Motor issue, posted by Ronic Chiche at Optical room about mechanics | detectors and electronics
|
Today again, same problem with axis 9 blocking the controlling software during the mirror alignment procedure.
after opening the motor 9-16 controlling crate, we saw 2 screws (RX- and TX+ of the controller) which were badly screwed.
we firmly screwed them... could it be the cause ? |
Smaract motors parameters and controller, posted by Ronic Chiche at ThomX igloo about mechanics | detectors and electronics
|
current Smaract motors parameters :
- Closed loop Max frequency : 5000
- Signal Amplitude threshold : 2047 |
|
test des vérins ISP , posted by Ronic Chiche at Optical room about mechanics | cabling | software
|
* les vérins de 20mm (axe Z) ont été testés sur table grace à une rallonge SUB-C - DB9, au chassis ISP et au soft
SUPERVISEUR écrit en labwindows CVI par Didier.
pour rappel, la course soft va de -1 650 000 à +1 650 000 pour 20mm de course, soit 0.6mm pour 100 000 de course soft. |
test des vérins ISP , posted by Ronic Chiche at Optical room about mechanics | cabling | software 
|
Ronic
Chiche wrote:
* les vérins de 20mm (axe Z) ont été testés |
|
test des vérins ISP 20mm et 6mm, posted by Ronic Chiche at Optical room about mechanics | cabling
|
Après avoir utilisé la chaine : driver ISP - cable ISP DB9 - Feedthrough enceinte DB9-DB9 - cable perlé DB9-SUB-C - Capsule SUB-C,
l'ensemble de tous les vérins 6mm et 20mm ont été testés => ils fonctionnent TOUS.
Les vérins 6mm ont TOUS subis un HOME. cette commande cherche une fin de course du vérin et le place ensuite en position médianne. |
|
test des vérins ISP 20mm et 6mm, posted by Ronic Chiche at Optical room about mechanics | cabling
|
Ronic
Chiche wrote:
Après avoir utilisé la chaine : driver ISP - cable ISP |
|
Remontage mécanique, posted by Ronic Chiche at Optical room about mechanics
|
Mail de Yann du 12/10/2018 :
Je vous fais le bilan des actions effectuées :
1/ La mécanique a été remontée avec changement des billes céramiques, soufflet défectueux, ect... |
|
Remontage des vérins, posted by Ronic Chiche at Optical room about mechanics
|
Mail de Yann du 8/10/2018 :
Bonjour,
Tous les vérins sont maintenant OK ! Merci Ronic. |
|
Motors connexions, posted by Loïc Amoudry at Optical room about mechanics
|
Motors are connected. The true mirror's name are P1 for injection mirrors, S2, S3 and P4. (S=spherical, P=planar).
They are still some old schemes (and notations on the cavity) which mention M1, M2, M3 and M4. I make the link here:
M3 = P1 |
|
Motors Z axis reversed, posted by Loïc Amoudry at Optical room about mechanics
|
S2 and S3 z-axis are initially at 1/4 (5mm/20mm) of there range over ~20mm range. This is meant to be able to spread them up to ~15mm in case of
thermal effect.
Actually, they are in an opposite position. Means that they can only be spread of 5mm from the initial position. |
|
Motors Z axis reversed, posted by Loïc Amoudry at Optical room about mechanics
|
All Z motors (for P1, S2, S3 and P4) have been initialized again with a proper HOME command with their own controller with the "superviser"
software (which means they all moved to the +1650000 position).
Thus, they have been moved to their default position : +825000 for spherical mirrors (S2 and S3) and -825000 for plan mirrors (P1 and P4). |
|
Pneumatic valves, posted by Loïc Amoudry at Optical room about mechanics
|
| Frederic and Manu from vacuum group came this morning to fix again the pneumatic valves which had a leak again. |
|
First Lock with 2nd satge of amplifier : Motor issue ? , posted by Ronic Chiche at Optical room about mechanics
|
Global locking almost clean : tranmission and reflection are quite noiseless except the peaks at every 500ms.
During the amplifier 2nd stage lock, we experienced 2 strange behaviors :
- short "unlocks" every 500ms exactly all the time, during the whole lock process |
|
First Lock with 2nd satge of amplifier : Motor issue ? , posted by Ronic Chiche at Optical room about mechanics
|
The 500 ms noise disapeared. We had to disable the "power save" mode of the smaract translation stage. AND turn OFF and ON the controler box.
Ronic
Chiche wrote:
Global locking almost clean : tranmission and reflection are quite |
|
Documentation about mechanics on Atrium, posted by Ronic Chiche at ThomX igloo about mechanics
|
https://atrium.in2p3.fr/0dded51a-1cb0-43e6-ae0d-626cd5db7078
a lot of schematics regarding the FP cavity are stored by the mechanic group on the Atrium repository. |
|
Finding correct motors position and parameters to keep the lock during a move, posted by Ronic Chiche at ThomX igloo about mechanics
|
this morning, I try to find a new region for MOT.03 and MOT.06 where we can move them without unlocking the cavity.
I started from the position:
MOT06 : ~ -785 000 |
|
Finding correct motors position and parameters to keep the lock during a move, posted by Ronic Chiche at ThomX igloo about mechanics
|
this morning with Daniele, we did a quite long run with this motor position and it seems we don't lose the lock too much.
the motor positions are:
MOT.03 (M4): -186 500 steps |
|
Cavity Alighnment , posted by Manar Amer at ThomX igloo about lasers and optics | vacuum | detectors and electronics
|
Today, we prepared lenses for a telescope for the CW laser injection into the cavity, yet to be installed
Image of the transmission at P4 attached, an estimation of the beam size of the mode see is ~ 5.5 mm
The vacuum in the 2 optical cavities is decreasing but slowly. today it is 2.6 - 2.4 * 10^-7 mbar |
|
Cavity at atm pressure, posted by Loïc Amoudry at Optical room about lasers and optics | vacuum
|
Dry air injected into the cavity.
Lock has been proceeded without any trouble. ~~4000 finesse. Considered to be the same than before.
x and y motors axis put back to the last "cavity at air" position. z position kept at maximum distance between spherical mirrors. |
|
Cleaning outside IP cavity, posted by Loïc Amoudry at Optical room about lasers and optics | utilities
|
From 7th january to 11th january.
|