Arduino-based toroid coil winding machine - video

[Jon]

Arduino-based toroid coil winding machine. By Mr Innovative. 24:04 video:

Previously:

CNC coil winder - video

[wizard69]

This has to be one of the nicest Arduino projects I've seen in years!!! Excellent work! However Mr innovative could use a new hammer. All in all I'm impressed, it is a great build without getting into more advanced fabrication techniques.


The builder asked for comments so as to improve the wrap so here goes.

• The biggest problem appears to be slippage of the coil form on the rollers. To that end it might help to stiffen up the idler roller supports. Right now pressure that goes to engaging the form is likely relieved by bending of the all thread.
• Like wise for the motor and driving pulley for the form. However this isn't as easy to address as you would need a more complex arrangement with the drive shaft suspended between two bearings.
• Form slippage can also be the result of a lack of friction between the drive roller and the form. Sometimes finding the right rubber is a challenge, but don't dismiss wide rubber bands glued to the roller. On the idler rollers I'd leave them as bare Nylon, delrin or whatever.
• Friction could also be an issue on the big wrapping ring. You might want to consider a strip of rubber in the bottom of that groove.
• Another possibility for the big ring is to mount a length of timing belt in the groove and then drive the thing with a double sided belt. You then get engagement like a set of gears. This assumes a timing tooth form that can self engage. An alternative here is to engage the belt with a regular timing belt pulley though slippage may be a problem with single tooth engagement.