Broken tong cable on West manipulator (serial #8106) replaced.

Wrist joint with broken cable was replaced with the spare wrist joint, pre-strung with a new tong cable. Tong cable is routed the "new" way (as described in April 3, 2024 wrist replacement), over the interior spacer.

Both East and West manipulators now have wrists with cables routed in this fashion which, in theory should result in longer cable life.

Tong cable in East manipulator #7986 was visually checked and looks in good shape.

Handle cable on #7986 is still routed under the spacer in the wrist and should be replaced with a new cable routed above the spacer next time it needs service.

 November 14, 2024 - Aaron Tam w/ Chad Fisher 

Following ID: 2716   
"Nov. 8, 2024 - Aaron Tam 
Tong cable snapped when attempting to remove multipin connector bracket"

Repair went as follows:

• weighted clip attached to tong return side to tension/keep tapes on pulleys
• Manipulator was pinned from both sides (Pinning from master side first makes it easier to position slave side)
• clamps were used to suspend all tapes and cables near the relay bracket 
• extension tube limit clamps were moved to the top to stop it from dropping when Z motion tapes disconnected
• Z motion tapes/tension adjusting screws taken off master carriage and suspended with equalizing weight ~10+ lbs)
• Extension tube limit clamps and extension tube lowered give space to expose multiplier later 
• Wrist joint and handle removed as a unit 
• extension tube to multiplier screws taken out
• Extension tube raised to expose multiplier - using extension tube to wrist joint positioning clamp to keep it in place 
• Old cable removed
• new cable installed

installation in reverse with spare master handle 

Notes:

Spare master wrist joint was missing gears that connect wrist drums 

• this had to be disassembled and installed with gears from old wrist joint

Handle ratcheting pawl spring was not oriented properly, so this had to be disassembled and reinstalled properly (in the process one spring was lost Part#: A-5800)
 

After waste transfer, I did a SHC field measurement from TH through top flange opening. The general field around manipulator maintenance working area is 550 to 650 usv/hr(0.4 to 0.5 meters above table). some area on work table where target fragile material stayed before have 1.0 to 1.3 m/sv (closing to contact measurement). The spreading of target material dusts deposited on table, and affected the whole cell field in my view. 

 Active trash was placed into an unmarked pail and place in spot 7C of the vault the pail measured 321uSv/hr when removed from the SHC. See attached PDF for details.

 Another pail of active trash was move to the spent target vault from the south hot cell. 800uSv/hr, place in spot 7A see attached PDF for vault status.

On April 2, 2024 the wrist on the SE manipulator of the SHC (Serial # 7986) was swapped with a rebuild unit originally from SW position (serial # 8106). The "new" wrist was a wrist + tong assembled unit with the tong cable being routed if-front of the spacer A-14118 rather then behind as in all previous replacements (see attached pictures). This change was a result of a discussion with Central Research's senior repair technician who informed us that the original routing was incorrect from the factory. This can be seen when inspecting unit we have on-site that are still in the original configuration from the factory as about half are routed one way and half the other.

Rust on S/W silo and cover plate stored at silo area are cleaned up.

Yasmine and I did a rust inpsection on TM4 service cap inide surface and shielding plug surface. No rust has been found. Also, all steel bolts on this surface look fine. The inside of silo held this module are rust free as well.  See attachments

 Dakine is on site to do maintenance on the chiller. The tech requested the chiller to operate.

An inspection was performed on drive systems for both storage vaults (main and mini) by Adam Newsome and Dan McDonald. The functionality was not tested. Overall, nothing concerning was discovered.

Main Storage Vault:

• Chain inspected (OK) and lubricated
• Gearbox inspected - OK
• All drive system set screws checked and tightened (note: chain drive screw slightly loose)
• Sprocket alignment checked - OK
• Limit switches checked - OK
• Emergency close mechanism cable checked - OK

Mini-Storage:

• Chain inspected - OK
• Set screw checked - OK
• Gearbox inspected - OK (need inventory/spare in stock)
• Roller wheels checked - OK

 An inspection was performed on drive systems for the main storage vault by Dan McDonald, Travis Cave and Nadia Jorgenson. The functionality was not tested. Some areas for improvement noted, but otherwise nothing concerning was discovered. 

Notes:

• The wire insulation to the motor is showing wear and tear. Should be replaced in the future. For now was patched with electrical tape, see picture. May be beneficial to add an e-chain for the portion of the wiring that moves when door is opening and closing

• Emergency close mechanism cable should be changed to have a 5/32” Nico Sleeve

• Moving parts still need to be lubricated

• Chain inspected (OK)

• Gearbox inspected - OK

• All drive system set screws checked and tightened

• Sprocket alignment checked - OK

• Limit switches checked - OK

• Emergency close mechanism cable checked - OK

 Roughing started at 12:06. It was believed there was a problem with the compressed air but there was none, TM1 doesn't leak and so you cannot hear that the connection is made.

Bevan Moss wrote:

Roughing started at 12:06. It was believed there was a problem with the compressed air but there was none, TM1 doesn't leak and so you cannot hear that the connection is made.

 Roughing stopped as the module and cover requires modifications that require the vacuum to be opened.

TCS MP1 is started to rough out TM4 and TCS. TCS and TM4 will be under roughing only today and tomorrow. No plan to start TCS and TM4 turbo pumps this time.

With the Turbo pump replaced I have started roughing at 10:48

 Roughing pumps were turned on at 15:23 13/03/2013.

 Roughing on TM3 was started at 11:26am today

 The roughing pump has been started.

 The roughing pumps have been started on the conditioning station. As it is late in the day for David he will make the turbo pump connections tomorrow.

I have been getting a fault on the roof top chiller for the 2 tandem 7.5 ton chillers. I have checked and we have water flow and the temperatures are nowhere near freezing. I believe they are over heating as the fans on that side are not coming on. The blades are free to turn by hand but the VFD controller keeps saying off. I have tried turning it on and off and that also did nothing. I have contacted ESC for further advice.