Installing Z scales

These instructions are for machine models Vertex 261, 34X and Excel 51X-2500. This procedure should only be performed by authorized Micro-Vu dealers.

To replace a scratched scale, the items needed are a new scale and end caps to secure the scale in place. The fast track could be left in place and reused. Scale items are C8730134, C8730135, and C8730136 (160 mm, 250 mm, and 400 mm respectively) depending on the Z height of the machine. End caps are included with the scale.

Fixtures are used to place the Q limit and P limit magnets in the correct locations as shown in the images, this fixture is not available for sale, therefore our recommendation is to not move the Q and P limits from the Fastrack. If the limits must be moved, then make sure the location of these limits are marked in order to place them back on their original position.

The scale is secured onto the Z stage with two small dots of super glue, placed right where the reference mark and reference mark selector magnet are. Also, the end caps are glued to the stage with adhesive. Use acetone to remove the glue so the old scale can be removed.

Slide the scale under the Fastrack until equal amounts of scale stick out on each side. Make sure the side of the scale facing up has lines marked periodically. Carefully check that the scale is beneath every tab on the Fastrack. Note: Use the handle of a T-Handle or pliers to slide and drag the scale through the Fastrack.

When sliding the scale in the fastrack make sure the reference mark selector magnet is aligned with one of the reference marks on the scale. The reference selector magnet must be aligned with the refence mark closest to the Q limit magnet as shown on the image below:

Install one pair of end caps over the remaining tape. Make sure there is a gap between the end cap and scale of about 1-5 mm

Redo a machine calibration after finalizing the Z scale replacement.