# Ooza cnc router, coffee 3d printer, and pen plotter

[Ooza](http://ooza.local)<span> is our name for the large CNC rig in the basement. It's capable of basic 2D plotting, as well as soft material extrusion via an attached controllable air pressure regulator. We also have a dewalt router ready to be attached. Reach out to micro or lp for training and usage. (PW ooze)</span>  
  
[WIki](https://wiki.ratrig.com/en/build-guides/killerbee)<span> for RatRig Killerbee (1510?)</span>  
[3D Model Viewer](https://ratrig.autodesk360.com/g/shares/SH286ddQT78850c0d8a49063b51ac2ff89e3)<span> (wants email for download)</span>  
  
**Layout**  
[layout drawing](https://wiki.commons.nyc/uploads/images/gallery/2025-11/ooza-bed-layout.png)<span> A0 Landscape (electronics left side) work area - 1189x841x95mm.</span>

**Tools**  
[Pen holders, sized for sharpies by @LP](https://cad.onshape.com/documents/a7004339719b8194c98d1ff1/w/2a43afa87741d7d332fc674e/e/eb8e0a1270b5742382a76c5a?renderMode=0&uiState=6902928b3060d2615aa58b48)

**Pen Plotting Software**  
[List of pen plotter software](https://mattwidmann.net/notes/pen-plotter-graphics-software/)

[svg2gcode](https://github.com/sameer/svg2gcode)

web: ooze  
pi: oozaooze

# Ooza plotter toolheads

Pen holders, sized for sharpies

[https://cad.onshape.com/documents/a7004339719b8194c98d1ff1/w/2a43afa87741d7d332fc674e/e/eb8e0a1270b5742382a76c5a?renderMode=0&amp;uiState=6902928b3060d2615aa58b48](https://cad.onshape.com/documents/a7004339719b8194c98d1ff1/w/2a43afa87741d7d332fc674e/e/eb8e0a1270b5742382a76c5a?renderMode=0&uiState=6902928b3060d2615aa58b48)

# Motors

   
[LDO-57STH86-3004A](https://ratrig.com/products/nema-23-stepper-motor-high-torque-1-8degree-step-345oz-in)   
  
Stealthchop

We set stealthchop motion because its quieter, and we set it from moves as slow as 5mm/s so that we don't get whiplash from switching between stealthchop (voltage-controlled) to maxspread (pwm-controlled) output at high speeds.  
  
[Stall Detection](https://docs.duet3d.com/User_manual/Connecting_hardware/Sensors_stall_detection#minimum-recommended-speed-for-stall-detection)

Stall detection gives us virtual endstops on the maximum X and Y, and protection if a toolhead gets stuck on something.

Note! I am not sure if the rated toque should be 3.0A, or 3.0A \* 2 because there are two phases in the motor

  
A rough figure for the minimum speed in full steps per second (M915 H parameter) for which you should be able to get reliable stall detection is given by this formula:

```
min_full_steps_per_second_for_reliability = 
  steps_per_full_rotation * rated_current
  * (actual_current/(sqrt(2) * pi * rated_torque_nm)) 

steps = 400
rated = 3
actual = 0.8 Amp
pi ‎ = 3.142
sqrt(2) ‎ = 1.414
torque = 2.4 N/m (from 24.5Kg-cm)

actual / (sqrt(2) * pi * torque) ‎ = 0.075

steps * rated * 0.075 ‎ = 90
```

[![hw1462ec_specs_new.webp](https://wiki.ridgewoodcommons.nyc/uploads/images/gallery/2026-08/scaled-1680-/hw1462ec-specs-new-webp.webp)](https://wiki.ridgewoodcommons.nyc/uploads/images/gallery/2026-08/scaled-1680-/hw1462ec-specs-new-webp.webp)

# Biomaterial Recipes for 3D oozing

**MATERIALS + RECIPES**

[Fiona Bell / Leah Beuchley Biomaterial Recipes for 3D Printing](https://static1.squarespace.com/static/5d8c4a63c0ab5665725154db/t/67fd48b7e0471a2f61344372/1744652492566/Biomaterial+Cookbook.pdf)

[Materiom materials reference database](https://commons.materiom.org/materials-database)

[Collection of recipes and experiments from 2022 MICA class](https://docs.google.com/presentation/d/1i8VD-H2lMeo2ehndw2CnvONBnosmPIBk6uh6E8G8Dvg/edit?usp=sharing)

[A.LIVE Bioplastic Cook Book - Great examples and descriptions](https://www.archiprix.nl/national/domain/nl/userfiles/file/2023reports/BookIreneWingSumWu_Book1_Alivecookbook_spread.pdf)

**STARTER MATERIALS:**

<div id="bkmrk-biopolymers%3A-%28thicke">BIOPOLYMERS: (thickening, durability, texture, strength)</div><div id="bkmrk-agar%2C%C2%A0carrageen%2C%C2%A0cor">Agar, carrageen, cornstarch, potato starch, alginate</div><div id="bkmrk-">  
</div><div id="bkmrk-plasticizers%3A-%28flexi">PLASTICIZERS: (flexibility)</div><div id="bkmrk-glycerine%2C%C2%A0sorbitol">glycerine, sorbitol</div><div id="bkmrk--1">  
</div><div id="bkmrk-additives%3A-%28various-">ADDITIVES: (various qualities- stability against shrinkage if too much water)</div><div id="bkmrk-vinegar%2C%C2%A0sunflower-o">vinegar, sunflower oil, soap, baking soda, clay powder, fiber, wax, eggshells, coffee grounds, orange peels</div><div id="bkmrk--2"></div><div id="bkmrk--3"></div><div id="bkmrk--4"></div>**3D PRINTER SLICERS FOR BIOMATERIALS**

[Hand + Machine various slicers for 3D printing with Biomaterials](https://handandmachine.org/)

[Test print STL files](https://handandmachine.org/index.php/biomaterial-test-prints/)

**Some recommended tools to get set up for 3D oozing with biomaterials:**

[Eazao Heater ](https://handandmachine.org/index.php/eazao-heater/) added to print head suggested for uniform printing qualities

Food dehydrator - to prevent uneven shrinkage and cracking

[![Screenshot 2026-05-29 at 6.12.47 PM.png](https://wiki.ridgewoodcommons.nyc/uploads/images/gallery/2026-08/scaled-1680-/screenshot-2026-05-29-at-6-12-47-pm-png.png)](https://wiki.ridgewoodcommons.nyc/uploads/images/gallery/2026-08/scaled-1680-/screenshot-2026-05-29-at-6-12-47-pm-png.png)

# OOZA Biomaterials printing log