
B-65150E/04 4. SERVO FUNCTION DETAILS
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(5) Zero-width setting for a machine with a large backlash or twist
When servo software earlier than the series and editions indicated
below is used, and the dual position feedback function (or hybrid
function) is used for an axis where a machine backlash of about 1/10
revolution in terms of the motor shaft exists, the machine may stop with
a positional deviation remaining, which is greater than the dual position
feedback zero-width parameter value. (In some cases, there may be ten
or more pulses left.) To solve this problem, make the following
settings:
• An improvement in the zero-width function has been made to
Series 9080/001K and subsequent editions. With these software
series and editions, this problem can be solved without setting the
zero-width parameter to 0. For details, see Art. (6) below.
(a) Series and editions of applicable servo software
Series 9060/Y(25) and subsequent editions (Series 15-B, 16-A,
18-A, 20, 21, Power Mate)
Series 9066/F(06) and subsequent editions (Series 20, 21, Power
Mate)
Series 9064/I(09) and subsequent editions (Power Mate-E)
Series 9065/A(01) and subsequent editions (Power Mate-E)
Series 9070/L(12) and subsequent editions (Series 15-B, 16-B,
18-B)
Series 9080/F(06) and subsequent editions (Series 15-B, 16-C,
18-C)
Series 9081/C(03) and subsequent editions (Series 15-B, 16-C,
18-C)
Series 9090/C(03) and subsequent editions (Series 16i, 18i, 21i,
Power Mate i)
Series 90A0/A(01) and subsequent editions (Series 15i, 16i, 18i,
21i, Power Mate i)
(i) Use the digital servo software of the edition indicated
below or later.
(ii) Set the dual position feedback zero-width parameter
to 0.