Our project is small automatic box folding robot. This system is designed for micro factories like a successful kickstarter, or US based small manufacturing company. People who want to stay local, but the only way to compete with cheap overseas labor is to be automated. Technology like 3D printing and CNC are making automation attainable but in packaging there is still a missing component. We plan to uses a LabView based virtual interface for easy operation via touch screen. Its key mechanical feature is a universal linear actuator. We have a clever cheap arduino controlled design for them we are developing. These linear actuators can be combined in a huge number of configurations and are proving to be one of the most fun and exciting discoveries in the project. It will folds Indestructo Mailers, a new style of cardboard box. They requires no glue or tape to assemble. They are also stronger, have a lid, and stack in higher densities when un folded.
Components
1×
arduino mega
12×
NEMA 17 Stepper motors
yes we need 11 stepper motors for box folder
I reduce the motor controller boards down from 5 Big Easy drivers to 4. I also made the 24 volt lines much thicker. Also a special thanks Metal for all his help and the better Quick connectors
if you look at the pins below the heat sink you will see one is missing, that is because it got fried.
I have fried 3 like this so far :(
One was because of bad stepper motors. The steppers also destroyed the internals of 4 other drivers. They have been sent back and replaced. Thank you Dan for getting replacements.
One was my fault, I wired a motor to the drive wrong.
The latest time I don't know why it blew. This is of course the one bothers me the most because the unknowns are preventing us from getting more than 5 motors working in sequence.
we made some circuit bored or the first time on the other mill. It was very satisfying. Starting we made a beak out bores to connect our 8 limit switches to a IDC 16 pin ribbon cable. We made a 4 stepper to IDC also. we got the tool and made the cable our selves and it was relay fast with no soldering.
What chips are you using for the stepper controllers? I'm currently testing out L6482 's which are SPI controlled so only one wire from the mcu is required.
Nice project! It a really a nice application for my project (AnanasStepper), which is designed to control multi stepper motor at the same time. I think we can cooperate!
Well, servos are made for RC toys. Even the big ones are not really made to drive stuff. The way to go would be a geared DC motor in combination with two end stops. Get something that can put out a two digit wattage. DC motors can go into overdrive for a short time if they get time to cool down afterwards. Something you can easily do in this application.
It kinda bugs me that you are heading for all this high precision CNC gear while you actually need something strong and rugged with comparably low precision.
You could probably get away with some cheap steal rods with wooden carriers directly riding on them with laser cut holes.
Given that you don't need to be extremely precise to fold box panels, I'd go with servos which are geared internally instead of stepper motors. The servos are cheaper, more powerful and easier to drive too.
Do you have some problems about motion control ?Maybe AnanasStepper https://hackaday.io/project/20980-ananasstepper-20 is to meet your need!