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https://github.com/prusa3d/Original-Prusa-MINI.git
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6bdd616ca3
Documentation, BOM and source code Co-Authored-By: Robert Turinský <rturinsky@users.noreply.github.com>
144 lines
2.5 KiB
Markdown
144 lines
2.5 KiB
Markdown
### Recommended print settings :
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Printer : **Original Prusa MINI**
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Print settings : **0.20mm Quality**
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Material : **Prusament PETG**
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Nozzle : **0.4 mm**
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Layer : **0.2 mm**
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Support : **no supports**
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### **Edit :**
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Infill pattern : **grid**
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Infill density : **10 %**
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<br/>
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### **Parts :**
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- MINI-z-bottom-cover
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- MINI-z-bottom-cable-cover
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- MINI-fan-spacer
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- MINI-fan-spacer-clip
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- MINI-fsenzor-box
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- MINI-fsenzor-cover
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- MINI-fsenzor-lever
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- MINI-minda-holder
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- MINI-inspection-door
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- MINI-knob
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- MINI-heatbed-cable-cover-bottom
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- MINI-heatbed-cable-cover-top
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- MINI-rail-spoolholder
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- MINI-base-spoolholder
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-------------------------------------------------------------------------------------------------------------------
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### Recommended print settings :
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Printer : **Original Prusa MINI**
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Print settings : **0.20mm Quality**
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Material : **Prusament PETG**
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Nozzle : **0.4 mm**
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Layer : **0.2 mm**
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Support : **no supports**
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### **Edit :**
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Infill pattern : **grid**
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Infill density : **20 %**
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<br/>
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### **Parts :**
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- MINI-x-carriage
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- MINI-x-end
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- MINI-y-belt-holder
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- MINI-y-idler
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- MINI-y-plate-rear
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- MINI-y-plate-front
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- MINI-z-carriage-rear
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- MINI-z-carriage-front
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- MINI-z-bottom
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- MINI-z-top
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- MINI-extruder-rear
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- MINI-extruder-front
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- MINI-extruder-idler
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- MINI-display-box
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-----------------------------------------------------------------------------------------------
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Please keep in mind thermal expansion of used material especially in XY plane. Printed parts are tempered by heatbed - then cooled down to room temperature so parts shrink.
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```
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Apply this linear relation: delta D´ = D * gamma * delta T
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delta D´ = final dimension difference
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D = original dimension
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gamma = coefficient of thermal expansion for used material
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delta T = printed part temperature difference between current temperature
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while it's printed and ambient temperature in use
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Example:
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material PETG: HB temp. = 90 [°C]
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amb. temp. = 25 [°C]
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delta T 90 - 25 = 65 [°C]
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gamma 0.000068 [m/m*°C] [1/°C] (doesn't matter if Celsius or Kelvin)
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D 100 [mm]
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Use basic unit!
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delta D´ = D * gamma * delta T
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delta D´ = 0.1 * 0.000068 * 65
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delta D´ = 0.000442 [m] = 0.442 [mm]
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```
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Linear thermal expansion works for each layer if there's any delta T but every layer has different delta T if the heatbed temperates printed part - the higher layer position the smaller delta T. It's due to cooling printed part by ambient air and air flow from print fan.
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