming up (other than the 12 second lag issue) but its starting to sound like a card issue in the drive controller (FR-SE).
Has anyone had any similar experiences that could point me in a direction to prove the actual problem before I blow a hole in the budget chasing replacement cards?
Any thoughts/ comments/ suggestions/ WAGs (Wild Arse Guesses) are much appreciated at this point.
Cheers
Mick