Prior Scientific OptiScan II ES107, Operating Instructions Manual

Page: 56 / 94

OptiScan II ™
53
The SERVO,b command gives the option for the controller to constantly read the encoder
position (when stationary) and correct for any position drift.
b=4 SERVO on
b=0 SERVO off.
With SERVO off, the axis still moves to its destination positions measured by the encoder
but will not correct for any drift once the destination has been reached.
Command Arguments Response Description
ENCODER none n Reports back as a decimal number (4) if the axis is operating
using the encoder, or (0) if not.
ENCODER b 0 b=0 Disables encoder
b=4 Enables encoder.
ENCODER Z 0,4 Returns whether the Z axis has encoder enabled or disabled.
SERVO none n Reports back as a decimal number the axes that have servo
operation enabled. For example, 4 means Z axis servo
enabled.
SERVO b 0 b = 0 stage moves to destination position (as read from
encoders) and stops.
There is no servo action therefore the focus can drift from
destination position due to external mechanical and thermal
forces.
b = 4 focus continuously reads position from encoders (even
when stationary) and corrects for any drift.
SERVO Z 0,4 Returns whether the Z axis has servo enabled or disabled.
SERVO Z,b 0 b=0 Disables servo specified by Z Axis
b=4 Enables servo specified by Z Axis.
SWZ n o Sets a window of n encoder counts about the current Z
position to prevent excessive hunting when servo enabled.
P e x,y,z Argument ‘e’ indicates encoder position.
If ENCODER,0 returns encoder position at present stepper
position (Use P Command)
If ENCODER,4 Returns encoder position.
This is the same as ‘P’ Command
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com