fwheel1 / fwheel2 / pstop Commands

This page is part of the ING manual WHT-INGRID-2: INGRID IMPB Software Operations Manual

Usage:	*fwheel1 name* \| wheel_pos \| "datum" fwheel2 name \| wheel_pos \| "datum" pstop name \| wheel_pos \| "datum"**
Category:	Mechanism Command
Description:	These commands move INGRID's individual mechanism wheels to position the required optical components into the instrument's light path. INGRID has two wheels loaded with filters and one wheel loaded with pupil stops. Generally mechanisms should be moved in combination using the filter script to select from one of a number of astronometrically useful configurations. The commands described here are only provided to cater for unusual configurations or unforseen circumstances. The required optical component may be specified either directly by name, or in terms of it's wheel index position. To determine the names of the optical components loaded into the different wheels the wheelcon command may be used. Additionally, these commands provide a means of datuming individual mechanisms. To do so the "datum" argument may be specified. After datuming, the wheel should be moved back to the required position.
Arguments:	The command takes a single argument which may be any of: *name* - the name of the required optical component. *wheel_pos* - the wheel index position in the range 1..N. Filter wheels have 11 index positions, the pupil stop wheel has 12. "datum" - a string literal which indicates that the specified mechanism is to be datumed.
Examples:	fwheel1 k_s - move filter wheel 1 to position containing filter k_s. fwheel2 5 - move filter wheel 2 to index position 5. pstop datum - datum pupil stop wheel.