HUST CNC H6D-T - Page 190

UST CC 6-T Manual
4 - 14
direction for Section-3 to find RI will also be opposite that for
Section-2 to leave the imit Switch, as per Fig. 4-11 .
Setting  256: Means when -ais Motor returns to machines ome Position
OM, the directions for Section 1, Section-2 and Section-3
will all be the same, as per Fig. 4-11 A.
The speed for returning to OM will be divided into the following 3 sections as per
Fig. 4-11:
will be set as 1/4 of that for Section 1; and its direction will be
determined according to the value contained in the system parameter
Section-3 Speed: Used for finding the speed of ero-point RI for Feedback
Return Speed 2”; its direction will be determined according to the
The customer must notice that when returning to OM, the machine will move
towards the Limit Switch with Section-1 speed and the length of said Limit Switch
must be longer than the deceleration distance; otherwise, the machine will overshoot
the imit Switch and generate incorrect OM-returning phenomenon.
isted below is the eample eplaining imit Switch length calculation formula and
calculation method:
Limit Switch Length FDCOM  CC  6
ote: FCOM  Section-1 speed for returning to OM.
ACC  1 acceleration/deceleration time
ample: FCOM OM-returning Section-1 speed: 3mm/min
ACC plus C time  1ms, then,