GearHeads Forum

Also look at CNC Router Parts designs...cncrouterparts.com

I built the CRP4896 Router 2 years ago (960 oz-in steppers with 3.2:1 reduction, Leadshine digital drives and a 3hp water cooled spindle..
it is very sturdy and has performed flawlessly...
I have about $6 grand invested.

I can cut large ...

Interesting article about Plasic Gears
http://kbam.geampod.com/KBAM/Reflection ... 106_12.pdf

I am working on a set much larger for a kinetic art project...I will post when done..

Large plastic gears CNC cut from 1/2" Starboard..
The piece was a bit warped so they don't line up perfectly..
but mesh Ok..the square gear is just over 10" across..

http://youtu.be/Z5SMCoDLKu4

Ok..I will give it a try
Also use Mach3.

Saved from Gearotic cnc output...
If I saved as a dxf and run it thru Cut2D it cut perfectly smooth??

Large Logarithmic I cut on my CNCRP 4896 ..
Cut from 3/16" Plexiglas.... overall dimensions are 20" x 16"...going to cut its mate tomorrow....

Turned out perfect...only problem was the TP direct from GM caused bad jerking when the teeth were cutting....had to slow from 120 IPM to about 40..

So I ...

For some reason when I toolpath a non circular gear and run simulation or in Mach4 the tool pauses, raises up and then down in Z as it is makes every pass...

I down loaded the older version and it "cuts" properly...dropping the Z the proper pass depth as it goes around inside the gear ??

Also ...

I see plenty in stock for the Negator springs...

Different Torques ...Here is an example...$27.69

Spring Torque
5.5 lb-in

Fatique Life
2500 Cycles

Spring Length
175"

Spring Thickess (t)
0.01"

Spring Width (W)
0.625"

Material
301 Stainless Steel

Drum Size(storage)
1.28"

Drum Size ...