[[Include(WikiToC)]]
=== Service: XY Table
[[Image(xy_table.JPG, 300px)]]
This service is used to control the positioning of the [wiki:Hardware/SubSystems/Sivers Sivers 60 GHz] antenna arrays mounted on the XY-tables in [wiki:Architecture/Domains/cosmos_sb1 COSMOS Sandbox 1]. The XY tables allow for independent movement of each antenna array in the horizontal plane within a 1.3m x 1.3m area, as well as rotating the arrays +/-45° about their vertical axis.
XY Tables:
||= '''Name''' =||= '''Location''' =||= Mounted Device =||
|| xytable1.sb1.cosmos-lab.org || COSMOS Sandbox 1 || rfdev3-5 ||
|| xytable2.sb1.cosmos-lab.org || COSMOS Sandbox 1 || rfdev3-6 ||
Overhead View (''not to scale''):
[[Image(xy_overhead_diagram.png, 800px)]]
Useful usage notes:
* X,Y movement is limited within a 1.3m x 1.3m area.
* The antenna arrays may be rotated +/-45° about their vertical axis.
* The centers of the tables are approximately 20m apart.
* The coordinate systems of the tables are 180° rotated from each other (xytable1 has 0,0 in the "lower-right", while xytable2 has 0,0 in the "upper-left").
* For the arrays to be aligned "head on", the x-coordinate must follow this pattern:
* When xytable1 at x=0, then xytable2 at x=1300
* When xytable1 at x=650, then xytable2 at x=650
* When xytable1 at x=1300, then xytable2 at x=0
* Angles are defined relative to each array.
* Angles toward the "positive direction" are clockwise when viewed from overhead.
* Angles toward the "negative direction" are counter-clockwise when viewed from overhead.
* If the antennas are aligned on the x-axis, then an angle of 0° will ensure the antennas are facing each other.
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=== Usage ===
All the available methods are accessible from the a testbed console via an HTTP API located at `am1.cosmos-lab.org:5054/xy_table`. This API can be interacted with via a command line tool such as "curl" or any script using a "REST client" library.
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=== Get the Current Status & Positions ===
This API call is used to get the current status of the XY-table(s). The response will specify the current movement state of the XY platform and angular rotation systems as well as their current and target positions.
HTTP API Path: `am1.cosmos-lab.org:5054/xy_table/status`
Parameters:
||= '''Name''' =||= '''Decription''' =||= '''Required''' =||= '''Acceptable Input''' =||
|| name || Comma separated list of XY-table FQDNs || Y || (list of XY table FQDNs) ||
Selected response values and their meaning:
* '''xy_status''':
||= '''Value''' =||= '''Decription''' =||
|| Idle || Platform is stopped in the X and Y plane. ||
|| Run || Platform is moving in the X and/or Y directions. ||
|| ''other values'' || Indicate possible error, may require staff intervention if persistent. ||
* '''rotator_status''':
||= '''Value''' =||= '''Decription''' =||
|| Limp || Rotator is stopped but the motor is not trying to hold the position fixed. ||
|| Holding || Rotator is stopped and the motor is trying to hold the position fixed. ||
|| Accelerating[[BR]]Travelling[[BR]]Decelerating || Rotator is moving. ||
|| ''other values'' || Indicate possible error, may require staff intervention if persistent. ||
* '''current_position''': The position information at the time the request was issued. Note that this is not real-time and may have up to a 1 second delay.
* '''target_position''': The last requested X, Y, and angle positions.
==== Example 1 ====
Get status of `xytable1`.
HTTP Request:
{{{
am1.cosmos-lab.org:5054/xy_table/status?name=xytable1.sb1.cosmos-lab.org
}}}
Response:
{{{
}}}
==== Example 2 ====
Get status of `xytable1` and `xytable2`.
HTTP Request:
{{{
am1.cosmos-lab.org:5054/xy_table/status?name=xytable1.sb1.cosmos-lab.org,xytable2.sb1.cosmos-lab.org
}}}
Response:
{{{
}}}
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=== Move XY Table Platform ===
Moves the platform(s) to the desired X, Y coordinates and rotates it to the desired angle. The response will be a "status" style response immediately following the execution of the command.
HTTP API Path: `am1.cosmos-lab.org:5054/xy_table/move_to`
Parameters:
||= '''Name''' =||= '''Decription''' =||= '''Required''' =||= '''Acceptable Input''' =||
|| name || Comma separated list of XY table FQDNs || Y || (list of XY table FQDNs) ||
|| x || X-axis target coordinate (mm) || Y || 0 to 1300 ||
|| y || Y-axis target coordinate (mm) || Y || 0 to 1300 ||
|| angle || Target angle (deg) || Y || -45 to 45 ||
==== Example 1 ====
Move the platform of `xytable1` to X=500 and Y=30, and rotate to 15 degrees.
HTTP Request:
{{{
am1.cosmos-lab.org:5054/xy_table/move_to?name=xytable1.sb1.cosmos-lab.org&x=500&y=30&angle=15
}}}
Response:
{{{
}}}
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=== Stop the Current Movement ===
Immediately cancels the last requested movement and bring the platform(s) to a stop.
HTTP API Path: `am1.cosmos-lab.org:5054/xy_table/stop`
Parameters:
||= '''Name''' =||= '''Decription''' =||= '''Required''' =||= '''Acceptable Input''' =||
|| name || Comma separated list of XY table FQDNs || Y || (list of XY table FQDNs) ||
==== Example 1 ====
Stop the current movement of `xytable1`.
HTTP Request:
{{{
am1.cosmos-lab.org:5054/xy_table/stop?name=xytable1.sb1.cosmos-lab.org
}}}
Response:
{{{
}}}