IM483H/IM805H Rev. R032206
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IM483H/IM805H Rev. R032206
The Microstep Resolution Select Inputs (MSEL)
Microsteps per step are selected via Pins 5 - 8 on connector P1. The table below
shows the standard resolution values and the associated input settings.
The microstep resolution can be changed at any time. There is no need to reset
the drive or cycle the power. On-the-fly “gear shifting” facilitates high speed
slewing combined with high resolution positioning at either end of the move.
When the microsteps are changed so that the IM483H/IM805H does not fall
on a full step (i.e. zero crossing of the sine/cosine) the IM483H/IM805H will
readjust itself at the next pulse that would overshoot the fullstep position. This
feature allows the IM483H/IM805H to readjust the motor position no matter
what resolution is chosen when it is changed.
Table 7.3: Microstep Resolution Select Settings
Figure 7.7: MSEL Inputs, Interface Example
1
1
RESOLUTION SELECT 0
RESOLUTION SELECT 1
RESOLUTION SELECT 2
RESOLUTION SELECT 3
SUPPLY GROUND
Bottom View
Resolution
Microstep Select Line States
Microsteps/Step
Microsteps/Rev
MSEL0
MSEL1
MSEL2
MSEL3
Binary Microstep Resolution Settings (1.8° Motor)
2
400
GND
GND
GND
GND
4
800
OPEN
GND
GND
GND
8
1,600
GND
OPEN
GND
GND
16
3,200
OPEN
OPEN
GND
GND
32
6,400
GND
GND
OPEN
GND
64
12,800
OPEN
GND
OPEN
GND
128
25,600
GND
OPEN
OPEN
GND
256
51,200
OPEN
OPEN
OPEN
GND
Decimal Microstep Resolution Settings (1.8° Motor)
5
1,000
GND
GND
GND
OPEN
10
2,000
OPEN
GND
GND
OPEN
25
5,000
GND
OPEN
GND
OPEN
50
10,000
OPEN
OPEN
GND
OPEN
125
25,000
GND
GND
OPEN
OPEN
250
50,000
OPEN
GND
OPEN
OPEN
Invalid Resolution Settings : May Cause Erratic Operation
GND
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
