Adjusting The Belt Tension - SeeMeCNC Rostock MAX v2 Assembly Manual

Adjusting the Belt Tension

The mounting for the top idler pulleys is designed to allow you to increase the tension on the
belts if necessary. In order to adjust the idler pulleys you're either going to need a helper or you'll need
to lower the Rostock MAX v2 enough that you can hold a screwdriver in your mouth while you use
your hands to tighten the idler. It sounds nuts, but it works pretty well.
Fig. 11-15: Adjusting the belt tension.
Slide a screwdriver under the idler pulley from the right side and move the handle of the
screwdriver slightly to the left. This will ensure two things – you won't be pressing against the wires
that exit to the right and your screwdriver will be lifting up along the center-line of the bearing as
shown above. Do NOT push down on the screwdriver – the Melamine cannot take the stress and will
break as shown behind the red "X" above! When adjusting the tension, it's best if you move it a short
distance and tighten it each time. Do NOT over tighten the screws or you'll damage the Melamine by
pulling the screw or nut head through the material.
In order to set the correct tension, you're going to have
to use your Mk. I Calibrated Hand as shown in Fig. 11-16.
Put your hand into the position shown on the right and
using your right index finger, press on the meaty part of your
palm as indicated by the arrow. That is roughly the same
amount of "give" you want to feel when you're pressing on the
belt. Press on the belt in a spot about 5" up from the heated
bed, on the heated bed side of the tower.
Rostock MAX v2 Assembly Guide
Fig. 11-16: Mk. I Calibrated Hand.
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