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| *Needs to cycle a dc motor for cement dosing | | *Needs to cycle a dc motor for cement dosing |
| *Water mister solenoid | | *Water mister solenoid |
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| | =Electronics= |
| | *Mega 2560 |
| | *Relay Shield (3A) |
| | *External Relays boards for >3A |
| | *Fused Battery Connection |
| | *High Pressure Switch |
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| =Hydraulics= | | =Hydraulics= |
| ==Hydraulic Diagram== | | ==Hydraulic Calculations== |
| <html><iframe src="https://docs.google.com/presentation/d/1ScpptOBN8ljrSdcZd_iyKdNUiskhitRu5VUAuOlNQTg/embed?start=false&loop=false&delayms=3000#2" frameborder="0" width="960" height="749" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe></html>
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| [https://docs.google.com/presentation/d/1ScpptOBN8ljrSdcZd_iyKdNUiskhitRu5VUAuOlNQTg/edit?usp=sharing edit]
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| ==Hydraulic Circuit Simulation==
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| '''Hydraulic Cylinder Volumes.''' 2.5x12x1.25 Cylinder <br/> | | '''Hydraulic Cylinder Volumes.''' 2.5x12x1.25 Cylinder <br/> |
| Cap End Volume:((2.5in)/2)^2 * 3.14 * 12in =58.875 cu in <br/> | | Cap End Volume:((2.5in)/2)^2 * 3.14 * 12in =58.875 cu in <br/> |
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| |0.76s | | |0.76s |
| |} | | |} |
| | ==Hydraulic Diagram== |
| | <html><iframe src="https://docs.google.com/presentation/d/1ScpptOBN8ljrSdcZd_iyKdNUiskhitRu5VUAuOlNQTg/embed?start=false&loop=false&delayms=3000#2" frameborder="0" width="960" height="749" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe></html> |
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| | [https://docs.google.com/presentation/d/1ScpptOBN8ljrSdcZd_iyKdNUiskhitRu5VUAuOlNQTg/edit?usp=sharing edit] |
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| | ==Hydraulic Circuit Simulation== |
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| ===20Nm Load on Motor=== | | ===20Nm Load on Motor=== |
| Check out these videos first. 20nm load derived on mixer main page in design review section
| | 20nm load derived on mixer main page in design review section |
| {|
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| |+style="font-size:150%"|'''Soil Mixer Circuit Simulations'''
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| !Series Circuit
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| !Sequence Valve Circuit Closed Center Valve
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| !Sequence Valve Circuit Open Center Valve
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| |<html><video width="100%" height="100%" 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>
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| |<html><video width="100%" height="100%" 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>
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| |<html><video width="100%" height="100%" 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>
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| |13.25 GPM through valve. Motor speed up to 4K RPM on cyl retract.
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| |This circuit behaves nicely methinks
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| |Favorite so far. Please tell me what I'm missing.
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| |}
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| ===12/19/2019 (Getting Better Models)===
| | Download Circuit: [[File:SoilMixerFluidSIMCircuits.zip]] |
| {|
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| |+style="font-size:150%|'''Cylinder/Motor Circuits with Gear Pump'''
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| !Series Circuit - 2500PSI Bypass Valve
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| !Sequence Valve Circuit 1 Open Center Valve
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| !Sequence Valve Circuit 2 Closed Center Valve
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| |<html><video width="100%" height="100%" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Series%202500Psi%20Main%20Bypass%20Valve-1.webm" type="video/webm"></video></html>
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| |<html><video width="100%" height="100%" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Sequence%20Valve%20Circuit%201000Psi%20Open%20Center%20Valve-1.webm" type="video/webm"></video></html>
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| |<html><video width="100%" height="100%" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Sequence%20Valve%20Circuit%201000Psi-1.webm" type="video/webm"></video></html>
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| |Motor gets no flow when cylinder bottoms out
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| |1000PSI Sequence Valve Setting
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| |1000PSI Sequence Valve Setting
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| !Sequence Valve Circuit- Changing Variables
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| !Sequence Valve Circuits with Loaded Motor
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| !Series Circuit with Loaded Motor
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| |<html><video width="100%" height="100%" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Changing%20A%20Sequence%20Valve%20Circuit-1.webm" type="video/webm"></video></html>
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| |<html><video width="100%" height="100%" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Loaded%20Motor%20Sequence%20Valve-1.webm" type="video/webm"></video></html>
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| |<html><video width="100%" height="100%" loop controls ><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Series%20Circuit%20Loaded%20Motor-1.webm"></video></html>
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| |In this video the sequence valve is set to ~500psi and I change parameters in the circuit including external torque on motor.
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| |Sorry about the audio. Interesting results. The load on the motor may be low because the hammers pivot out of the way. I'm not sure how to go about calculating it but I could figure out the minimum diameter of the rotor (hammers pivoted) and start there.
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| |}
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| ===12/18/2019 (Lesser Quality Models)===
| | Older simulations: [[/Hydraulic Simulation Archive]] |
| Using demo version of FluidSIM
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| {| | | {|class="wikitable" |
| |+style="font-size:150%|'''Series Circuits''' | | !Production-Ready Circuit |
| !Series Circuit with three way flow controller on motor
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| !With flow (q) and pressure (p) during the simulation
| | |<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> |
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| |<html><video width="100%" height="100%" loop controls muted><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Series%20Circuit%201-1.webm" type="video/webm"></video></html>
| | !Stepping Through This Circuit |
| |<html><video width="100%" height="100%" loop controls mute><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Series%20Circuit%202-1.webm" type="video/webm"></video></html>
| | !Automated For Viewing Convenience |
| |}
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| {|
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| |+style="font-size:150%|'''Sequence Valve Circuits'''
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| !Using a pressure relief valve in the simulator as a sequence valve.
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| !Outlet from cylinder valve is plumbed through a check valve to motor.
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| ! | |
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| |<html><video width="100%" height="100%" loop controls mute><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Mixer%20Sequence%20Valve%20Circuit%201-1.webm" type="video/webm"></video></html> | | |{{YoutubePopup|mH2onJqJIl8|big}} |
| |<html><video width="100%" height="100%" loop controls mute><source src="https://github.com/CabbageBreath/CabbageBreath.github.io/raw/master/Soil%20Mixer%202019/Mixer%20Sequence%20Valve%20-%20check%20valve.webm"></video></html> | | |{{YoutubePopup|xVSR72DBsYI|big}} |
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| |high pressure remains at the pump outlet throughout simulation. something must be missing from the system or the valves aren't set right. | | |Manually stepping through circuit with narration |
| | Increases motor flow during retraction of cylinder. Interesting effect- I didn't expect it. This circuit isn't great because pump outlet pressure is constantly above 2700psi. | | |Automated, silent. Cylinder switched using pressure switch |
| |} | | |} |
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| In both the above videos the setting of the two pressure relief valves changes motor speed and cylinder travel speed. I try to set it to minimize flow through main bypass valve.
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| =Electronics=
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