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How to adjust PreVERT pitch ALONG the beam

ENCODER: http://082f-bcs.blcs.elettra.trieste.it/blcs/CENTRAL/SM2/EDA2_20/1ADC1?ACTION=GET

SM2--- [0] (EDA2_20) Piezo controller----[1] (1ADC1) 1 posit. range

NOTA: Encoder deve stare tra 0 e 150 V, possibilmente attorno a 75

Old position=25 mm (micrometro lungo la linea), Prevert pitch=248. Encoder=8 V
intermediate movements
24.6, pitch=308, -1.4V
25.8, pitch=58.4 33V
26.6, pitch=-137, 60.9V

dopo alcuni mesi il pitch va a -475
25, pitch=-200, 44.67
25.5, pitch=-150, 63.3

Now=25.5 mm, Prevert pitch=-130. Encoder=60 V

Sulla scala nera ci siamo mossi di 8 tacche (da 25 a 26.6).

OLD Micrometro prevert pitch dentro hutch (lungo in fascio): 26 mm (9/12/2009). Era: 23 mm il 8/12/2009. Da 26 a 23 il preverpitch si e' spostato di circa 600 micron verso valori piu' bassi (da oltre 400 a -186).

15/02/2016  Micrometer position: OLD  27 (scala nera) --->  NEW 25.3 (scala nera),  
                       Pitch prevert: OLD  <-480 (encoder >100 V)  --->  NEW   40 (encoder 38 V)

08/07/2016  Micrometer position: OLD 25.3 (scala nera)---> NEW 27 (scala nera)                   
                       Pitch prevert: OLD 310 (encoder -1.4V) ---> NEW -113 (encoder 57 V)

Last Updated on Friday, 08 July 2016 11:49