Version 1.1.2 vom 2019-05-07
Page 300
Translation of the original instructions
CNC 120-R
GB
C
NC-NCT12
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OPTIMUM
M A S C H I N E N - G E R M A N Y
®
11.7.2 Worm gear and worm wheel backlash adjustment
Drain the lubricating oil via the discharge opening of the rotary table.
Remove the back cover of the worm shaft.
Loosen the four screws (D) evenly then adjust with the four screws (C).
The adjustment of the distance screws counterclockwise causes that the worm shaft is
moved in arrow direction when fixing screws are fixed again.
Clamp the fixing screws and measure the backlash again.
Readjust further, when the backlash in the worm and the worm shaft is not within the range
of 0.01mm ~ 0.02mm.
"Ensuring the backlash“ on page 299
Adjusting nut
Adjusting sleeve
Fixing screw
Adjusting nut
Rear
Cover
worm shaft
Fixing
screw (C)
Worm shaft
Direction of reducing backlash
Taper bush
cover of gear box
Distance
screw (D)
Adjust seat