This project started with me wanting to take timelapse photos and videos where the camera is sliding on a set of rails. Because my primary application was timelapse photos, I wanted something that was motorized and automated so that I don't have to manually adjust the slider and cause inconsistency the the photos. Additionally, I wanted to be able to control the rig with a smartphone. Commercial products costs over 500$ and none of them are wireless so I thought I'd make something for much cheaper using 3D printed parts and off the shelf components. The final total cost was under 100$. It is still an ongoing project.
-iOS app
Designed using SolidWorks CAD
2 x 1/2 inch copper tubing as rails. I used a meter for each rail.
8 x 608 bearings for the rollers
NEMA 17 Stepper motor with 2x20 Tooth GT2 gears to drive the plate.
1x ESP8266 Adafruit Huzzah + FTDI cable
1x A4988 Stepper Motor Driver Carrier, Black Edition
5V power bank as power source with 2 output. 2A min on one the output
4 x 8mm bolts and nuts for the skateboard bearing
4 x 4mm bolts to and nuts attached the stepper motor plate to the chassis
2 x 3mm bolts to attached the stepper motor to the stepper motor plate
2 x 4 mm bolts and nuts to attached the belt to the bottom plate
1 x mm bolt and nuts + washer to hold the free spinning gear to one of the plates
1 x Small box to put all the electronics.
1 x 470uF Cap
1 x 5V to 12V voltage converter
1 x 1/4 inch or 3/8 inch bolt to attach the camera
2 x 3.5mm power jack
2 x usb cables
Hardware assembly is pretty self-explanatory. You can use the photos in the photo folder to get the idea. The top plate to support the camera includes a hole for 1/4 inch bolts and 3/8 inch bolts. You can either attach you camera directly to the plate or use a micro sliding plate to better control the balance of camera on the plate. This is especially useful for big and heavy camera like the d800.
To connect the electronics. Use [this guide] (https://www.pololu.com/product/2128)
The MCU will be the esp8266 and the 8-35V input will be the output of the 5 to 12V converter (the 2A one)
The logic power supply will be from 2nd output of the power bank.
There are 2 folders. One for the esp8266 code and one for the Android app. The esp8266 acts as a WiFi AP. The Android phone connects to the Esp8266 and controls is by sending html messages.
You'll need AccelStepper library for the stepper motor (http://www.airspayce.com/mikem/arduino/AccelStepper)