How many mils would the XYZ movement move for 1.8 degrees turn on the stepper?
Where to buy the Nema stepper motors in Malaysia?
How many coils does this stepper motor have?
If we cut clear plastics or acrylics with this mill, will the surface of the plastics melt, burn or become opaque?
4...If we cut clear plastics or acrylics with this mill, will the surface of the plastics melt, burn or become opaque?
Depends on cutting tools, speeds
5...Can we turn the XYZ movements by hand?
Yes
If you're serious about having a cnc machine, there's Lots of homework to be done.
There are infinite variables involved, so there's no generic answers.
I can advise you on what I use, though...
http://www.artsoftcontrols.com/artsoft/index/index.htm
Control software of choice...
But cncpro is free now...excellent software, but needs DOS...(worth the trouble!)
(Still Mach3 is better, but has the learning curve)
Then you'd need cad software...I use the Vectric stuff for the sheer ease of it...
Not Cheap...But the time saved and versatility of it outweighs that immensely. http://www.vectric.com/
There ARE free alternatives...but you get what you pay for in cad software...[noparse];)[/noparse]
That stuff gives one an Excellent running machine along with Excellent Support.
Support is EX-tremely Valuable!
The controls and software are good for any future larger machines too.
They can also be sold if not needed.
I also have had a very small private support group for the machines for the last year.
I've sent out more than 20. If anyone is interested they can join and ask anything, anytime.
Can the mill make molds for plastic injection if the milling bit is very strong and we cut a little tiny bit at a time?
How much is the shipping to Malaysia?
I couldn't recommend cutting metals until I get time to
try it myself. I'd expect it to work, but I'll need to actually
break a machine to see how much abuse it will take.
(This is assuming aluminum...Not steel.)
Breaking one here is no big deal...I'm all set up to fix or
replace it. That could be too expensive for someone
else.
Shipping to Malaysia seems to be reasonable according
to USPS.com....around $40.
I'm very surprised. But I have no idea about what other
expenses could come from customs, for example.
I don't have a lot of international shipping experience.
For your current screw pitch, how may mils would the bit move for 1 stepper step?
To fix a stepper motor on do we have to dismantle the handles ( for human hand )?
I now think that you need a Propeller to run the controller board, since it is capable of floating point calculations
to enable milling of circles and oval shapes.
william chan said...
I now think that you need a Propeller to run the controller board, since it is capable of floating point calculations to enable milling of circles and oval shapes.
John Hansford said...
I think you're right about the propeller....[noparse]:)[/noparse]
The Propeller is a nice controller. I will not argue that. However, I want to point out that Polywogs claims to have built an “SX 3 axis (soon to be 4 axis) CNC mill 0.0005 acurracy.” He is doing circular interpolation using a cordic method on the SX. The SX, of course, is an 8-bit micro-controller without floating point operations. So, while the Stamp may still be a good choice, the SX and possibly other micro-controllers are actually up the to task of circular interpolation without the benefit of floating point operations.
Here is a picture of a circle I cut on my SuperMill.· The mill is controlled by a Propeller Demo board, driving IB463 controllers running at half-step.
Sid
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ Yesterday is history, tomorrow is a mystery, and today is a gift.
Comments
Where to buy the Nema stepper motors in Malaysia?
How many coils does this stepper motor have?
If we cut clear plastics or acrylics with this mill, will the surface of the plastics melt, burn or become opaque?
Can we turn the XYZ movements by hand?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
www.fd.com.my
www.mercedes.com.my
Post Edited (william chan) : 11/6/2007 11:51:14 AM GMT
Depends on the screw pitch.
2...Where to buy the Nema stepper motors in Malaysia?
No idea on that...search on Google.
3...How many coils does this stepper motor have?
Look here...http://www.cs.uiowa.edu/~jones/step/
4...If we cut clear plastics or acrylics with this mill, will the surface of the plastics melt, burn or become opaque?
Depends on cutting tools, speeds
5...Can we turn the XYZ movements by hand?
Yes
If you're serious about having a cnc machine, there's Lots of homework to be done.
There are infinite variables involved, so there's no generic answers.
I can advise you on what I use, though...
http://www.hobbycnc.com/hcncpropkg.php...requires _Careful!_ soldering
Get the full 3 axis package ...205 oz steppers are fine.
http://www.mpja.com/prodinfo.asp?number=7846+TR
This transformer is cheap and works very well
http://www.artsoftcontrols.com/artsoft/index/index.htm
Control software of choice...
But cncpro is free now...excellent software, but needs DOS...(worth the trouble!)
(Still Mach3 is better, but has the learning curve)
Then you'd need cad software...I use the Vectric stuff for the sheer ease of it...
Not Cheap...But the time saved and versatility of it outweighs that immensely.
http://www.vectric.com/
There ARE free alternatives...but you get what you pay for in cad software...[noparse];)[/noparse]
That stuff gives one an Excellent running machine along with Excellent Support.
Support is EX-tremely Valuable!
The controls and software are good for any future larger machines too.
They can also be sold if not needed.
Hope that's helpful!!
[noparse]:)[/noparse]
John
I've sent out more than 20. If anyone is interested they can join and ask anything, anytime.
http://groups.yahoo.com/group/Fireballcnc/
John
How much is the shipping to Malaysia?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
www.fd.com.my
www.mercedes.com.my
try it myself. I'd expect it to work, but I'll need to actually
break a machine to see how much abuse it will take.
(This is assuming aluminum...Not steel.)
Breaking one here is no big deal...I'm all set up to fix or
replace it. That could be too expensive for someone
else.
Shipping to Malaysia seems to be reasonable according
to USPS.com....around $40.
I'm very surprised. But I have no idea about what other
expenses could come from customs, for example.
I don't have a lot of international shipping experience.
John
To fix a stepper motor on do we have to dismantle the handles ( for human hand )?
I now think that you need a Propeller to run the controller board, since it is capable of floating point calculations
to enable milling of circles and oval shapes.
The propeller can also interface to a SD card.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
www.fd.com.my
www.mercedes.com.my
using 200 steps per rev....360(1 revolution) / 1.8 (step angle) = 200 steps per rev.
12 (screw pitch(12 turns to move 1 inch)) x 200 = 2400 steps per inch in full stepping mode.
4800 in half step mode (2400 x 2)
9600 in 1/4 step mode (2400 x 4)
19200 at 1/8 step mode (2400 x 8)
38400 at 1/16 step mode (2400 x 16)
I'm using 1/4 step mode on one machine, so it takes 9600 steps to
move 1 inch.
My Gecko G203V drivers use 1/10 step mode so with a 1/2-10
screw it takes 20000 steps to move one inch.
This is called "micro-stepping". It makes the motors run much smoother.
Your controller provider would give you more information.
You'd mount small handles to a double shafted motor.
I think you're right about the propeller....[noparse]:)[/noparse]
John
What people get these things to do amazes me!
- Sparks
Sid
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Yesterday is history, tomorrow is a mystery, and today is a gift.
That is why they call it the present.
Don't have VGA?
Newzed@aol.com