UNSOLVED My Leapfrog Creatr dualheads differential z-movement

  • Hi, I´m adding rails to hotends in order to avoid scratching. Both hotends should move separately up when idle.
    I have now a bowden type CR-10 hotend. What kind of mechanism is recommended ? Now I concentrate myself on making a simple and accurate rail system, later I solve the electronics and transmission.
    I tried to find threads dealing with this issue, but maybe I didn´t find the right keywords. So please give me some links, thank You.

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