– 6 –
Full Coil
versus
Half Coil, cont.
Danaher Motion
•
Precision Systems Group
•
7C Raymond Avenue, Salem, NH 03079
tel:
603.893.0588
•
toll free:
800.227.1066
•
fax:
603.893.8280
•
url:
www.danaherprecision.com
will improve performance. The MDM-7 drive module is shipped
with a l5K ohm resistor installed, corresponding to a 1.0
Amp/phase motor in half coil mode, or a 2.0 Amp/phase motor
in full coil mode. Do not operate the module without a current
setting resistor. If the resistor is omitted, the drive current
defaults to 3.5 Amp/phase (half coil). This could overheat and
damage any motor not rated for this current value.
Pin #12 Power Supply Ground
This pin is internally connected to pin #1. Due to its proxiaity to
the Current Set pin (#11), it provides a convenient attachment
point for the current setting resistor.
Due to its efficient FET output stage, the MDM-7 drive module
can be simply bolted to any flat surface in the majority of
applications, without the need for additional cooling provisions.
High current motors operated in half coil mode may require
additional heat sinking or forced air cooling; the basic
requirement is to maintain the module case temperature at
or below 60°C.
Figure 03
