 Wednesday, April 24, 2024, 09:17, Adam Newsome, T-Hall Crane, Repair, Target Hall Crane: VFD DC bus undervoltage fault [root cause: encoder board failure on 900VFD] 
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On 2024-04-22 around 3:30 pm it was discovered that the crane's main hoist was in a faulted state. The operator (Adam Newsome) experienced the fault
after performing a safety reset and attempting to lower the hoist. There were no visible signs of any issues, mechanically. This fault had not been previously
reported by any other crane operators. The crane was previously unused, sitting idle. Note: the auxiliary hoists appeared to function normally. |
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Wednesday, February 14, 2024, 09:02, Adam Newsome, T-Hall Crane, Maintenance, Target Hall Crane: Trolley Encoder Homing
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The main trolley's E/W motion was observed to be slowed on 2024-02-13.
Upon investigation, the following faults were present:
- 200. Rotating Hook Velocity Difference between SSI Encoder and Drive Speed Feedback |
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Wednesday, August 02, 2023, 09:13, chad fisher, Hot Cell 1, Repair, Leak Rate Testing
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On August 1, 2023 HC1 was pumped down to -1200 Pa (gauge) and then valved off to test the leak rate after turntables had been sealed with backer rod
in the gaps.
The sealing with backer rod allowed the cell to reach the test pressure of 1000 Pa. The cell pressure equalized within 30-40 seconds which is an |
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Wednesday, April 26, 2023, 16:06, Adam Newsome, T-Hall Crane, Maintenance, Target Hall Crane - Hoist Wire Wrapping
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It was observed recently that the main hoist's wires seemed skewed, and there was occasionally some noise heard when raising and lowering the hook block.
It was suspected that this was due to wires having jumped in their tracks at some point. This is typically caused by side loading. It is possible that
wire wrap skew occurred during the incident outlined in e-log 46. |
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Tuesday, April 25, 2023, 12:28, Adam Newsome, T-Hall Crane, Standard Operation, ARIEL Target Hall Crane - Drives Fault
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Today while operating the crane with load, the crane stopped moving. Upon investigating, all safety signals appeared to be OK. Fault messages regarding
drive faults for various VFDs were present, which seemed to stem from an ethernet adapter card fault (see attached photo). It is unknown how this occurred,
but suspected that it was due to a brief blip in network communications or the external drive power supply control signal. It is worth noting that the |
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Tuesday, March 21, 2023, 10:47, Adam Newsome, Hot Cell 1, Repair, Circuit breaker replacement - telemanipulators
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There was an issue with a 20 A circuit breaker used to control motor assist functions for the telemanipulators (specifically, the rightmost CB in the
panel for the right (East) manipulator set). This circuit breaker was moved to the panel for the left (West) manipulator set in the rightmost position,
and then subsequently replaced with a new one, which is functioning correctly. It is suspected that the former CB which was not working was calibrated |
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Thursday, March 16, 2023, 14:41, Adam Newsome, T-Hall Crane, Development, ARIEL Target Hall Crane - Spare Pendant Procured, Tested
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A spare pendant for the overhead crane was procured from COH. The pendant's functionality is the same as the original one's. The pendant was tested today
by Adam Newsome - all functions behave as expected.
Important - to change to the spare pendant in the case of failure of the original one, insert a battery into it, and transfer |
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Friday, January 20, 2023, 14:48, Adam Newsome, T-Hall Crane, Standard Operation, Pendant/Receiver Communication Issue (Repeated)
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An issue was observed in which the pendant did not work to control the crane. This is the second time in recent memory this has happened. See e-log
55 for details. The same sequence of steps outlined in e-log 55 was followed, and the pendant control was re-established. It is still unclear what
the root cause of this issue is, but it is suspected that the crane pendant loses communication with the receiver for some reason, and even though communication |
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Friday, January 13, 2023, 13:57, Adam Newsome, T-Hall Crane, Repair, Crane light (west) not working
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| It was observed today that the crane's west light was not functioning. |
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Tuesday, December 20, 2022, 10:03, Adam Newsome, T-Hall Crane, Standard Operation, Overhead crane powered off for the holidays
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[edit 2023-01-03] The crane was powered back on this morning - there do not appear to be any faults on the HMI and it seems that the crane was unaffected
by the power outage.
