Proxxon Lu-6868 Wecker Manual

Solution: The X-Y travel slides have grub screws that adjust the "play" (backlash). The manual shows which hex key size (1.5mm) to use and instructs you to tighten them only until resistance is felt, then back off 1/8th of a turn.

Proxxon uses unique pinless blades for the LU-6868. The manual details the knurled nut tensioning system: proxxon lu-6868 wecker manual

If you do not follow this order (per the manual), the blade will snap at the first turn of the flywheel. Solution: The X-Y travel slides have grub screws

Even with the manual, the Proxxon LU-6868 is now 30+ years old. Here are the most frequent issues and fixes. If you do not follow this order (per

Since the original manual is rare, here is a comprehensive operation guide based on the LU-6868’s standard design.