Step 1 - Designing the Strap surround
The initial design was created in Fusion360 and 3D printed to test fit. I made the strap by cutting some cheap fake leather and hand stitching them using YouTube as a guide on how to do that.
Step 2 - Designing The Mechanism
- Must fit into standard mini mounting points
- Must be straightforward to fit with minimal modifications
- Function properly with a positive action to release the door
- Must be secure and not interfere with overall operation of the door
I took some measurements from the standard mini door release to use as a starting point for my design. The mounting points were a known position as were the attachment point for the handle and overall depth for the mechanism.
The spring provides the required resistance and return function when operating the release.
Step 3 - Making The Straps
On the leather straps I was able to hand stitch them using a method I learned on YouTube. This technique doesn't work on polypropylene webbing so I purchased an old semi-industrial sewing machine and taught myself to sew. Again, using YouTube as a reference.
I wanted to get the stitching as straight as possible so I 3D printed a guide to attach to the machine that can be moved in and out to vary the offset of the stitching. The webbing is simply pushed along the guide to produce a straight stitch.
If anyone is interested in buying a set of these I can get them made up in small batches if I receive enough interest. The machining is quite expensive in addition to the hardware required so the price will be around £250 per set.
Post a comment or email me if interested.