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Nicholas Seward
1,065 followers -
I am a nerd and a computer science teacher. You say redundant. I say a lot of a good thing.
I am a nerd and a computer science teacher. You say redundant. I say a lot of a good thing.

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I tried to build the compound reduction into the arm but for multiple reasons (mostly simplicity and reducing unique belt lengths) I have decided to go with an off arm solution. As shown, there is a reduction of about 28 which is twice the last iteration. This should allow 1.8deg/step steppers to work just as good as my current setup with 0.9deg/step steppers.

Edit: as everything was falling into place things decided to fall completely apart so I am back to square one. I really want to get this build in 2 weeks time but that is starting to be unrealistic.
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I would like to encourage you to go over to the Hackaday.io site and like/follow the project to help it get the standing it deserves. It does require you to have an account or link up one of your existing accounts. It looks like I could win real money which would go a long way to my mad scientist fund.

Update: I am done with firmware for a while and I am finalizing HELIOS v0.2 and hope to have full renders and animations out early this week for peer review.
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I have incremental bed leveling mostly working in Smoothieware.

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For those of you that are disturbed by my dislike or lack of endstops. This is one sensor that will rule them all.
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Everything is pretty much falling into place. I am literally down to my last component. The piece of plastic between all the steppers is giving me fits. The biggest problem is how should I do the belt tensioning. That back stepper especially need some redirects at the leading edge of this piece. None of that is really hard but none of the solutions are really speaking to me. The real trick is to keep the redirects/tensioners from limiting the arm movement any more than the steppers already have. I may have to bite the bullet and further limit the arm range. It won't really change the printable area although it will move the arc where you have to arm switch.

BTW, if I can pull this off then the whole printer can fit in a 200mm/8" cube.
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Anyone have any Make contacts? I want to get into the Bay Maker Faire but I obviously didn't know this would be so awesome until it was too late.
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