Sienci Labs LongMill V1, Assembly Manual

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Below, the eccentric nut is in its highest position. This spreads the v-wheels furthest apart, making it easy to slide
the gantry on. This is how you want your eccentric nuts to be oriented to proceed with the assembly. This should
also demonstrate the concept of how these eccentric nuts can be used to ‘clamp’ the v-wheels onto the aluminum
rail in order to have rolling movement along the rail while still being rigid in other directions.
To adjust the eccentric nuts, you’ll have to make sure that the bolts on the v-wheels are still loose, then you’ll be
able to use an 8mm wrench or a pair of pliers to rotate the nut into the correct position. Once the eccentric nut is
where you want it, re-tighten the bolt with a size 4 Allen key to secure the nut into position. Do this for both nuts.
Before we start, you want to make sure that the eccentric nuts on the XZ-gantry are positioned correctly; this
can be checked visually. Since the eccentric nuts have an offset hole point, rotating the nut will change the hole
position. Looking at the gantry assembly from the front, this pictures shows the top, right eccentric nut at its
lowest position. This puts the v-wheel closest to the bottom v-wheel, making the wheel spacing too narrow to
install onto the X-axis rail.