Gearmotor Selection Guide and Application Strategies

1. Linkages and Mechanisms

2. DISCLAIMER & USAGE boosting application-focused learning through student ownership of learning platforms The content of this presentation is for informational purposes only and is intended for students attending Louisiana Tech University only. The authors of this information do not make any claims as to the validity or accuracy of the information or methods presented. Any procedures demonstrated here are potentially dangerous and could result in damage and injury. Louisiana Tech University, its officers, employees, agents and volunteers, are not liable or responsible for any injuries, illness, damage or losses which may result from your using the materials or ideas, or from your performing the experiments or procedures depicted in this presentation. The Living with the Lab logos should remain attached to each slide, and the work should be attributed to Louisiana Tech University. If you do not agree, then please do not view this content.

3. Gearmotors gearmotor right-angle gearmotor gearmotor with wheel 12VDC, 6.8RPM, 3/16-in shaft 12-24VDC, 19/45RPM, 4 7/8-in wheel; 0.55A @12VDC 12VDC, 5RPM, 6mm shaft, 1.2N-m torque 17971 MD from mpja.com TS-32GZ370-1650 from amazon.com 15870 MD from mpja.com Lower RPM is usually associated with higher torque … but torque also depends on gearmotor size.

4. One of our Most Popular Gearmotors with coupling no coupling coupling with pulley 12VDC, 110RPM, 50mA stall, 6mm diameter shaft 27mm long

5. Other Gearmotors right-angle gearmotor gearmotor with rotating arm mounting bracket with holes Buehler (10/21/42 RPM at 6/12/24VDC) http://www.mpja.com/

6. Micro Gearmotor http://www.mpja.com/

7. Mounting Gearmotors you may need to fabricate, 3D print, or purchase a bracket mounting holes or threaded screws built into motors(you will need to obtain screws that will properly thread into the holes) mounting brackets with holes pulleys, gears and brackets to attach rods can be bolted to the holes in the coupling 7

8. Solenoid Locks and Linear Actuators linear solenoids with return spring two configurations of solenoid locks 12mm stroke 5mm stroke linear solenoid; typical application is automotive door locks (0.75” travel; 9.5” extension rod)

9. Linear Actuator rod extends outward or inward; these move much slower than solenoids The Project-Based Learning Office has linear actuators with 50mm (about 2-inch), 100mm (about 4-inch), and 12-inch (about 300mm) linear actuators.

10. Standard Servo with Linkage The wire can be put through different holes in the “servo horn.” Moving the linkage to a hole further away from the axis of rotation will cause more vertical movement of the platform. • This wire was cut and then bent at the ends to create a linkage between the servo and the platform. • The bends at the ends of the wire are called z-bends … the wire can just be slid through the hole, and it stays in place by itself!

11. Linkages and Mechanisms General Rule: Don’t reinvent the wheel. Use your time wisely. If something already exists that will serve your purpose, then it is probably a good idea to purchase that item to incorporate into your design. Determine what you need, find several items that might work, look at the specifications for the items, and make a choice on which one will work best.