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Ray Kholodovsky (Cohesion3D)
484 followers -
Please do not contact me privately for support, post to the Cohesion3D support group instead.
Please do not contact me privately for support, post to the Cohesion3D support group instead.

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Today’s new project to take my mind off the real world: fixing recumbent bike model ST350

Symptom was that the brake system would never stop “cycling” through modes - you could hear the system keep moving and going through very easy to very difficult to pedal and never stop.

Got a crank puller from REI and took apart the shell.

The entirety of the control mechanism is a hobby DC motor and a potentiometer. Since the system has been doing full revolutions the pot knob has either gotten decoupled from the rotating output wheel, or the pot is busted. Will check resistances to see which is the case.

So if anyone has modded a servo for continuous rotation, this project is the exact opposite 🙂
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1/19/19
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Gutted a 3DSystems Cube3 (ekocycle is their “environmentally friendly” rebrand of the same thing). Inside all the plastic shells is actually a really sturdy, all metal, with linear rails assembly. Needs a good new hotend and control board. Not sure about recasing it. Might make some new panels. For a 6inch build volume it’s so small. I own a DICE so I’m not sure I’m allowed to say this is cute.
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12/26/18
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Need a favor. Does anyone have the digital power panel from the K40 that they removed? I would need the the panel and the cable that it came with, it's a white plug with 4 wires.

USA location is preferable.

Thank you!

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Cute :)
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Finally releasing, that thing I've been working on for the last year.
Also, I think its gorgeous, but that's just me.
2 years ago, on Thanksgiving evening, we launched our storefront for sale with several general purpose control boards. Little did we know that our little board for laser cutting would represent the vast majority of our sales. Over this time we have learned what the needs are for a laser cutter controller, what the pitfalls are in all of these cheaply made machines, and we're super excited to announce our new, honed in, Cohesion3D LaserBoard!
LaserBoard should make upgrading a Laser Cutter even easier than it was before:

It has 4 embedded Trinamic drivers that can go to higher currents, meaning you can drive your XY head AND a Z table AND a rotary directly from the board (you'll want to double check the current your motor uses to be sure though).

It's now super easy to connect external stepper drivers if you do need the extra current, and there's no firmware or config changes, it should just work.

There's a Jack so that our power supply will plug directly into the board, rendering the limited and unstable 24v rail out of the laser no longer a problem.

It is isolated and protected in a bunch of different ways, making it harder for the big bad laser with an ungrounded frame and power spike happy LPSU to kill the board.

It can drive CO2 laser PSU's, diode lasers, and CNC machines too.

LaserBoard joins our lineup as the big brother to the Cohesion3D Mini - it is more resilient, easier to use, and a better value especially for the people that want to use a Z Table and Rotary with their laser.

LaserBoard is available for pre-order now and expected to ship in about 2 weeks. The Mini remains available, and is in stock for immediate shipping.

Head on over to the product page to learn more. We can't wait to see what you make with your machines, our boards, and the amazing LightBurn Software!
http://cohesion3d.com/cohesion3d-laserboard/
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11/22/18
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Wink wink.
Can you believe that Cohesion3D is coming up on our 2 year anniversary? We've got something special to announce very soon.
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Wink wink.
Can you believe that Cohesion3D is coming up on our 2 year anniversary? We've got something special to announce very soon.
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Cohesion3D will have a booth at New York Maker Faire this weekend at the NY Hall of Science, and we'll be heavily showing off lasers, boards, and LightBurn (it's even on our banner). All I can say is I promise you'd meet some cool people from the laser and 3DP community. Comment if you're attending, looking forward to meeting you!

The Cohesion3D booth will be located in Zone 2, 3D Printer Village. And here's a pic of the booth we had at Bay Area Maker Faire last spring.
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Cohesion3D will have a booth at New York Maker Faire this weekend at the NY Hall of Science, and we'll be heavily showing off lasers, boards, and LightBurn (it's even on our banner). All I can say is I promise you'd meet some cool people from the laser and 3DP community. Comment if you're attending, looking forward to meeting you!

The Cohesion3D booth will be located in Zone 2, 3D Printer Village. And here's a pic of the booth we had at Bay Area Maker Faire last spring.
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I want to make one of these. Wonder what I could sell it for. Next pet rock anybody?
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