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Chapter 9 Major Positioning Control
[QD77MS4 operation example]
OFF
ON
OFF
ON
OFF
ON
OFF
ON
11 11 11 01
00
V
Dwell time
t
Da. 1 Operation pattern
Start complete signal
BUSY signal
Positioning complete signal
Positioning start signal
Positioning
[Y10, Y11, Y12, Y13]
[X10, X11, X12, X13]
Dwell time
[XC, XD, XE, XF]
[X14, X15, X16, X17]
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
Fig. 9.5 Operation for the front-loading speed switching mode
3) Speed switching condition
If the movement amount is small in regard to the target speed, the
current speed may not reach the target speed even if
acceleration/deceleration is carried out. In this case, the machine
is accelerated/decelerated so that it nears the target speed.
If the movement amount will be exceeded when automatic
deceleration is required (Ex. Operation patterns "00", "01", etc.),
the machine will immediately stop at the designated positioning
address, and a "insufficient movement amount" (warning code:
513) will occur.
[When the speed cannot change over to
the P2 speed in P1]
For the following relation of the speed
P1 = P4, P2 = P3, P1 < P2
[When the movement amount is small during
automatic deceleration]
The movement amount required to carry out the
automatic deceleration cannot be secured, so the
machine immediately stops in a speed
0 status.
P1 P2 P3 P4
Positioning address
Pn Pn+1
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