I have a 1746 HSC i am setting up on a machine, all is good, i am seeing counts, controlling the loads fine, however after a couple of min's i am eather losing counts or gaining.
Full scope
1 ab frequency drive turning 2 cams, each cam has an eletrical (24vdc) clutch
2 Automation direct quad encoders, 360 counts
seperate 5vdc power supply for encoders
lead length of encoders is about 2-3' (using the cable that came with the encoder)
High speed counter is set to ring type
i home the system running the drive at low low rpm (2hrz)
after home is found i can run the machine with clutches disengaged and see no extra counts coming on the encoders, so i have effectivly ruled out noise. (???)
once i engage the cam clutch the machine works great, if i stop within a min or so and check home i am bang on, if however i let the machine run for 5 mins or so then check home i am way off..(i set the cam back to home and my encoder is reading 200 or sometimes 300)
In my config i have left it as x1 seeing as the 360 count suits my purpose well.
i see this happenening on both encoders...
should i regret the AD encoders?
I am sitting here thinking that i might have some noise on my 5vdc power supply line....
any suggestions??
thanks
Darren
Full scope
1 ab frequency drive turning 2 cams, each cam has an eletrical (24vdc) clutch
2 Automation direct quad encoders, 360 counts
seperate 5vdc power supply for encoders
lead length of encoders is about 2-3' (using the cable that came with the encoder)
High speed counter is set to ring type
i home the system running the drive at low low rpm (2hrz)
after home is found i can run the machine with clutches disengaged and see no extra counts coming on the encoders, so i have effectivly ruled out noise. (???)
once i engage the cam clutch the machine works great, if i stop within a min or so and check home i am bang on, if however i let the machine run for 5 mins or so then check home i am way off..(i set the cam back to home and my encoder is reading 200 or sometimes 300)
In my config i have left it as x1 seeing as the 360 count suits my purpose well.
i see this happenening on both encoders...
should i regret the AD encoders?
I am sitting here thinking that i might have some noise on my 5vdc power supply line....
any suggestions??
thanks
Darren