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March 2022

March's Motion Ideas and Tips

【Application】Tension Control with Torque Motors

Torque motors are ideal for winding and unwinding type applications.  A torque motor can act as a brake when back-driven or a simple device to provide tension.  Depending on the torque setting, the motor will provide tension to the material while automatically taking up slack in the line.
Application: film winder

How does it work?

Ready for a product demonstration?

Torque Motor Demo Video

Locked Rotor

In addition to tension control, torque motors can also be used for certain stamping and pressing applications when coupled with a linear device.

How do you size a torque motor?
Application Requirements Motor Sizing Calculations

Max Diameter = 12”
Min Diameter = 4”
Max force per material = 32 oz Force
Speed = 4” / sec

Tmin = F * (D / 2)
Tmin = 64 oz-in

Tmax = F * (D / 2)
Tmax = 192 oz-in

Vmin = (4” / sec) * (rev / {4” * pi}) * 60
Vmin = 19 RPM

Vmax = (4” / sec) * (rev/ {12” * pi}) *60
Vmax = 6.4 RPM

If gear ratio = 15:1
Tm = (Tmin/max) / (15) / (81%) (gear efficiency)
V = (Vmin/max) * (15)

Then motor torque {Tm} and speed {V} will be:

Tmin = 5.3 oz-in at 285 RPM
Tmax = 15.8 at 96 RPM

Consult the torque speed chart above. The results appear to fall within the specification of the motor when looking at the 60VAC or below curves.

0.125 Nm = 17.7 oz-in
0.05 Nm = 7.1 oz-in

Recommended Controller + Motor + Gear Ratio
TMP-1 + 5TK20GN-AW2U + 5GN15KA

Torque Motors Lineup  

【Engineering Note】What is Modular Automation? 

Our Engineering Notes blog is a collection of motion tips, application examples, and trending topics in motion control.

Modular automation

Modular automation is the next phase of factory automation where the same production line is separated into modules and can be quickly reconfigured for different needs. 

We're ready for this trend.  Are you?

What is Modular Automation?

Modular Production Line Layouts

What is Modular Automation?

Modular Automation Compatible Products  

【Support】Engineering & Design Resources

The Engineering & Design Resources section of our website includes content and tools to help you visualize an application or find an answer quickly.

Engineering & Design Resources  

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