The math of filament

Recently I followed with a certain interest a project trying to calculate the 3D printers filament consumption during jobs. The ReFILL agent project first published on Hackster.io bases the calculation on the number of rotations of the filament roll detected by an RFID sensor. Then when the filament is near to finish an automatic order can be sent to amazon for replacement.

To be honest the idea has not convinced me too much because it is too complex to manage (every roll should be modified by the user adding a printed RFID tag and the measure is subject to a too big systematic error.

As I have explained in my comments on the Element14 blog post ReFILL-ament for3D printers the base principle is not correct and the systematic error is amplified and distributed up to the finished project.

To manage the math of the filament we should start from a different approach, not the too effimere roll rotation approach. This is the reason I started the 3D printer filament monitor project a couple of weeks ago.

Coming soon: TiltPan Micro Camera Arduino Shield

The next project will be published, soon available on Tindie.com is the TiltPan Micro Camera Arduino Shield. In the following video you can see the prototype on-the-move.

TiltPan Assembled 3Main features

  • Dual-axis tilt and pan 180 Deg movement with micro servos
  • Board shield arduino compatible with Duemilanove, Diecimila, Arduino UNO R1/R2
  • include a full HD micro camera
  • Shooting and video saved on the camera micro SD (up to 32Gb)
  • Arduino library provided with the shield (under development)
  • Can be easily adapted to other cameras
  • Full camera control (power, shooting mode, etc.)
  • Can capture time-lapse variable sequences
  • Independent power supply for the camera and servos
  • Can capture semi-spherical panoramas (need separate stictch software to assemble the image)
  • Independent axis movement in the sequences (tilt-only, pan-only) or synchronized movement (tilt-pan together)
  • More options and features are under testing

Test example

The video below shows a sequence only created with the device.

Test settings

  • One shoot every 4 seconds
  • First move from left-bottom to up-right, 1 Deg step on the longer axis (pan rotation)
  • Second move from the previous position to the middle position, pan rotation only, 1 Deg step
  • 512 frames shoot in the same position

Digital Potentiometer Arduino Shield Reviewed by Freetronics.com

Screen Shot 2015-03-24 at 07.50.40We wish to thank the friends of Freetronics (Australia) for the review of the Digital Potentiometer Arduino Shield on their great blog.

The shield PCB or full assembly version can be bought on Tindie. for 10$ (or less, follow the discounts and promotions). See the Freetronics full blog post here.

Digital Potentiometer Arduino Shield on Electro Schematics

Screen Shot 2015-03-16 at 17.54.02Full description of the Digital Potentiometer Arduino Shield on the new article on Electro Schematics electronic site. The article can be found in the Arduino section.

Includes downloadable sketches of the programs shown in the video below, a complete description of the project, schematics, PCB layout and the digital potentiometer device data-sheet.

The shield PCB or full assembly version can be bought on Tindie. Follow the full description on the product page.