Thank you to help in my cnc router project
Posted by
Wilfrid Blais
on 2000-07-24 08:28:51 UTC
Hello,
I'm in process to do myself, all I can do, cnc router for a low cost .
I am looking for a machine as fast and heavy (for low vibration) as I can
get.
I have attached some sketches and specifications in web format.
You will see there what I have in mind.
I plan to do a scale plan on AutoCAD of this.
But first it is essential to have a good specification for each component.
My problem is this.
There are a lot of questions and formulas to find the good servo motor, ball
screw's dimension, what is the torque, what is the pitch, what is the
speed,...etc...
How to solve the mysteries of Computer Numerical Control :-)
It is frustrating to me.
The hardiest material I expect to work with is aluminum.
That gives 1.56 oz/in cube, hardier material seem to hard for my cnc router.
An excessive example will be:
continue extrusion in 4'X 8'X 20" aluminum plate, obviously I will not be
using that.
For certain people the machine seems very large. Actually, a lot of my
project needs larger pieces not only in aluminum, but wood, plastic, and
soft material...
I found this spec. can be very good for my project:
SPECIFICATIONS
Z-Axis Travel (T) 20"
Max load 10 lb
Ball screw and double linear bearing 30" of travel
Y-Axis Travel (T) 4' on table + 2' extended outside the table
Max load ??
Ball screw and double linear bearing 8' of travel
Max load ??
Repeatability ±0.0004"
Accuracy ±0.003 /12"
Maximum Z-Axis Load 75 lbs
Rapid Load 700 in I min
Cutting Speed Depend of material 400 in I min
Resolution 0.0002'
Table Flatness 0.008' /12"
Thrust Force at low speed Servo motor 250 lb
After I have completed my scale plan, I will try to find this major
component on the market.
I found that could be a good test to calculate the Torque needed to
accelerate the masses, overcome the friction, viscous resistance, etc...
I tried to read all the design notes I found, it is interesting but that
takes a long time.
My budget is low. I believe it will be a good investment for us.
Thank you for your time!
Wilfrid Blais
Mailto:smv@...
[Non-text portions of this message have been removed]
I'm in process to do myself, all I can do, cnc router for a low cost .
I am looking for a machine as fast and heavy (for low vibration) as I can
get.
I have attached some sketches and specifications in web format.
You will see there what I have in mind.
I plan to do a scale plan on AutoCAD of this.
But first it is essential to have a good specification for each component.
My problem is this.
There are a lot of questions and formulas to find the good servo motor, ball
screw's dimension, what is the torque, what is the pitch, what is the
speed,...etc...
How to solve the mysteries of Computer Numerical Control :-)
It is frustrating to me.
The hardiest material I expect to work with is aluminum.
That gives 1.56 oz/in cube, hardier material seem to hard for my cnc router.
An excessive example will be:
continue extrusion in 4'X 8'X 20" aluminum plate, obviously I will not be
using that.
For certain people the machine seems very large. Actually, a lot of my
project needs larger pieces not only in aluminum, but wood, plastic, and
soft material...
I found this spec. can be very good for my project:
SPECIFICATIONS
Z-Axis Travel (T) 20"
Max load 10 lb
Ball screw and double linear bearing 30" of travel
Y-Axis Travel (T) 4' on table + 2' extended outside the table
Max load ??
Ball screw and double linear bearing 8' of travel
>X-Axis Travel (T) 8'Ball screw and double linear bearing 8' of travel
Max load ??
Repeatability ±0.0004"
Accuracy ±0.003 /12"
Maximum Z-Axis Load 75 lbs
Rapid Load 700 in I min
Cutting Speed Depend of material 400 in I min
Resolution 0.0002'
Table Flatness 0.008' /12"
Thrust Force at low speed Servo motor 250 lb
After I have completed my scale plan, I will try to find this major
component on the market.
I found that could be a good test to calculate the Torque needed to
accelerate the masses, overcome the friction, viscous resistance, etc...
I tried to read all the design notes I found, it is interesting but that
takes a long time.
My budget is low. I believe it will be a good investment for us.
Thank you for your time!
Wilfrid Blais
Mailto:smv@...
[Non-text portions of this message have been removed]