Today (2024-02-16) when operating the lift trolley to install shields in the cyclotron, the vertical motion was observed to be intermittently working. When the trolley was out of the cyclotron tank and on the carrier, troubleshooting showed that it was likely an issue with the motor relays. The relay box was removed and the relays showed signs of wear due to ageing. The relays were replaced with new ones, and the box was reinstalled. The vertical motion appeared to work correctly after the replacement. The issue is considered resolved.

It is suggested that all motor relays be inspected or replaced as soon as possible, as others are of a similar age and could fail in the near future.

Edit (2024-02-26): last week, further issues were encountered. It was suspected that the upper limit switch was faulty. The limit switch was replaced and the issues did not persist. Note: it is possible that all observed issues could be related to the CAMAC power supply problem discussed in e-log 169