small motor & rigging medical project

[102pat]

Retired military needs a device for home use to move a 1ft x 18 inch platform back and forth 2 feet; thrust +/- 50 lb. Cover distance in 10-14 seconds.

Malfunction/jam disconnect needed, plus operator capability to reverse direction of platform before completion of cycle.

Speed variation a plus.

 

[waross]

Drive a threaded shaft with a motor. You may use a gearhead motor.
Use a small three phase motor and a VFD. The Variable Frequency Drive will give you speed control reversing and may be programmed to provide jam detection/protection.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[MotorExpert]

I agree with Bill, I also recommend a threaded shaft.

When you use a shaft with lead 1/5 '' your specifications become:
Torque = 50 lb *1/5 '' = 10 lb.in
Average speed = 2 ft * 12 = 24 inch in 10 seconds or 720 rpm with lead 1/5''.

In the specAmotor site (

http://www.specAmotor.com)

you can use those two values (10 lb.in and 720 rpm) to find the best motor for your platform:
1) U12M4LR:forcedair electric motor from Danaher
2) Baldor BSM50N-175 with reduction

These motors are a bit overdimensioned but if you do not drive the motors 100% of the time than you can add a Duty Cycle and probably suffice with smaller motors.

Edward

 

[tygerdawg]

You can build it yourself or buy it pre-packaged. Some vendors of these type of devices:

Yamaha Robotics

http://www.yamaharobotics.com

Parker

http://www.parker.com/portal/site/P...3&vgnextcat=BALL SCREW AND LEAD SCREW TABLES

Danaher Motion

http://www.danahermotion.com/website/usa/eng/index.php

And plenty of others. You may even find this kind of stuff cheap on eBay, Craig's List, or industrial equipment auction sites.


TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering

http://www.bluetechnik.com

 

[itsmoked]

Welcome to Eng-Tips MotorExpert.

I third that suggestion.

Keith Cress
kcress -

http://www.flaminsystems.com