S e t t i n g O u t p u t C u r r e n t
The Output Current on the IM1007 Driver is set by an external
1/8 Watt or higher resistor placed between Pin 4 and Pin 5 on
Connector P2. This resistor determines the per phase peak
output of the driver. The IM1007 uses a 1mA current source
to establish the reference voltage needed to control the output
current. The relationship between the output current and the
resistor value is as follows:
Output Current (Amps) = .003 x Resistor Value (Ohms)
(See the table below).
WARNING! Do not operate the IM1007 Driver without a
Current Adjustment Resistor!
A resistor
MUST
be placed between the Current Adjust Input
(Pin 4 on P2) and ground (Pin 5 on P2) to keep the IM1007
Driver and/or motor in a safe operating range.
A u t o m a t i c C u r r e n t R e d u c t i o n
The IM1007 Driver has the ability to automatically reduce the
current in the motor windings after the completion of a move.
The reduction occurs approximately 0.5 seconds after the last
positive edge of the Step Clock Input. The IM1007 Driver will
then revert back to the original current setting at the next
positive edge of the Step Clock Input. To utilize this feature, the
current reference output must be used by connecting a resistor
between Pin 3 and Pin 4 on Connector P2.
1 2 3 4 5 6 7 8 9 10 P2
Setting Output Current on the IM1007 Driver
.003 x R (CurrentAdjust) x R (CurrentReduction)
Output Current Reduced (Amps) =
R (CurrentAdjust) + R (CurrentReduction)
Output Current Reduced x R (CurrentAdjust)
R (CurrentReduction) =
.003 x R (CurrentAdjust) - Output Current Reduced
Setting the Automatic Current Reduction on the IM1007 Driver
P i n A s s i g n m e n t s
C o n n e c t o r P 1
C o n n e c t o r P 2
M i c r o s t e p R e s o l u t i o n S e l e c t I n p u t s ( M S E L )
B i n a r y
D e c i m a l
I n v a l i d S e t t i n g s m a y C a u s e E r r a t i c O p e r a t i o n
*
DO NOT
connect Inputs to
POWER GROUND
(Connector P2, Pin 5) or loss of
isolation will occur. These inputs must be connected to
LOGIC GROUND.
** Leaving the Inputs
FLOATING
is equivalent to +5 VDC (logic) being connected
to the input.
I M 1 0 0 7 O p t i o n s a n d A c c e s s o r i e s
Heat Sink ........................................................................................ H - 1 0 0 0
Thermal Pad ................................................................................ T N - 1 0 0 0
10 Pin Terminal Strips (pair) ........................................ T S - 1 0
IM1007 with Noise Reduction (filter) .................. I M 1 0 0 7 - N R
O u t p u t C u r r e n t / R e s i s t o r Ta b l e
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© Intelligent Motion Systems, Inc.
For More Information:
See the complete IM1007 Product Manual
on the IMS Product CD or at www.imshome.com
#
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Rev. 090205
