Here is some additional info on tuning the drives that Rob sent me then reminded me I had it.
Pin15 on Power unit this needs to be confirmed as i think this is the
one to connect to GND or control 0V common
so the drives will have a common ref for all control signals and analog
in respect to the NC control
if you trace this one back should go off to control or to a GND plate
i will check this out for you tomorrow if you like on other machine
all other connectors are fine
Estop Out
73.2 & 72 this is safe to use in the Estop chain if you wish wire
through it as this goes through a relay on the axis board or run in into
a spare IO on mesa, your call using Estop chain means less wiring
the connector in middle of 73.2 & 72 is other arm side of the relay so
if u meter between them u should find a common arm, and the Normaly
Closed arm. wire as you need. as this relay picks when drive is powered up
Drive enable
id run this through a Mesa IO out or a sep relay off the mesa PWM Enable
if stock on IOs
Setup of Drives
you may not need to do this just depends how much someone has played the
drives
turn the P & I gain pots right down (Counter clockwise) (maybe make a
note of where they are or mark on pot with pen)
it would be wise to remove the motors from the machine for this as the
tacho are on the motor for Z
the X, the tacho is on the pully (unless you are lucky and its on motor)
i would advice putting slide in center and perform the below with
working limit switch or have someone watch to end of slide travel.
To setup Analog Drift
strap the Analog connectors 14 & 56 over (short circuit)
enable the drive (watch for run away)
and adjust the drift pot on the board untill motor stops moving (you can
measure the tacho feedback voltage(pin 13&55.3) with a good meter if you
like should read near 0.000V may drift a little that is fine near as
zero as can)
Tacho Feedback
this setup you could skip but aids in a nice running easy to tune drive
as controls how fast the motor spins per volt of analog input
the tacho should be 20V per 1000rev input
may be 3v/1000rpm not found one fitted with them yet i would check if
you can, may have them written on the side of tacho
10v analog in = 3000rpm on motor
1RPM motor = 0.00333V
10RPM = 0.033v
so
60v = 3000rpm on tacho
1rpm = 0.02V
10rpm = 0.2V
10RPM Is nice slow, user high if you like, i use a lab power supply i
can set voltage to.
John
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