參數(shù)資料
型號： AMIS-30621-AGA
元件分類： 運動控制電子
英文描述： STEPPER MOTOR CONTROLLER, 0.8 A, PDSO20
封裝： 300 INCH, PLASTIC, SOIC-20
文件頁數(shù)： 4/57頁
文件大小： 1017K
代理商： AMIS-30621-AGA
AMIS-30621 LIN Micro-stepping Motor Driver
Data Sheet
12
AMI Semiconductor
– Sept. 2007, Rev 1.5
www.amis.com
12.4 Acceleration and Deceleration
Sixteen possible values can be programmed for Acc (acceleration and deceleration between Vmin and Vmax). Table 9 provides the
obtainable values in full-step/s. One observes restrictions for some combination of acceleration index and maximum speed (gray cells).
The accuracy of Acc is derived from the internal oscillator.
Table 9: Acceleration and Deceleration Selection Table
Vmax (FS/s)
→ 99
136
167
197
213
228
243
273
303
334
364
395
456
546
729
973
↓ Acc index
Hex
Dec
Acceleration (Full-step/s)
0
49
106
473
1
218
735
2
1004
3
3609
4
6228
5
8848
6
11409
7
13970
8
16531
9
19092
A
10
21886
B
11
24447
C
12
27008
D
13
29570
E
14
34925
F
15
147
85
29570
40047
The formula to compute the number of equivalent full-step during acceleration phase is:
Acc
2
Vmin
Vmax
Nstep
2
×
=
12.5 Positioning
The position programmed in commands SetPosition and SetPositionShort is given as a number of (micro) steps. According to
the chosen stepping mode, the position words must be aligned as described in Table 10. When using command SetPositionShort
or GotoSecurePosition, data is automatically aligned.
Table 10: Position Word Alignment
Stepping mode
Position word: Pos[15:0]
Shift
1/16
th
S
B14 B13 B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
No shift
1/8
th
S
B13 B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
0
1-bit left
×2
1/4
th
S
B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
0
2-bit left
×4
Half-stepping
S
B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
0
3-bit left
×8
PositionShort
S
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
0
No shift
SecurePosition
S
B9
B8
B7
B6
B5
B4
B3
B2
B1
LSB
0
No shift
Notes:
(1) LSB: Least Significant Bit
(2) S: Sign bit
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