B–65195EN/01
3. TROUBLESHOOTING AND
RECOVERY PROCEDURES
TROUBLESHOOTING AND RECOVERY
53
Adjustment 3: Feed forward coefficient (No. 8X68–1961–2068,
No. 8X92–1985–2092 (advance))
[9060, 9070, Series]
Specify the position gain setting range expansion function.
Function bit: No. 1804–2000–1000, B4=1
(Series 15–B, 16, 18, 20, 21)
D The function also expands the feed–forward coefficient range.
[9046 Series]
If a negative number is specified for the feed–forward coefficient, the
internal processing assumes a value ten times the absolute number of
the specified number.
If the calculation result obtained during parameter setting exceeds
32767, specify as follows:
(–1) x calculation result/10
Adjustment 4:
Position gain
Use the position gain setting range expansion function.
Setting: No. 8X11–1955, B5 = 1 (Series 0–C, 15–A)
Multiply 8X24–1891 by 8 and re–enter it.
No. 2000–1804, B4 = 1 (Series 15–B, 16, 18, 20, 21)
If an overflow still occurs :
1. Multiply the feed gear (or DMR) value by an integer.
2. Increase the following values by the same integer.
Parameter Series 0–C Series 15
Series
16, 18, 20, 21
CMR
Effective area
Limit to a position error
during travel
Limit to a position error
at a halt
Backlash
Reference counter
No. 100–103
500–503
504–507
593–596
535–538
570–573
No. 1820
1826,27
1828
1829
1851,52
1896
No. 1820
1826,27
1828
1829
1851,52
1821
(Example)The position gain overflows internally under the following
conditions:
α pulse coder, Reduction gear ratio: 1/20, Ball screw: 1 mm/rev,
Position gain: 30 (with 1µ scale)
In this case, specify the position gain setting range expansion
function. For 9046 series, multiply the number of position pulses by
8.
Number of position pulses
(No. 8X24–1891)
50 400
8
Adjustment 5: Number of position pulses
Make the changes listed below. Value E must satisfy the following:
Number of current position pulses/E < 13100