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A clean and elegant personal 3D printer built on a delta robot platform.
231 backers pledged $152,597 to help bring this project to life.

Fun With Ingredients

Posted by DeltaMaker (Creator)

Backers,

With the campaign winding down, we wanted to share some additional details on the hardware and components used on the DeltaMaker. To borrow a line from Papa John’s, “Better Ingredients, better printer.” Let's talk about some of the ingredients that make a better printer.

Controller Board:

The brains of your 3D printer is not the place to save a few bucks. We have evaluated the boards currently available on the market and feel that the Azteeg X3 is the best of bunch. We are locked into this board and this will ship on all of our printers. To see more about this board, please check out www.panucatt.com.

Linear Bearing System:

MakerSlide aluminum extrusions paired with Delrin v-wheels on bearings. This provides a linear motion system much more robust and rigid than found on many low-cost 3D printers and kits. This also retains a clean and elegant finished look, while still allowing the user to see all of the mechanical workings. For more information on MakerSlide, check out buildlog.net.

Delta Arms and Rod Ends:

The arms and rod ends are a potential weakness in delta designs. Flexing of the arms, and high friction in the rod ends, limits accuracy at high speed. DeltaMaker arms are constructed of 6061 aluminum tube with low friction, lightweight IGUS rod ends. This provides a very stiff, lightweight solution while allowing for the high pivot angle (+/- 40 degrees) necessary for the design.

Drive Pulley and Timing Belts

The DeltaMaker utilizes GT2, closed-loop, timing belts in its design. The drive pulley is all aluminum, with 20 teeth. This size, combined with 1/16 microstepping, provides the right balance of speed, torque, and resolution for this application.

What about the printed parts on the prototype?

Production DeltaMakers will contain no printed components. These parts will be replaced with a combination of aluminum, engineered plastics, and injection molded components. 

How fast can this thing go?

We have run motion tests as fast as 200 mm/s on prototype hardware (video coming to YouTube tonight!). As printed parts get replaced with production hardware, we will go faster. 

Thanks for supporting the project!

The DeltaMaker Team

Comments

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    1. DeltaMaker Creator on

      Craig - We are working directly with Bart Dring (creator of MakerSlide) to coordinate procurement. This has been in the works and plans are in place.

      Jason - Your calculations are correct. The stepper motor drivers are actually capable of 1/32 micro-stepping, which could double the current resolution. Regarding calibration, we'll be sharing more over time, so please stay tuned :)

    2. Missing avatar

      Jason Doege on

      A 20 tooth GT2 drive pully means 40mm per revolution / 3200 microsteps per revolution comes out to about 2032 microsteps per inch, does that sound right? So your precision on a bearing is about .0005" but I have no idea what the accuracy of these sorts of belts are over distance (+/- x%) nor what the accuracy of the micro-stepping driver is (I guarantee it isn't 16 perfectly equal angular displacements.)

      I am still a bit curious about how you plan to calibrate this thing over the volume of the build space (position of the build plate doesn't capture all the error as that does not account for varying perpendicularity of the linear bearings.) I might be inclined to put a touch probe on the hot end and something like a 1-2-3 block on the build platform, scan it and figure out how reality differs from my mathematical model and calibrate to that, but that's me. :-)

    3. Craig Dunn
      Superbacker
      on

      Quick question from a lead time perspective..... MakerSlide has historically been hit-or-miss as to availability and is quickly grabbed up on the occasions when limited batches are run. The last (well, ONLY) time I was able to get some was when Inventables.com partnered up with the buildlog.net guy to have an extruder run a batch. So, given this, I'm wondering if you have this critical element locked-in with your source to meet your target dates?