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1.2
Features of the 1PM4
Overview
Liquid-cooled 1PM4 motors have been specially designed for direct mounting on mechanical
spindles. The hollow shaft permits the passage of coolant for tools with internal cooling.
The shaft is prepared on the non-drive end of the motor for connection of a rotary gland for
input of the coolant.
Given the compact design of modern machines, the heat loss from electrical drives can have
an adverse effect on the accuracy of machining, especially when they are directly mounted
on the spindle. The resulting demand for cold motors with a high power density has led to
the development of the 1PM4 liquid-cooled motors.
Furthermore, a combination of high torque and small unit volume (low mass inertia) results in
short acceleration and braking times and thus in a reduction in non-productive time.
The motors have a built-in hollow shaft measuring system for recording the motor speed and
indirect position.
Figure 1-2
1PM6/1PM4 Hollow-Shaft Motors for Main Spindle Drives
Configuration Manual, PPMS, 04/2008, 6SN1197-0AD23-0BP0
1PM4 series motor, liquid-cooled
Description of the motor
1.2 Features of the 1PM4
15
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