DMX ETH Manual
page 76
rev 1.16
Appendix A: Speed Settings
HSPD value
[PPS] †
Speed
Window
[SSPDM]
Min.
LSPD
value
Min. ACC
[ms]
δ
Max ACC setting [ms]
1 - 16 K
0,1
10
2
500
((HSPD – LSPD) /
δ
) × 1000
16K - 30 K
2
10
1
1 K
30K - 80 K
3
15
1
2 K
80K - 160 K
4
25
1
4 K
160K - 300 K
5
50
1
8 K
300K - 800 K
6
100
1
18 K
800K - 1 M
7
200
1
39 K
Table A.0
†If StepNLoop is enabled, the [HSPD range] values needs to be transposed from PPS (pulse/sec)
to EPS (encoder counts/sec) using the following formula:
EPS = PPS / Step-N-Loop Ratio
Acceleration/Deceleration Range
The allowable acceleration/deceleration values depend on the
LSPD
and
HSPD
settings.
The minimum acceleration/deceleration setting for a given high speed and low speed is
shown in Table A.0.
The maximum acceleration/deceleration setting for a given high speed and low speed can
be calculated using the formula:
Note:
The ACC parameter will be automatically adjusted if the value exceeds the
allowable range.
Max ACC = ((HSPD – LSPD) /
δ
) × 1000 [ms]
Figure A.0
Examples:
a)
If
HSPD
= 20,000 pps,
LSPD
= 100 pps:
a.
Min acceleration allowable:
1 ms
b.
Max acceleration allowable:
((20,000 – 100) / 1,000) x 1,000 ms =
19900
ms
(19.9 sec)
b)
If
HSPD
= 900,000 pps,
LSPD
= 1000 pps:
a.
Min acceleration allowable:
1 ms
b.
Max acceleration allowable:
((900,000 – 1000) / 39,000) x 1000 ms =
23050
ms (23.05 sec)
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