It is not necessary to re‑tension the belt after a simple speed change. The belt automatically maintains proper tension across all three configurations.
Proxxon uses unique pinless blades for the LU-6868. The manual details the :
Clean the machine with a soft cloth and apply a light machine oil to the guides periodically. proxxon lu-6868 wecker manual
Do not operate the tool in wet conditions or in the presence of flammable materials.
If you need, I can provide a link to the original PDF manual if available online. It is not necessary to re‑tension the belt
For English speakers, the US distributor often has a cleaner PDF. Look for the product in the "Micromot System" section. The manual includes both English and German translations.
: Ensure the input socket matches your device’s rating plate (typically 230V, 50/60 Hz in Europe). The manual details the : Clean the machine
Press the large SNOOZE bar on top for a 9-minute delay.
The manual clearly states: