Soil Mixer 2019/Controller: Difference between revisions

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===20Nm Load on Motor===
===20Nm Load on Motor===
20nm load derived on mixer main page in design review section
20nm load derived on mixer main page in design review section
Download Circuit: [[File:SoilMixerFluidSIMCircuits.zip]]


Older simulations: [[/Hydraulic Simulation Archive]]
Older simulations: [[/Hydraulic Simulation Archive]]


{|
{|class="wikitable"
|+style="font-size:150%"|'''Soil Mixer Circuit Simulations'''
!Production-Ready Circuit
!Series Circuit
!Sequence Valve Circuit Closed Center Valve
!Sequence Valve Circuit Open Center Valve
|-
|<html><video width="350" height="350" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/20Nm%20Series-1.webm" type="video/webm"></video></html>
|<html><video width="350" height="350" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/20Nm%20Sequence%20Closed%20Center-1.webm" type="video/webm"></video></html>
|<html><video width="350" height="350" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/20Nm%20Sequence%20Open%20Center-1.webm" type="video/webm"></video></html>
|-
|-
|13.25 GPM through valve. Motor speed up to 4K RPM on cyl retract. When cylinder bottoms out, fluid has no path to tank and flow stops through the system.
|<html><video controls loop src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Series%20Circuit%2012-24-1.webm" height="100%" width="100%"></video></html>
|Whereas the third circuit has difficulty retracting the cylinder under heavy motor loads, this circuit has no such condition. Flow rate through motor significantly decreased when cylinder is traveling as all cylinder flow is lost to tank.
|If the motor is loaded more than 20Nm(maybe 40Nm, the cylinder cannot retract. I'm not entirely sure why this is yet. If the motor is loaded at 20Nm then the circuit behaves well and all flow from cylinder goes to motor during cylinder travel.
|-
|-
!Series Circuit with Flow Control
!Stepping Through This Circuit
!Automated For Viewing Convenience
|-
|-
|<html><video width="350" height="350" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Flow%20Control%20Motor-1.webm" type="video/webm"></video></html>
|{{YoutubePopup|mH2onJqJIl8|big}}
|{{YoutubePopup|xVSR72DBsYI|big}}
|-
|-
|Put the motor in parallel with the cylinder valve put put a flow control on the motor to force flow to the cylinder. This may cause too much heat for the flow control.
|Manually stepping through circuit with narration
|Automated, silent. Cylinder switched using pressure switch
|}
|}

Latest revision as of 15:01, 28 December 2019

This page includes information about the entire electromechanical hydraulic control system for the soil mixer. This is a variant of CEB Press Controller v19.01


Controller Requirements

  • Needs to switch a double acting cylinder while running a hydraulic motor
  • Needs to cycle a dc motor for cement dosing
  • Water mister solenoid

Electronics

  • Mega 2560
  • Relay Shield (3A)
  • External Relays boards for >3A
  • Fused Battery Connection
  • High Pressure Switch

Hydraulics

Hydraulic Calculations

Hydraulic Cylinder Volumes. 2.5x12x1.25 Cylinder
Cap End Volume:((2.5in)/2)^2 * 3.14 * 12in =58.875 cu in
Rod Volume: ((1.25in)/2)^2 * 3.14 * 12in = 14.71875 cu in
Rod End Volume = 58.875 cu in - 14.71875 cu in = 44.15625‬ cu in

Cylinder Travel Speeds
Flow Rate Extend Time Retract Time
5 GPM 3.06s 2.29s
7.5 GPM 2.04s 1.53s
10 GPM 1.53s 1.15s
12.5 GPM 1.22s 0.92s
15GPM 1.02s 0.76s

Hydraulic Diagram


edit


Hydraulic Circuit Simulation

20Nm Load on Motor

20nm load derived on mixer main page in design review section

Download Circuit: File:SoilMixerFluidSIMCircuits.zip

Older simulations: /Hydraulic Simulation Archive

Production-Ready Circuit
Stepping Through This Circuit Automated For Viewing Convenience
http://img.youtube.com/vi/mH2onJqJIl8/0.jpg http://img.youtube.com/vi/xVSR72DBsYI/0.jpg
Manually stepping through circuit with narration Automated, silent. Cylinder switched using pressure switch
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