Preston DM-2 focus motor overheating during high-power operation on set

Gear

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Master SeriesIs a used Master Series rig worth buying as a first big rig?191

BFDHow do I power my BFD receiver from my camera or sled?186

VoltCan I retrofit a Volt onto my existing sled or gimbal?168

ArtemisHow do I power my camera and accessories from an Artemis sled?166

MDRWhere can I mount my Preston MDR on my rig?143

ModulusIs there a Modulus option for HD wireless video?141

G-70Will my G-70 fit my vest, gimbal or sled?126

FI+ZCan I control iris and zoom wirelessly, not just focus?60

HU3Where can I get my HU3 repaired, refurbished or repainted?60

CineLiveHow do I pack and case my CineLive rig for transport?54

G-70XHow does the G-70X compare to Pro Titan, Xarm and other arms?46

Trinity 2Is Trinity 2 SUP 3.0 firmware safe to install or buggy?46

Ultra VestWhich vest should I choose for my body size, comfort and operator type?39

2006Follow Focus forum

20 years old. Gear and prices may have changed since.

DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.

A Preston DM-2 motor operating at maximum power setting began losing pulling force and showed reduced range of motion, eventually becoming too hot to touch.
Internal misalignment of the motor's drive gear and worm gear assembly can cause the motor to work harder and overheat.
A motor stalling against a physical stop while on high power setting can continue to draw current and grind internally, generating excessive heat and potential damage.

The exact cause was not definitively determined before the motor was sent for service.
The motor was sent for professional evaluation but results were not reported in this thread.
Unclear whether the damage resulted from impact, misalignment, or stalling against a stop.