Prior Scientific ProScan III Manual page 69

Command Arguments
ENCW Axis,n
ENCW
ENCW Axis
ENCW Axis,n
SERVO none
SERVO b
SERVO Axis
SERVO Axis,b
SWS n
SWZ n
P e
SIS none
RIS none
LTTL None
© Prior Scientific Instruments Ltd
Response
Sets the encoder window n for the Axis specified. This can
prevent excessive 'hunting' as controller tries to close the
0
position loop.
Axis can be one of S, X, Y, Z, A
Returns the allowable encoder as a set of four numbers for axis
XYZA
Ie. 0 0 0 0
Returns the encoder window for the axis given
N
Eg ENCW,X
Sets the encoder wind n for the given axis
0
Eg ENCW,x,5
Reports back as a decimal number the axes that have servo
n operation enabled. For example, 4 means Z axis servo enabled,
others disabled.
b = 0 stage moves to destination position (as read from
encoders) and stops. There is no servo action therefore the
stage can drift from destination position due to external
0
mechanical and thermal forces. b = 1 Stage continuously reads
position from encoders (even when stationary) and corrects for
any drift.
Returns whether the individual axis have servo enabled or
0,1
disabled. Axis = S,X,Y,Z,A
b=0 Disables servo specified by Axis
0
b=1 Enables servo specified by Axis.
Sets a window of n encoder counts about the current stage
o
position to prevent excessive hunting when servo enabled.
Sets a window of n encoder counts about the current Z position
o
to prevent excessive hunting when servo enabled.
Argument 'e' indicates encoder position.
If ENCODER,0 returns encoder position at present stepper
x,y,z position (Use P Command)
If ENCODER,1 Returns encoder position. This is the same as 'P'
Command
Set Index of stage. The stage will find the encoder Index signal,
stop and set absolute position to 0,0 Used only when the
mechanical position of the stage bears no relationship to
controller position; i.e. when the stage has been mechanically
R moved during power off.
THIS COMMAND MUST BE DONE ONCE AT INITIAL
CONNECTION OF STAGE TO CONTROLLER IN ORDER
TO ESTABLISH A UNIQUE REFERENCE POSITION WHICH IS
PERMANENTLY REMEMBERED BY THE CONTROLLER.
Restore Index of Stage. Used to restore accurate mechanical
Position by seeking index signal and returning back to controller
R
position. This is used to re-establish mechanical accuracy by
referencing back to the encoder index signal.
returns a pair of integers h,l representing the latched TTL
transitions of TTLIN0-3 since the last time it was
called.
h,l
Ie A response of 8,1 indicates TTLIN3 went high since last
called, TTLIN0 went low.
Version 1.12 June 2017
ProScan® III Manual
Description
Page 67