Differences

This shows you the differences between two versions of the page.

--- commands:si [2017/10/31 20:13] – vik
+++ commands:si [2019/04/18 19:33] – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== Command:SI ======
+This command has two distinct functions depending on whether the system uses linear encoders ''SEARCH INDEX'' or rotary encoders ''SEEK LIMITS''.
+This functionality is available by request from ASI. It is not included with standard firmware.
+--> Linear Encoder and SEARCH INDEX#
+--> MS2000 or RM2000 syntax#
+^Shortcut  |SI|
+^Format  |SI [axis]=[position in 1/10 microns]…|
+^Units    |1/10 microns|
+^Firmware Version Required |v8.4+|
+<--
+--> Tiger syntax#
+^Shortcut  |SI|
+^Format  |SI [axis]=[position in 1/10 microns]…|
+^Units    |1/10 microns|
+^Type    |Axis-Specific  |
+<--
+This Command searches for the physical centers of the stage and marks it with a user inputted value. Software limits are reset to default.
+**Reply** \\
+If there are no errors, a positive reply of “:A” is sent back.
+**Example** \\
+<asi> $ SI X=0
+:A</asi>
+In the example, the controller searches for the center of X-axis and sets it to zero.
+<asi> $ SI Y=20000
+:A</asi>
+In the example, the controller searches for the center of Y-axis and sets it to 2mm.
+<asi> $ SI Y=0
+:N-5</asi>
+N-5, indicates center of axes could not be found. This could be because previous center value is same as the new value, or hardware and software issues.
+<asi> $ SI X? Y?
+:A X=0 Y=0</asi>
+In this example the X and Y axes are being queried for the current setting of the axes centers. The response is what they have previously been set to (not necessarily 0).
+<--
+--> Rotary Encoder and SEEK LIMITS #
+--> MS2000 or RM2000 syntax#
+^Shortcut  |SI|
+^Format  |SI [axis] = [1 or -1]…|
+^Units    |1/10 microns|
+^Firmware Version Required |v8.8e+|
+<--
+--> Tiger syntax#
+^Shortcut  |SI|
+^Format  |SI [axis] = [1 or -1]…|
+^Units    |1/10 microns|
+^Type    |Axis-Specific  |
+<--
+If  ''1'', then the stage seeks the upper limit. If  ''-1'', then the stage seeks the lower limit.
+The stage moves to the hardware limit, backs away 3 mm, then approaches the limit slowly enough to maximize repeatability of the result. The recommended procedure is as follows, with ''SI'' and ''HERE'' commands using one or more axis arguments:
+  * Send SI command.
+  * Poll with STATUS command until ‘N’ is received.
+  * Send HERE command with desired real world position.
+**Reply** \\
+If there are no errors, a positive reply of “:A” is sent back after issuing the command. If an error occurs during execution it will be reported then.
+**Example** \\
+<asi> $ SI X=1 Y=-1
+:A</asi>
+In this example the command is issued to seem the X axis positive limit and the Y axis negative limit.
+<asi> $ SI X? Y?
+:A X=0 Y=0</asi>
+In the example the X and Y axes are being queried for the current setting for the direction to seek the limits.
+** Auto Homing For Clocked Devices like Sliders ** \\
+As of firmware 9.2l (for MS2000) and 3.18 (for Tiger) Seek Limit  routine performs an additional step for clocked devices. After finding the Limit it moves a set distance (distance is specified as Home Position [[commands:sethome|Command:SETHOME]]) and zeros itself there. By default, the distance between Upper limit and Slot 1 is saved in Home position , so when Seek Limit is run , the controller is able to move the slider to position 1 by finding the limit and moving a set distance from it.
+<--
+{{tag>commands tiger ms2000}}

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