CNC Circuit Mill/V2 Design Rationale: Difference between revisions

From Open Source Ecology
Jump to navigation Jump to search
No edit summary
No edit summary
Line 1: Line 1:
=XY Axes Frame Design Rationale=
=Major Frame Type=


*The major functions of the XY Axis Frame are to provide rigid mounting surfaces for the precision shafts and leadscrews of the X and Y axes.
*'''Selected''' - Mobile gantry design (XYZ all linked) allows tremendous scaling potential.


*A good way to ensure stability of the Y axis is having a second storey. Given that premise, a '''cube''' design makes for ease of manufacturing.
*Mobile bed (X alone, YZ linked) requires a greater non-axis frame to support both X and YZ; scales ineffectively.


=Axis Support=
=Minor Frame Type=


*The function of the axes supports are to stabilize the components that are being moved with the drive
*'''Selected''' - Blocks on plate (Non-axis frame is a plate; X axis begins with 4 blocks on this plate)
 
*One option is '''precision shafts and bearings'''
 
*Another option is '''precision linear slides and V-grooved rollers'''
 
=Drive=
 
*The function of the drive is to move components
 
*One option is '''Stepper motor, leadscrew, leadscrew nut'''
 
*Another option is '''Stepper motor, pulley, tensioning pulley, belt'''
 
=Spindle Frame=
 
*The spindle system needs to mount a motor and hold the a driveshaft with 2 bearings for over 20,000 rpm.
 
*The easiest way to ensure alignment of the 2 bearings is to house the driveshaft within 1 part. Meanwhile, the motor can be mounted on another. Both parts need to be secured together in position.
 
*Let's start with 1 rectangular bar, 1 flat bar, and 1 angle:
 
[[Image: rectflatangle.jpg|500px]]
 
*The idea here is that the motor can be mounted on the angle; meanwhile the driveshaft can be held inside the rectangular bar by 2 ball bearings, 1 at each end. The flat bar is there to secure the angle and rect. bar together.
 
*However, if the desire is to hold the driveshaft at the top and bottom, a C-Channel can replace the block, with various implications.
 
*Here is a visual example:
 
[[Image: spindlechannel.jpg|500px]]

Revision as of 02:26, 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)
Retrieved from "https://wiki.opensourceecology.org/index.php?title=CNC_Circuit_Mill/V2_Design_Rationale&oldid=58458"