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XYZ Cell
Presentation Kwang Lim Single Axis Bench Test XYZ Cell Finished - - PDF document
Presentation Kwang Lim Single Axis Bench Test XYZ Cell Finished - - PDF document
Presentation Kwang Lim Single Axis Bench Test XYZ Cell Finished Mold XYZ Cell Require Development and Workflow Casting of machine structure Design of mold using 2D acrylic sheets Assemble mold Assemble lead screw, precision
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XYZ Cell
Finished Mold
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Require Development and Workflow
Casting of machine structure
Design of mold using 2D acrylic sheets Assemble mold Assemble lead screw, precision shaft into mold Mix plaster Pour plaster into mold Wait for 45 minutes Detach from acrylic sheet mold Allow to cure for one day
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Cost and Benefits
Machine Structure (~ $60 for 3 axis)
Structure is ¼ cost of entire XYZ cell (~ $1000 for 3 axis)
Low cost machine structure
< $20 per axis
Requires only 1 acrylic mold to produce many machine structures
No oven drying
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Plaster Disaster Development
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Plaster Disaster Mold
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Plaster Disaster XY axis Top Mold
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Plaster Disaster XY axis Details
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Z Carriage Mold
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Z Axis
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Shuttle and Yankers
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Completed PD
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PD Repeatability Test
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Driving Mechanisms
Capstan and Belt Drive Belt Drive Lead Screw Drive
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Lead Screw Concept
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Lead Screw Drive Demo
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Software
Linux CNC
Does not work on notebook
Fab@Home
Work notebook
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Power Electronics
Allegro A3984
Improving batwing power dissipation
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Selection of sense resistors and reference voltage
Rtop 10K and Rbottom 7K
Rs = 0.5 Ω
Vref = 2 V
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A3984 Microstepping
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Speed Control
Non-Linear
ATMega88 Timer Interrupt
Taylor Series Approximation
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Air Assist Compressor Water Cooled To Radiator Exhaust
Laser Machine Concept
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Laser Tube – CO2
40W CO2 Laser Power Supply
40W CO2 10600nm Laser Tube
Water Pump
$1200 (Ebay)
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Cooling system for CO2 Laser
$320
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Fiber Laser
Compact Fiber Laser
1.6W
US$20,000
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Used Fiber Laser
20 W 1565nm US$399 1 W 830nm US$149 20 Watt 808nm US$399.95
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What Next?
Acceleration and deceleration code for ATMega88
Laser cutting using ~800 nm laser
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