End Effector

This week , we developed our end effector for our machine.

1. Adapting Vinyl Cutter Tool to Marker Tool

On the Fabinabox page

2. Researching Knives and Beyond

(To be formatted soon)
CNC Mill Donek Drag Knife on Shopbot CNC https://www.youtube.com/watch?v=P8jbtRTV6uw Drag knife: https://www.youtube.com/watch?v=YqvgA1P5hWg exploded view of 3D Printed part assembly at 0:18 Veneer cut examples: https://www.youtube.com/watch?v=csk0QrvMHwM Balsa Acetate material claimed to be cut by Blick’s Swivel exacto knife! http://www.dickblick.com/products/x-acto-econo-swivel-knife/?param=0&ig_id=2640 With Tangential cutting for thick material: Cutting cardboard: https://www.youtube.com/watch?v=aY3h352Lhn4 with a more rigid Knife like esko’s or zund’s (http://www.wide-format-printers.org/...XY_flatbed.pdf) these machines easily handle 1/8” polypropylene polyethalene sheet and was able to score about .020 to .040 deep: Spectrum(understood thanks to: http://www.signwarehouse.com/blog/basic-guide-vinyl-cutters/): Swivel Knives (Basic blade following path) —> Tangential Emulation ( Tangential emulation intelligently orients blade direction — without the blade leaving the face of the media.) —> Full Tangential cutting (lifts and rotates the blade at corners to prevent getting stuck in thick material) So that’s the Key: for thicker material, need to rotate blade. Servo motor? Tangential knife with electric oscillator: https://www.damencnc.com/en/tools/tangential-knife---accessories/tangential-knife, $+$1,199! Swivel Knives: roller bearing: http://www.ebay.com/sch/i.html?_nkw=roller+bearing Awesome DIY Swivel (or Caster) Drag Knife: http://www.buildyourtools.com/phpBB3/viewtopic.php?f=8&t=944 Tangential Cutting with Servo: polyethalene sheet and was able to score about .020 to .040 deep: http://www.rockcliffmachine.com/forum/showthread.php?440-tangential-knife-cutting-Styrene To make my own, just need: Drag knife holder: https://www.rockcliffmachine.com/product/cnc-drag-knife/ Motor Nema 11 or 17 or better: https://www.rockcliffmachine.com/product/stepper-motor-nema-11/ Random: Explaining G-Code: http://www.cuttingedgecnc.com/tipsandtricks.htm Blade Supplier: http://www.uscutter.com/Cutter-Blades-Bladeholders?view_all Scared I may have found a Fabinabox…. https://www.rockcliffmachine.com/shop/

3. Towards Designing a new Knife cutter