The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
--- Quote from: cnc-it on November 04, 2018, 06:55:19 AM ---I had this problem on a Fanuc DC servo which was oscillating at stand still..it turned out to be a faulty servo drive top board (control card).. Encoder faults usually cause alarms and the motor to run away so can't see it being that.
--- End quote ---
No I don't think it's the encoder either, now that the PLC is actually getting the 'on set point' signal and I can monitor spindle rotatio in 0.1 degree graduations via the PLC 'Diagnose' function
mc:
I would of thought the Mentor would have more than ramp settings.
It could be it's running in a torque mode, in which case ramp settings are not likely to have much effect, as torque mode should bypass most of the speed control settings.
I'm guessing you've not got the proper manual for the drive?
awemawson:
Well a bit more aggressive Googling has found me the correct 'Mentor 1' manual - a 'good thing' - All 24 m Bytes of it. :ddb:
https://www.kollmorgen.com/sites/default/files/public_downloads/Mentor%20M3000%20manual.pdf
(Mine is the 6M4Q30MTD at 26.5 kW)
Although I've been adjusting the ramp times, it seems that ramps are not enabled on my drive, and the enable bit is protected by security codes though the ramp values are not
The bad news is that there seems to be a two level security code set to protect certain settings. Level 2 code is 149 - got that one, but the level 1 code is user settable and I have absolutely no idea what it is - only a 3 digit number :bang:
Pete.:
I bet it's 999.
russ57:
Or 000, 111,222,333 etc.
Then 123, 234, etc.
That's 20
Only 980 to go after that!
(a recent presentation I was at plotted bank card pins to a heat map. The 'hot' lines were centred around repeated digits and then 1-12 against 1-30, ie birthdays.)
Russ
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