This test utility is intended for custom motors that do not have verified optimal
phasing information. It can be used instead of the Ultraware oscilloscope based
phasing method given in the Ultra3000 Drive Manual

(1)

. The test utility can

make false recommendations if the test set-up current level is too low, or an
obstruction is encountered during the test motion. The CHPS-Series stage
wiring must not deviate from the standard wiring. Do not use the utility if the
free travel distance of the application is less than the required ± test motion.

These are the pre-test requirements.

1. Check for mechanical problems with the stage assembly.
2. Use a test current value high enough to overcome non-acceleration forces

of stiction and friction, cable drag, magnetic attraction. A typical value
used is 15…20%. But values as high as 40% can be necessary.

3. Verify the free travel range from motor starting position is at least two

magnet pitches or 1 electrical cycle, in the negative direction, and four
magnet pitches or 2 electrical cycles, in the positive direction.

(1) The phasing diagram in the drive manual is for phase-to-neutral measurements. This requires use of a balanced resistor Y network

to create a virtual neutral. Alternatively, the phase-to-phase diagrams and procedures in the Ultra 100/200 can be used because
they are equivalent to each other after the phase shift correction is made.

This manual is related to the following products:

CHPS-200 Linear Stage Installation CHPS-150 Linear Stage Installation