Software Open Access
Luka Banovic; bostjanvihar
Vitaprint extruder 1.0 Table of contents
Here you can find manufacturing and assembly details for one Vitaprint unit. In this repository you can find STEP files for the Vitaprint unit in both orientations - Left and Right. The procedure is the same for both orientations (the final product is only mirrored) therefore you will find details for assembly for one unit in this repository.1.1 General
NOTE: manufacturing and assembly time estimates assume well-skilled user and presence of all the tools listed below1.2 Tool List and Skills Required
<img src="https://cloud.githubusercontent.com/assets/14543226/24997531/3aaafcba-2037-11e7-8800-1aba4ec7eacb.png" alt="bubble" width="450" height="400">
<img src="https://cloud.githubusercontent.com/assets/14543226/24997449/fa3d8c7e-2036-11e7-8a56-a97ed070c891.png" alt="table" width="500" height="600">3 Assembly Details <a id="ASSEMBLY"></a>
assemble each section separately, then join them together
| SECTION A | SECTION B | SECTION C | |-----------|-----------|-----------| |<img src="https://cloud.githubusercontent.com/assets/14543226/24998545/c2ab57ce-203a-11e7-9a3c-8f3a5b85e27a.png" alt="sectionB" width= "150" > | <img src="https://cloud.githubusercontent.com/assets/14543226/24998406/4e023a1e-203a-11e7-8f65-00fdcdb5f56f.png" alt="sectionB" width= "150" > |<img src="https://cloud.githubusercontent.com/assets/14543226/24998669/3aab29d4-203b-11e7-93f6-95d102f12aa9.png" alt="sectionB" width= "150">|
To download Arduino firmware for temperature regulation please visit vitaprint_heat_regulator. This is an external temperature control system and can be replaced by any system you may have available.Extruder calibration <a id="extcal"></a>
To ensure the stepper movement translates into the piston movement accordingly to the g-code, it needs to be calibrated properly.Calibration set-up <a id="calset"></a>
In principle, the calibration set-up requires:
The calibration protocol requires a set-up, where the piston translation, can be precisely measured in the axis of extrusion. For this purpose, the measurement device is fixed on the extruder in a way, that the extruder movement is translated directly into the measurement.Calibration procedure <a id="calpro"></a>
For a Nema 11 motor (with a planetary reductor) + an M5 spindle (0.5mm pitch/rotation), the default STEPS/UNIT value is 37914.30.Thermistor calibration <a id="thermcal"></a>
Every thermistor analog output values have to be mapped to actual temperature values via an equation. Every thermistor needs to be calibrated as described in this section.
EQUIPMENT: thermo block/plate (heat source), alcochol thermometer, thermistor, setup for reading analog signal from the thermistor, oil, glass.
Now your thermistor will give out the right temperature values.