BWSMeetingMinutes07July2015 < BWSUpgrade

BWSUpgrade Web>Meetings>BWSMeetingMinutes07July2015 (2015-07-30, unknown) (raw view)
---++++ *Minutes BWS Upgrade: Electro-Mechanical Design Meeting #2* *-- 24<sup>th</sup> July 2015 --*

<b>Participants: </b>Bernd Dehning, Raymond Venness, Dmitry Gudkov, Jonathan Emery, Pierre-Jean Lapray, Luca Timeo, Jose Luis Sirvent

*Agenda (* [[http://indico.cern.ch/event/435233/][ *http://indico.cern.ch/event/435233/* ]] *) :*

---++++ 1. Communications
   * The new optical disk fixation has been tested, observed imperfections on holder, the piece needs to be re-machined.

---++++ 2. Follow-up Open Actions
   * No remarks on follow-up open actions
---++++ 3. Motor Selection (D.Gudkov)
   * From 6 Companies contacted for motor procurement 3 are interested (Alxion, Kollmorgen, Parker)
   * Quotation from Alxion and Kollmorgen available, waiting for Parker quotation.

   * 4 Possible motors compliant with our specifications
      * Alxion: *14S5TX2M (short) & 14S5TK4M* (long)
      * Kollmorgen: *KBM-35x02*
      * Parker: *NK620*

   * Motors delivery times (needed to consider holidays):
      * Off the shelf à *7 Weeks*
      * Custom models à *10 Weeks*

   * Main Differences Custom vs Standard:
      * Saladium Cobalt magnets (and it’s fixation for vacuum compatibility, no glue)
      * Increasement of *Air Gap* by machining stator (*0.5 to 0.7 mm = 10 to 20% torke decreasement* “ETEL”)

   * <u style="background-color: transparent;">Open question: Spares politicy?</u>
      * Buy a big amount of spares once VS Trust on companies availability guarantee
      * All contacted companies are relatively “Big”, production guaranteed for many years
      * *Decision not taken here*.
---++++ 4. Electrical Requirements and test setups (J.Emery)
   * <u>Motor Study:</u>
      * Motor 14S5TK4M (long) deeply studied by Jonathan in terms of torke, speed and performance for SPS, LHC and PSB.
      * This motor would experience acceleration *issues for the LHC configuration* .
      * Longer active length improves torke.
      * Exist two versions of this motor (For torke and for Speed).
      * This motor is *not suitable for 200rad/s* , no torke is achieved at this speed, meaning that constant speed is not guaranteed. However, 140rad/s would be fine (but it’s slowlier than specified for the BWS).
      * The motor consists on 12 poles (Initial Parker motor had only 4), which means higher di/dt variations, moreover it has a very high inertia.

   * <u>Requirements:</u>
      * BWS Prototype:
         * <b style="background-color: transparent;">A mechanical piece is needed to keep the shaft in “Home position”, acting as angular reference </b>to align properly the fork, motor stator/rotor, resolver, break and optical disk.
      * BWS Calibration Bench:
         * Both *Linear stages* must be on the *same orientation*
         * System needs to be properly aligned horizontally (to work on a table)
         * Fixation of optical parts needs to be defined.
         * *Design needs to be reviewed* Jonathan & Mechanics
         * Proposed the usage of two flanges with identical holes to align *Laser system*.
---++++ 5. Test Planning (B.Dehning)
   * No remarks on test planning
---++++ 6. AOB
   * <u>Discussion</u>:
      * <span style="background-color: transparent;">New Optical disk:</span>
      * New disk sent in September to CERN (a little sample to check quality)
      * Possibility of testing the reflectivity of such disk with the real optical system.
      * Check investigations on disks with micro holes.

   * <u>Decissions</u>:
      * <span style="background-color: transparent;">2 Off the shelf motors + 2 Custom motors to be purchased: Alxion </span><b style="background-color: transparent;">14S5TX2M & </b><span style="background-color: transparent;">Kollmorgen </span> *KBM-35x02.*
      * <span style="background-color: transparent;">Integration with Alxion </span> *14S5TX2M* <span style="background-color: transparent;">.</span>
      * <span style="background-color: transparent;">Two test-benches as flexible as “Juan model” needs to be built.</span>
      * <span style="background-color: transparent;">Tests with original motors and stator machined (bigger air gap) motors to be done</span>

   * <u>New Actions:</u>
| *Action* | *Asigned to:* |
| Investigations on optical alignment (flanges with holes) | William/Jonathan |
| Revision of BWS calibration system | ^ |
| Communication with RF | Bernd |
| Ordering Motors | Dmitry |
| Test-Benches construction | ^ |
Topic revision: r1 - 2015-07-30 - unknown
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