Difference between revisions of "E-Detector Motion System"
From PolWiki
Jump to navigationJump to search| Line 23: | Line 23: | ||
#Acceleration Unit: in/s^2 | #Acceleration Unit: in/s^2 | ||
#Gear Ratio: (GR) = 25:1 | #Gear Ratio: (GR) = 25:1 | ||
| + | |||
== Operation == | == Operation == | ||
| Line 44: | Line 45: | ||
-1.0000 | -1.0000 | ||
00000000 00000000 | 00000000 00000000 | ||
| + | |||
| + | |||
| + | == Controller Settings == | ||
| + | |||
| + | We shall maintain two files for the controller settings | ||
| + | * one, having the [[Media:Edet_motion_controller_settings.txt |most recent settings]] | ||
| + | * second, having the last working settings | ||
Revision as of 09:19, 25 August 2010
Introduction
- The electron detector is connected to the QWAD using the custom made Flex-cable. The detector is placed inside the vacuum-can whereas the QWAD is placed outside using appropriate flanges used between the Flex-cable and the QWAD. The connection between e-detector and the QWAD (if the vacuum - can was transparent) can be depicted as in the attached picture.
- The electron detector vacuum - can has a motion mechanism to allow us to move the detector vertically in and out of the beam along with the ability to rotate the detector facing the beam. A schematic view of the assembly can be seen here.
- We are using a stepping motor identified as KML062S04 for vertical motion ( data sheet ) of detector using a MDC accuator ( specifications ). This motor is being controlled by a single axis IDC Controller (User Manual)
- Motion Controller:
- Vertically downward motion of the actuator is referred to as 'positive' direction based on the current settings of the controller.
- All numbers displayed on the controller uses appropriate units of inch and second
- The Actuator has 3 physically verifiable positions which correspond to a switch on the actuator.
- EOT+ (end of travel switch in positive direction)
- EOT- (end of travel switch in negative direction)
- Home
- Current Controller Settings:
- Current: 1.5A
- Resolution: 18000
- Inductance: 16 mH
- Direction: positive
- Distance Unit: inch
- Velocity: inch/s
- Acceleration Unit: in/s^2
- Gear Ratio: (GR) = 25:1
Operation
At EOT- (physically top most) the actuator position read back (as seen on the controller display) is
-3.7833 00000000 00000000
AC.02 VE.1 DA2 GO
+2.0000 00000000 00000000
AC.02 VE.1 DA1 GO
+1.0000 00000000 00000000
AC.02 VE.1 DA-2 GO
-2.0000 00000000 00000000
AC.02 VE.1 DI1 GO
-1.0000 00000000 00000000
Controller Settings
We shall maintain two files for the controller settings
- one, having the most recent settings
- second, having the last working settings
