CNC Circuit Mill/V2 Design Rationale: Difference between revisions
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*Belts stretch and have low velocity ratio | *Belts stretch and have low velocity ratio | ||
=Axis Supports= | |||
*'''Selected''' - Precision Shafts for ease of manufacturing and direct mounting | |||
*Precision V-Rails | |||
*Precision Extrusions | |||
Revision as of 03:20, 31 March 2012
Major Frame Type
- Selected - Mobile gantry design (XYZ all linked) allows tremendous scaling potential.
- Mobile bed (X alone, YZ linked) requires a greater non-axis frame to support both X and YZ; scales ineffectively.
Minor Frame Type
- Selected - Blocks on plate (Non-axis frame is a plate; X axis begins with 4 blocks on this plate)
Axis Drive
- Selected - Stepper motors provide high resolution in a simple open-loop system
- AC or DC motors with encoders necessitate complex closed-loop control systems
Spindle Drive
- Selected - Brushless DC Motor has maintenance-free operation, over 90% efficiency, commutator-free long lifetime, precision speed control possible, quiet operation
- Brushed DC Motors require regular maintenance, short lifetimes, noisy operation
Rotary-to-Linear
- Selected - Leadscrew and Nut for high velocity ratio and lifetime operation
- Belts stretch and have low velocity ratio
Axis Supports
- Selected - Precision Shafts for ease of manufacturing and direct mounting
- Precision V-Rails
- Precision Extrusions