So I got my Taz 6 assembled and ran it through a few test prints. When I was mounting the toolhead I tried my best to ensure that the bottom of the toolhead was seated firmly in the X axis carriage while tightening down the 2.5mm hex screw at the top, since I had seen in the review by 3dPrintingNerd on youtube that there could be issues with the bottom of the toolhead being or becoming slightly loose.
I ran through the rocktopus test print and a 17g print of my own design, and then went back to check the toolhead only to find a disturbing amount of free play. I could lift the bottom of the toolhead away from the carriage in the Y direction by about ~1mm with a moderate amount of force, and could wobble it back and forth in the X direction with a fairly light touch.
I loosened and retightened the 2.5mm hex screw, again taking care to apply downward pressure to the toolhead to ensure it seated firmly in the carriage. The toolhead now feels secure again, with only a slight amount of free play in the X direction, but I’m worried that this problem might come back as there’s no positive retention of the tool head in the Z direction to keep it from jacking upwards out of the carriage due to X axis forces (like from the nozzle cleaning cycle).
Is there a torque specification for the 2.5mm toolhead retainer bolt? The head is pretty small so I feel like if I try to crank it down it’s just going to sink into the plastic and chew things up.
Has anyone devised workarounds for this issue? It seems like a piece of electrical tape placed on the bottom corner(s) of the toolhead might help prevent the toolhead from shifting in the X axis during cleaning, and prevent the head from jacking upwards?