Preston DM-1X motor specifications and practical differences compared to DM-1 and DM-2

Gear

ZephyrCan I fly my Alexa or RED on a Zephyr?389

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

2008Follow Focus forum

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

The DM-1X measures 117x54x31mm, positioned between the DM-1 (122x75x33mm) and DM-2 (100x50x28mm) in size.
The DM-1X rotates at 4 revolutions per second, making it faster than the DM-1.
The DM-1X delivers approximately twice the power output of the DM-1 motor.
The DM-1X achieves focus speed comparable to the DM-2 iris calibration speed on Cooke S-4 lenses.
Despite specifications listing 290 grams for the DM-2 and 415 grams for the DM-1, the DM-1X feels lighter in hand than expected.
The DM-2 rosetta attachment is too short to fit the DM-1X, while the DM-1 rosetta is too long by approximately 2mm on each side.
The DM-1X lemo connector keyway faces upward toward the gear, which may cause cable length issues with Arricam LT cameras when using right-angle motor cables mounted from the top.
The DM-1X output gear spins freely, unlike earlier models where the gear was fixed and required significant force to move.
The DM-1X costs $3250 plus $62 for the larger output gear, compared to $2885 for the DM-1 and DM-2.

Rosetta compatibility issue was noted as being addressed but not yet resolved at time of writing.
Observation about DM-1X feeling lighter than specifications suggest is subjective and may not reflect actual weight difference.
Cable length issue is specific to right-angle motor cable setups on Arricam LT with top-mounted motors.
Discussion occurred in 2008 and reflects motor specifications and pricing from that period.