Control Functions

There are automated features in the instrument which are either motor-driven or toggled by air cylinders. Table 5 lists the automated functions and the numbers of motor/encoder units, high-resolution (HR) encoders, air cylinders, fiducials, and limit switches required to provide those functions.

 

Table 5: Control Functions.

Stage	Mot/Enc	HR Enc	Air Cyl	Fiducial	Limits
Hatch			1		2
Pr. TV scan	1			1	2
Pr. TV filter			1		2
S-H TV scan	1			1	2
S-H TV insert	1			1	2
C-F TV insert			1		2
C-F TV invert			1		2
C-F TV filter	1			1
Mask select	1			1	2
Mask insert	1			1	2
Mask lock			1		2
Collim. Focus	1			1	2
Flexure contr.	2	2		2	4
Disperser Sel.	1			1	2
Grating Tilt 1	1	1		1	2
Grating Tilt 2	1	1		1	2
Grating Tilt 3	1	1		1	2
Long Cam. Foc	1			1	2
Filter select	1			1	2
Filter insert			1		2
Short Cam. Foc	1			1	2
Filter select	1			1	2
Filter insert			1		2
Totals	17	5	7	17	46