Title: Precision and repeatability of cam-shaft system in both directions (vertically and transverse), measured on undulator ends, for pitch and yaw motion as well. We are shooting for
1What we are trying to achieve
- Precision and repeatability of cam-shaft system
in both directions (vertically and transverse),
measured on undulator ends, for pitch and yaw
motion as well. We are shooting for 5µ - (specification 7µ )
- Precision and repeatability of transverse travel
(80 mm) on linear stages. We are shooting for
10µ - Precision of a K-value adjustment using
transverse linear stages. - We are shooting for 10µ
-
- Short term stability (10 hours) of the cradle and
undulator. - We are shooting for 5µ (specification
5µ )
2What components we need to start a final test
- LCLS undulator substitute (on order). Expected
on 11/15. - New cam-shaft movers (on order) with new gear
boxes (on order). Expected on 11/25. -
- Modified transverse stages with 4 travel (in
house). - Motors (in house) and 90? gear boxes for these
stages (on order). Expected on 10/31. - All transition plates, wedges and supporting
parts (designs are complete, parts are on
order). Expected on 11/25. -
3LCLS new single cam-shaft mover
- New gear box with ratio 2501 is installed.
- Calculation showed this ratio is enough to hold
undulator with the girder in place. - Thats why a motor without brake is used.
4LCLS new double cam-shaft mover
The same changes were implemented in this unit as
in the single cam-shaft.
5LCLS new double cam-shaft mover (detail)
Hardness of the rings on the ball-bearings was
increased from 30-34 Rc to 50-55 Rc
6LCLS new single cam-shaft mover working with V
pad
The flat pad is replaced by one with a V shape
- 16? angle. A double bearing is installed
instead of the single bearing Its purpose is to
replace sliding friction by rolling friction.
7LCLS new single cam-shaft mover
8LCLS new girder after welding
9LCLS new girder after welding (detail 1)
10LCLS new girder after welding (detail 2)
11LCLS undulator on the girder
12LCLS undulator on the girder (left end)
13LCLS undulator transverse motion control
14LCLS undulator on the girder (right end)
15Provisions for the LCLS undulator replacement on
the translation stage
16 LCLS undulator fixed support with the cam-shaft
movers
Courtesy of Sushil Sharma and Bryan Rusthoven
17 LCLS undulator with the girder on the fixed
support and earthquake bracing concept
Courtesy of Sushil Sharma and Bryan Rusthoven
18LCLS lifting table to place the girder with an
undulator to the fixed support
Table data
- Lifting capacity 6000 lbs
- Table size 48 X 32
- Min. height 37
- Max. height 59
19CONCLUSION
- Design of the LCLS prototype alignment and motion
system close to the completion. - Multiple changes were implemented based on the
breadboard test results and experience. -
- New hardware has been ordered and should be in
house before 11/25/05. - Final tests of the alignment and motion system
are scheduled for 01/2006 in the Single Undulator
Test (SUT). - Design modifications will be implemented after
the SUT if necessary and will be included in the
FDR. -