Direct Drive Motor DDM Series: High Speed, Rigidity and Precision

Direct Drive Motor DDM series

Speed

Built-in torque motor for direct drive, max speed 250rpm.

Super low inertia, high efficient gain loop response.

High acceleration and deceleration, 0- 180 degree positioning in 0.2 sec.

Precision

Zero backlash, mechanical wear-free and least friction.

High- end European optical encoder as standard equipment.

Excellent accuracy guarantee- 20 sec for positioning, 4 sec for repeatability.

ISO 230-2 norm applied as standard inspection.

Rigidity

Consolidated main body, all mounting interface are integrated onto the cartridge. Premium rigidity retained.

Protection

IP65 water proof with European adherent electrical connection.

Thermal detection as standard feature.

Safe parts holding design during power failure.

Environmental

Noise- reducing, easy maintenance, free from oil waste.

Compact structure for flexible working envelope.

Core Technology
High Speed and Precision

Higher Speed and Torque Performance

Table Ø 170mm model as example

Torque at Peak	201.5 N-m
Rated Continuous Torque	60 N-m
Continuous Power Qutput	0.968 kW
Max Speed	250

others

Torque at Peak	184 N-m
Rated Continuous Torque	46 N-m
Continuous Power Qutput	0.75 kW
Max Speed	200

Strict Inspection Norm

Table Ø 170mm model as example

ISO 230-2 (JIS B6192)

Accuracy Inspection upon ISO 230-2 international norm is operated with 5 continuous runs in clockwise and counterclockwise test.

others

JIS B6330)

Simplified inspection norm without number of laps indicated.

European High End Optical Encoder Applied

European Heidenhain or Renishaw are standard attachment for all detron DDM series. High resolution by ±2.5 secs.

others

Economic encoder by ±10 secs is applied, non-CNC purpose application.

Core Technology - High Rigidity

Main Cartridge Structure

Consolidated main cartridge with spindle mounting interface reserved.

Least isolated components, accumulated error reduced.

Excellent rigidity dynamic balance while high speed operation, low inertia and run-out concern.

Closer distance between optical encoder and bearing for higher positioning detection.

others

Weak and hollow cartridge without mounting interface reserved. Spindle is installed by isolated flanges.

Isolated parts caused more accumulated errors.

Instable rigidity and deformation, mass inertia, low loading capability.

Not recommended for high speed processing.

Longer distance between encoder and bearing, positioning detection is limited.

Practical test

Practical test Rigidity Experiment Analysis

Spindle Bearing

Cross Roller Bearing

moment Lb is longer than Lc, better loading performance.

Cross roller bearing with high capability of axial and radial loading. Better moment to ensure dynamic rigidity.

others

Taper Roller Bearing

moment Lc is shorter than Lb, lower loading capacity.

Low cost taper roller bearing, poor moment and less loading effect.

Guarantee for Thorough Protection

Chip and Water Proof

European adherent connector guarantees safe water proof, signal/ power cable/ pneumatic tube are all integrated in 1 compact pipeline.

All cables are shielded by anti- erosion pipe and the outer lattice prevents breakage by cutting chips.

others

Cables terminated in low cost plug connectors. Isolated electronic and pneumatic pipelines are randomly arranged.

Poor pipe material. Erosion and chip cut concern on nylon pipes. High risk by frequent break-down.

others

Brake in Various Condition

Table in Operation

Table Positions

Power Failure