10.
C addition – Slave axis
Many drives have so called slave axis function available used by mechanics, installers, operators for
slave axis implementation in CNC machines in which single axis is driven by two motors.
This is not always an optimal solution as these both motors work then like they were mechanically
connected.
Why not
? - You can ask.
That's what the function is all about, right?
Let’s say that we have gantry milling machine and the gantry is controlled by two motors, one each
side. If we turn the power off the motors become
"loose”
and the gantry is set in the lowest tension
position. The problem is that in this situation gantry perpendicularity almost never can be kept, so
when we want to mill a square we get a diamond shape. There is no way to correct these
inaccuracies as after we switch the power on - the gantry's both-side drives are like "stuck" together.
In a system based on simDrive™ servo drives and dedicated CNC controller – CSMIO/IP-S the slave
axis function is implemented in a different way namely - the function is done by CSMIO/IP-S
controller. This controller during homing performs special procedure of geometry correction in which
these both-side drives of our sample milling machine gantry work independently – as completely
separate axes. Only after geometry correction is done the both-side drives will be electronically
linked to work as one.
According to the above - the slave axis function implementation in the drive would be pointless. The
function is done by dedicated CSMIO/IP-S controller.
simDrive™ AC Servo Drive -
U
SER
G
UIDE
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