MHT260a (Engl.)9-5
(c) Positioning accuracy is poor
(d) Origin return action is faulty
Positioning accuracy is poor
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With [FWD] or [REV], positioning accuracy is not sufficient.Moved with specified station No. ?
Current position display of keypad
panel shows target position ?
[P-action] may have been turned on without applying the brake at end
of positioning. [RUN] or [EMG] may have been turned off at end of
positioning.
Mechanical connection like
coupling. loosened ?
Locate and remedy loosening. Consider adopting mechanical equipment
system with a key or friction coupling.
Positioning accuracy within
electrical resolution ?
Check the mechanical and electrical resolutions (accuracy).
Check the para. setting.
Origin return action is faulty
Moves further beyond origin ?
[LS] may not be turned on/off. Use 3-wire type of [LS] or contact output.
Stop position different by exact
one rotation of motor-shaft ?
Speed reduction ratio excessive ?
Z-phase of encoder is near OFF edge of [LS]. Move the mechanical
position. Stop position can be adjusted by origin shift amount of basic
para.
Pulse count until Z-phase is detected from OFF edge can be displayed
by keypad panel : On011.
Station No. is "1" at origin return
end ?
Check for erroneous motion of [LS], defection distance of proximity
switch.
When required, replace the [LS] with optical detector or other quick
responding device.
Origin return action is not
executed ?
[ORG] may be turned on at all times after turning on power.
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Move the [LS] position opposite to return direction. Move the [LS] to
increase the origin shift amount.
Moves past at the origin return
end and then returns ?
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