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scottbez1 / splitflap

DIY split-flap display
https://scottbez1.github.io/splitflap
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v0.5 Laser parts offset #48

Closed henricazottes closed 5 years ago

henricazottes commented 5 years ago

Hi,

I cut a set today and after assembling parts, I see a small offset of the wheel regarding the front hole:

front_space back_space

The blue space seems fine but the red one seems a bit too much. Flipping the front panel was even worth. Is the assembly incorrect or is there an error in the file ?

Thanks

scottbez1 commented 5 years ago

It looks like you have the spool outer disk and the inner square piece (that the bolt attaches to) swapped - the smaller square piece should be on the inside of the spool disk.

See https://youtu.be/zHM8W6Rm2i4?t=136 for assembly instructions (sorry I haven't yet linked to this video from the project wiki).

On Mon, Nov 12, 2018, 10:03 AM Henri Cazottes <notifications@github.com wrote:

Hi,

I cut a set today and after assembling parts, I see a small offset of the wheel regarding the front hole:

[image: front_space] https://user-images.githubusercontent.com/5214384/48365966-c04f8380-e6ac-11e8-964e-8381dae7c20e.png [image: back_space] https://user-images.githubusercontent.com/5214384/48365969-c47ba100-e6ac-11e8-8a28-519d37c8ce7a.png

The blue space blue seems fine but the red one seems a bit too much. Flipping the front panel was even worth. Is the assembly incorrect or is there an error in the file ?

Thanks

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/scottbez1/splitflap/issues/48, or mute the thread https://github.com/notifications/unsubscribe-auth/AAZUqmZV3slL7AJDqplOI8pd0s4ApRO1ks5uubf5gaJpZM4YaKe9 .

henricazottes commented 5 years ago

Thanks, I could have guessed it...

Another question: the video made me realize that magnets are missing from parts list. What ref should I look for ? The hole is 3.7mm wide but it didn't give me a lot results.

scottbez1 commented 5 years ago

It's a little odd, but the magnets are actually in the electronics BOM since I originally used this magnet from Digikey -- 469-1027-ND a 4mm diameter x 2.5mm neodymium magnet.

I've also had success with some cheap 4mm x 1mm round neodymium magnets from AliExpress as an alternative. You could probably also get away with a small cube magnet (gluing it in place if needed) or drilling the hole bigger and using a bigger magnet. As long as it's strong enough for the hall-effect sensor it shouldn't matter too much. And the hall-effect sensor can be moved within its mounting slot, so there's nothing particularly precise about where the magnet is mounted on the spool; the sensor can be shifted forward or back as needed to fine-tune.

scottbez1 commented 5 years ago

Closing this issue to tidy up the issue tracker since I think I answered your questions, but please feel free to open a new issue if you have any more questions, more than happy to help :)