I finally assembled my Metal Maslow kit, built my wall-mounted frame, and got ready to calibrate today. I tested the motors/encoders on WebControl before beginning the process, and kept getting a failing left motor result:
Testing L motor:
Direction 1 - Pass
Direction 2- Fail
Testing R motor:
Direction 1 - Pass
Direction 2 - Pass
… and after which, the L motor would spin CCW continuously. I sleuthed around the forums and found a mention of failed left motor tests (Left Motor test fails - #43 by Daniel_Papesca), and a possible cold solder of the driver chip. Sure enough, as suggested by @Jatt, pressing the heat sink of the M3 chip randomly got the CCW spinning to stop. Now the question is: how can we identify the cold solder joint? I snapped a pic of the solder work under my TLE5205 board. I’d like to clean up any other cold joints while I’m at it.