These videos display how a particular machine is built and what a CNC router does.
Sunday, September 7, 2014
Specifications and Limitations
The CNC router must be able to cut desired material precisely.
Limitations:
- The material must be wood or soft plastics.
- The parts must be optimized to prevent as much backlash as possible.
- Different parts or software must compensate backlash.
The machine must be able to support 4’x8’ pieces of plywood
Limitations:
- The Table must be larger than 4’x8’ and fit within the desired classroom space.
The CNC router driver motors must work with driver
controller
Limitations
- The wiring between the motors and the controller cannot lie within the cutting area.
The CNC Router needs power.
Limitations:
- The machine must reside where an outlet is or an appropriate extension cable is used.
- The extension cable if used must reside away from people for safety.
Intended users must know how to use the router and software.
Limitations:
- People might not have previous access to such equipment or software.
- People must spend time to learn how to use the machine before operating.
References
CNC
Motors. (n.d.). Cncroutersource.com. Retrieved September 10, 2014, from http://www.cncroutersource.com/cnc-motors.html
CNC
woodworking Machines: Types and Features Buy, Build, Learn. (n.d.). Cncroutersource.com.
Retrieved September 10, 2014, from
http://www.cncroutersource.com/cnc-woodworking.html
Cook,
J. (2013, December 23). Software Advice for Anyone Thinking About a CNC Router.
Hackaday.com. Retrieved September 10, 2014, from
http://hackaday.com/2013/12/23/software-advice-for-anyone-thinking-about-a-cnc-router/
DIY
CNC Router. (n.d.). Instructables.com. Retrieved September 10, 2014,
from http://www.instructables.com/id/DIY-CNC-Router/?ALLSTEPS
Earl,
B. (2014, May 5). All About Stepper Motors. Learn.adafruit.com.
Retrieved September 10, 2014, from
https://learn.adafruit.com/all-about-stepper-motors/what-is-a-stepper-motor
Mraz,
S. (2009, May 6). A Critical Look at Acme, Ball, and Roller Screws for Linear
Motion. Machinedesign.com. Retrieved September 10, 2014, from
http://machinedesign.com/motion-control/critical-look-acme-ball-and-roller-screws-linear-motion
Stepper
Motors vs. Servo Motors vs. Intelligent Motors - The Facts. (n.d.). Torchmate.com.
Retrieved September 10, 2014, from
http://torchmate.com/resource_center/editorials/stepper_motors_vs._servo_motors_vs._intelligent_motors_-_the_facts/
[Untitled picture of a handmade cnc router].
Retrieved September 10, 2014
from
http://hackaday.com/2013/10/24/a-very-professional-homemade-cnc-router/
[Untitled picture of a home work shop]. Retrieved
September 10, 2014
from http://www.cnccookbook.com/CCHomeMachineShops.html
[Untitled picture of an industrial factory setting
with a cnc router]. Retrieved September 10, 2014
from
http://www.manutencaoesuprimentos.com.br/conteudo/4712-caracteristicas-da carpintaria-industrial/
Which
is better, a screw or rack and pinion drive? | CNCRouterParts. (n.d.). Cncrouterparts.com.
Retrieved September 10, 2014, from
http://www.cncrouterparts.com/which-is-better-a-screw-or-rack-and-pinion-drive-p-99.html
Saturday, September 6, 2014
Possible Testing Procedures (Will be Updated)
Introduction:
A CNC router
is a system that requires the ability to cut 4’ x 8’ pieces of wood and fold
and move for storage. The machine precisely cuts wood using a computer to
transmit data.
The material
bed, linear motion, motors, and software will be tested. The final testing
procedure will test the entire system as a whole.
The designer
will test each step in the process.
The testing
takes place in the systems lab. The lab’s conditions relate to the outside
conditions. On average, the lab’s air contains a high salinity and humidity
reading.
Testing Stages:
Testing
Type: Exploratory
Testing
Stage: Preliminary
State of
Solution:
Preconstruction
Condition of
Testing Stage:
Lab Environment
Preconstruction
Tools and
Equipment Required:
None
Testing
Procedures:
1.
Check design for problems.
2.
Does the design meet required specifications?
Testing
Type: Assessment
Testing
Stage: Secondary
State of
Solution:
Off
Stationary
Condition of
Testing Stage:
Lab Environment
During Construction
Tools and
Equipment Required:
· Weights
· Scale
Testing
Procedures:
1.
Load weights slowly onto material bed.
2.
Add more weights until visible stressing of the
machine.
3.
Measure weight on scale.
4.
Record maximum weight.
Testing
Type: Assessment
Testing
Stage: Tertiary
State of
Solution:
On
Stationary machine
Moving rails and bearings
Condition of
Testing Stage:
Lab Environment
During Construction:
Tools and
Equipment Required:
· Volt and Amp Tester
· Computer
· Software (CAD, CAM, Controller)
Testing
Procedures:
1.
Connect all electrical equipment.
a.
Wires to motors from computer
b.
Plug in router
c.
Plug in computer
2.
Use Volt and AMP tester to check electrical
flow.
3.
Process a design file through all three
softwares.
a.
Turn CAD into CAM file
b.
Open CAM in the controller
c.
Submit to machine
4.
Check machine for completion of the design file.
Testing
Type: Assessment and Validation
Testing
Stage: Quaternary
State of
Solution:
On
Stationary machine
Moving rails and bearings
Condition of
Testing Stage
Lab environment
During construction
Tools and
Equipment Required:
· Completed CNC machine
· Drawing Files
· Controller software
Testing
Procedures:
1.
Run different drawing files through machine to
test for alignment and precision.
2.
If not accurate, tweak setting in controller
software to allow for backlash and machine habits.
3.
Test files until the machine produced completely
aligned products.
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