Controller Interface; Mm1000Dc/Dcs750 - Newport 850G Series User Manual

2.1 Controller Interfaces
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CAUTION
If the actuator encounters a hard stop within its range of travel (a
translation stage's or mirror mount's end of travel for example),
slip clutch releases to prevent damage to the gearhead. The clutch
is designed to slip just below the motor's maximum torque. The
motor should be stopped as soon as possible to prevent
overheating in this high torque condition.
These actuators are powered by a low inertia DC motor to provide smooth
movement with low acoustic and mechanical noise. Submicron resolution
is obtained with a precision-rolled and electropolished stainless steel
leadscrew driven through a low backlash reduction gear. The overall drive
train backlash of approximately 15µm can be compensated by Newport
controllers. Bi-directional repeatability to 1.0µm can be achieved through
this feature.
The motor has an ironless-rotor to permit fast response due to its low
inertia. The brushes are precious-metal plated for long life. The factory
lubrication has a vapor pressure of 10-6 Torr at 25°C.
The 850G Series actuators incorporate many new features, such as travel
limit switches and manual actuation, not found in previous Newport
actuators like the 850, 850A, and 850B Series. Additionally, since the 850G
use a higher torque motor, the servo parameters required for smooth
operation are different than for previous actuators. For these reasons,
controllers sold before the introduction of the 850G may not be
compatible and will require a special interface adapter. Some controllers
have been phased out and are not supported for the 850G.

2.1.1 MM1000DC/DCS750

The MM1000DC Controller/Driver (formerly DCS750) has been phased out
and is not supported to drive 850G Series actuators.
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