The ARIEL target hall overhead crane was powered off for the holidays. In the new year, throw the main disconnect in the crane control room to |
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Wednesday, August 24, 2022, 13:47, Adam Newsome, T-Hall Crane, Standard Operation, Pendant/Receiver Communication Issue
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In preparing to troubleshoot the issue described in e-log #54, the crane was power cycled, and the pendant battery removed, to get to a "fresh start"
state. Prior to this, the crane functioned normally aside from the incorrect E/W direction control on the North Aux Hoist.
Upon powering the crane back on, the pendant did not work to control the crane in any mode. The HMI had a fault present which read "305. Radio |
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Tuesday, August 23, 2022, 10:32, Adam Newsome, T-Hall Crane, Maintenance, North Aux Hoist - reverse motion axes on E/W
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Update 2022-10-06: During routine inspection of the crane, Tom Kauss investigated the direction swap issue. It was determined that there was
likely an issue with the initial installation of the new VFD back in March 2022, and that it was unnoticed (directional control wires crossed). The issue
has been resolved by Tom Kauss and is no longer a concern. |
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Monday, May 30, 2022, 12:58, Adam Newsome, T-Hall Crane, Development, Reversion of South position limit to OEM value
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The position limit modification described in e-log 49 has been reverted. Currently the South soft limit is set back to 0.36m.
The limit was tested and confirmed (craned stopped at 0.33m position which is acceptable due to coasting). The entire bridge range of motion was
checked to ensure there were no adverse effects - all is OK. The South bumpers need to be reinstalled - this will take place in the coming weeks. |
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Tuesday, March 15, 2022, 10:03, Adam Newsome, T-Hall Crane, Repair, North Aux Hoist VFD Replaced
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The North Aux Hoist VFD which had failed (e-log 50) was replaced today by Tom Kauss and Adam Newsome on Work Permit A2022-03-15-1.
The hoist's motions were all tested - it is functioning normally again. |
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Friday, February 18, 2022, 09:26, Adam Newsome, T-Hall Crane, Maintenance, Potential grease leak observed
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Naimat Khan noticed after using the crane that some grease dropped onto a spreader bar, and believes it is a leak from the main hoist (see attached photo).
The hoist should be inspected.
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Tuesday, February 01, 2022, 08:29, Adam Newsome, T-Hall Crane, Repair, North Aux Hoist - West Motion Failure
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An issue was observed in which the North Aux hoist failed to travel West when commanded to, but the East motion was functioning. The up/down motion
was also functioning. The North Aux Hoist Trolley failed during regular usage, seemingly randomly, when it was about 70% towards the West end of travel.
Note that the West motion VFD inside the North Aux Hoist is the one previously taken from the South Aux Hoist (the same issue with the North Aux Hoist |
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Thursday, January 06, 2022, 10:46, Adam Newsome, T-Hall Crane, Development, Modification of South Limits
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Edit: as of May 30, 2022, the modification has been reversed, and the crane is functioning normally as per the manufacturer's limits.
Modifications have been made to the crane to allow for the South Aux Hoist to reach closer to the South wall during the ARIEL Hot Cell installation |
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Tuesday, November 23, 2021, 11:01, Adam Newsome, T-Hall Crane, Repair, Load Cell - Not Functioning
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The load cell which is located on the crane itself to display the load to operators was reported not working during the week of November 15. It is planned
to investigate on Nov. 25 and this e-log will be updated with the status.
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Thursday, September 16, 2021, 09:37, Adam Newsome, T-Hall Crane, Maintenance, Bridge Encoder Homing
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The bridge motion was slowed due to encoder homing issue. It is likely that the problem which occurred yesterday caused an velocity fault (mismatch between
encoder speed and commanded speed), which unlatches the homing status for the bridge motion axis.
When the bridge was in the southmost position (bumper pressed against wall), the position readback was: 0.353 m, encoder count = 5164003. |
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Wednesday, September 15, 2021, 15:10, Adam Newsome, T-Hall Crane, Maintenance, Hoist Broken Fault (actually: cable wrap issue)
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A fault occurred which presented as "114. Main Hoist Cable Broken (3200PX)". This occurred when a SEG block was suspended approximately 1 m
off the ground.
Upon inspection, it was determined that the cable was in fact not broken, but wrapped around itself. There are no guides, and it is possible for |
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