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Nicholas Seward
1,117 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.

1,117 followers
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I developed a generic cycloidal gear builder in OPENJscad. This is a smooth functioning planetary gear set with zero play. This was a test of the software. I wouldn't go this crazy in an actual machine. This same tech will be used in a few of my new 3D printer builds. I should be able to eliminate a lot of belts.

I am having trouble with a math problem. This arrangement is 2:1:4 sun:planet:ring. Why does it fit 6 planets? This one is weird. Let's assume we have normal gears. How do I take the 3 tooth counts and turn that into the max number of planets? (Overlapping planets are allowed for this question.) I ask because I have wasted a ton of effort making sure the sun and ring both had a multiple of the number of planets. Apparently that is not the case.
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4/27/18
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Reference print on the left. First sliced Tablebot print to the right. Not sure if the problem is calibration or kinematics. Either way we are changing the arm design. The tool chain has been proven and the surface quality is good.
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3/29/18
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Reference print on the left. First sliced Tablebot print to the right. Not sure if the problem is calibration or kinematics. Either way we are changing the arm design. The tool chain has been proven and the surface quality is good.
Photo
Photo
3/29/18
2 Photos - View album

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Reference print on the left. First sliced Tablebot print to the right. Not sure if the problem is calibration or kinematics. Either way we are changing the arm design. The tool chain has been proven and the surface quality is good.
Photo
Photo
3/29/18
2 Photos - View album

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Reference print on the left. First sliced Tablebot print to the right. Not sure if the problem is calibration or kinematics. Either way we are changing the arm design. The tool chain has been proven and the surface quality is good.
Photo
Photo
3/29/18
2 Photos - View album
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Bad news is we aren't ready for a file release at #MRRF2018. Good news is we will be at #MRRF2018 with two working HELIOS printers.
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GUS is all strapped in for the road trip to #MRRF2018
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Got the 200step/rev steppers installed and doubled the pulley size for the transmission belts. Tons of torque and very little heat. Have not printed anything yet but seems way more rigid and the math says the resolution should be fine.

Hate the top plate design. I have a great idea on how to make it look sweet but it will have to wait for the first child because it won't be a functional change.

We are now going to dive into using an accelerometer for impact probing. This is a big unknown for us. In theory, we can use it for homing and bed leveling but this has never been done before so there is that.

Once that is done...
-hardcore calibration
-design review
-model refactoring
-child printing
-child assembly
-child verification
-file release @ MRRF (fingers crossed)
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