ACU-RITE VRO 300M - Manual (Page 14)

VRO 300M Introduction
7
Power-On Position Recovery
Position-Trac
Certain ACU-RITE encoders, such as the ENC 150, contain closely-spaced
reference marks that enable the display to show the correct position after a
power interruption. The readout will indicate when power has been lost, and
will prompt you to move each axis until a reference mark is located. By
traversing the reference marks once in each axis, you will re-establish the
display position relative to the last known zero. The most you will ever have
to move an axis is about one inch. You must move in a positive count
direction
If you use an encoder that does not have the Position-Trac feature, the
procedure for recovering your position is slightly different. Reference marks
on these encoders are about 8 inches apart. You must find a convenient
reference mark and then use the same mark every time.
1.
Move near the desired reference mark.
2.
Press the . key.
3.
Move slowly past the reference mark until the readout recalls
its position. You must move in a positive direction.