User:McNeight

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Revision as of 17:23, 17 January 2014 by McNeight (talk | contribs) (Firmware)
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Hardware

Clonedel plastic parts from Metrix Create:Space with SAE / Imperial vitamins, resulting in a near duplicate of an SAE Prusa Mendel with a Wade's Geared Extruder

Electronics

Firmware

List of Firmware

Alternating between the johnnyr branch and tesla893 branch of Tonokip, as well as the main branch of Teacup Firmware. Will try Klimentkip in the near future.

Software

ReplicatorG 0024 by attempting to follow ReplicatorG-Skeinforge-RAMPS.

I'm also experimenting with a dev version of RepSnapper.

Important Measurements

For use with firmware as well as software:

  • Overall
    • 3mm feedstock and a 0.50 mm nozzle
    • Stepper motors are 1.8° per step or 200 steps per revolution
    • Driven by Pololu A4983 drivers with 1/16th microstepping
  • X & Y axes
    • 8 tooth pulley using XL drive belt
      • (steps per motor revolution) ÷ (drive belt teeth per revolution) ÷ (belt pitch OR distance between belt teeth) = steps per millimeter
      • 200 (without microstepping) ÷ 8 (default pulley) ÷ 5.08 mm = 4.921 steps per mm
      • With 1/16 microstepping = 78.74 steps per mm
    • 10 tooth pulley (10t XL Pulley for SAE Prusa Mendel by BenJackson) using XL drive belt
      • 200 (without microstepping) ÷ 10 ÷ 5.08 mm = 3.937 steps per mm
      • With 1/16 microstepping = 62.99 steps per mm
  • Z axis
    • 5/16"-18 threaded rod
      • (steps per motor revolution) ÷ (pitch of the thread) = steps per millimeter
      • 200 (without microstepping) ÷ (25.4 ÷ 18 or 1.411) = 141.732 steps per mm
      • With 1/16 microstepping = 2267.72 steps per mm
  • Extruder
    • 5/16" hobbed bolt
      • (steps per motor revolution) × (gear ratio) ÷ (pinch wheel diameter × π)
      • 200 (without microstepping) × (39 ÷ 11 = 3.545) ÷ (7.08 × π = 22.242) = 31.880 steps per mm
      • With 1/16 microstepping = 510.08 steps per mm