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Variable, low-RPM DC motor setup?

Hey guys,

I'm hoping to build a motorized slider system for my DSLR camera. I'm going to build the slide from scratch and probably attach a motor with a pulley system to move the slide, this should give me the option of having the camera climb the slide if it's on a slight angle.

I'm not extremely electronically inclined but I understand I will need a low RPM motor and a PWM unit to adjust the speed. I'm thinking RPM between 0.5 & 10 would be ideal.

Could I buy one of these
(http://www.aliexpress.com/item/12v-100w-pwm-speed-controller-motor-governor-DC6-15v-STP50n05-wholesale/1663330358.html)

add a 12v battery and a 12v DC motor and call it a day? If this is the case, should I be aiming for a 10 RPM motor that I can turn the speed down on? Is a 12v battery/motor likely to give me reasonable torque for dragging a DSLR camera up a moderate incline? Battery life shouldn't be an issue as the longer the use the less RPM I'll need.

Any thoughts would be much appreciated.

Use a stepper motor and motor controller. Check the instructables listed on the right hand side of the page.

tig5 (author)  mpilchfamily3 years ago
Thanks! Does the stepper motor need to be RPM specific?

Steppers are not rated in RPM. They are rated in home many steppes or degrees it turns in a step. So the motor controller determines how fast or slow it spins.

When you look at memorized camera sliders or similar items like 3D printers and CNC mills they use stepper motors. They give you good pulling power with fairly decent accuracy. Allowing you to either run it up a ramp at a decent speed or slowly track across the slide for good time laps shots. Using an arduino you can program how the camera moves. You can tell it to slowly track from one side to the other then dash back again to do another sweep.