Adjusting Belt Tension; Mill; Lathe; Adjusting Gibs - Smithy MIDAS MI-1220 LTD Operator's Manual

Midas 1220 LTD Operator's Manual

Adjusting Belt Tension

The MI-1220 LTD has two belt tensioners
installed by the factory. One for the
millhead and the other one for the pulley
box.
Figure 5.11 Mill belt

Mill

Locate the "L shaped" lever and a thumbscrew at the top of the mill motor. Loosen the
thumbscrew and then rotate the lever to increase or decrease the belt tension.
Re-tighten the thumbscrew when the desired tension is achieved.
Figure 5.12 Lathe belt tensioner.

Lathe

Locate the belt tensioner handle on the motor mount. To tighten the lathe belts, move
the tensioner handle upward so that the handle points toward the lathe head. Turn the
knurled knob clockwise to tighten the belt and counterclockwise to loosen it.
Adjusting the Gibs
The MI-1220 LTD machines have straight gibs. Before using the machine, adjust the gibs
evenly. First tighten the screws all the way. This will lock the movement. Then loosen
each screw one quarter turn and check it. Tighten the gib, the more accurate it will be.
Removing and polishing the gibs also improves the tolerances.
With the gibs properly adjusted, review the following instructions on how to reduce the
backlash, or lost motion in the screw, which also depends on the type of job you're doing
and/or individual preference.
5-7
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