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 on: Today at 09:37:03 
Started by Bob La Londe - Last post by Dragonfly
A heavily stacked arrangement Smiley

 on: Today at 00:17:17 
Started by Bob La Londe - Last post by Bob La Londe
Had to turn the heads of some 1/4-20 socket head bolts today.  I found they hold quite nicely in a 1/4 inch ER16 collet. 

 on: Yesterday at 20:25:52 
Started by billt - Last post by lloydsp
Those are easy to fix.  I'll let Bill modify it until everyone is happy, before I tackle plugin-izing it. Smiley


 on: Yesterday at 20:09:12 
Started by Bob La Londe - Last post by Bob La Londe
Here is the new Z-Axis for Metal Nibbler 3.  Its going to be a temporary stop gap Z.  The spindle I'll keep, but the linear actuator has some things I don't like.  The problem is its hard to make it the way I would without an actual working machine.  (The Taig is down due to controller issues on one axis.)

This one was cheap and I got it fairly quickly.  There are parts on it from 4 (5 when I get the servo mounted) different manufacturers to allow me to assemble it quickly. 

 on: Yesterday at 18:31:02 
Started by billt - Last post by Dragonfly
Interesting. This simple shape I drew from a rectangle and a circle just for testing causes "division by zero" error at line 83 -> V2.X = 0.
But that's all I can tell at the moment.

 on: Yesterday at 11:48:24 
Started by kiwibrick - Last post by kiwibrick
I haven't got a pic of the motor adapters currently which I should really get.
The cars have an alloy motor mount standard and these little offset plates are screwed to the 540 motor and they move the motor further away from the spur gear to allow bigger pinions than would otherwise fit.
I don't think composite would be viable in this situation, they are only 3.5mm thick and I would need to put alloy inserts in for the 2 mounting screws, and there is also some complication with the temp these motors get to, would need post cured resin of a grade that I don't currently have.

 on: Yesterday at 09:47:04 
Started by billt - Last post by Dragonfly
Thanks for your assistance. It appears I have misunderstood the usage of the '"Swivel Angle" variable Smiley

 on: April 22, 2014, 21:36:13 pm 
Started by billt - Last post by billt
The script function does follow curves exactly.
The location of the "tiny dents" that you have circled in red are at points where polyline segments meet at an angle larger than the value specified by the variable "SwivelAngle" that you can set at the beginning of the script.
The default value is set to 40 (degrees).
If you have a low precision part a better value to try might be 89 (degrees) - you will find that your "tiny dents" on the curved segments will no longer be created.

You are correct, there is currently no overcut at the start/end point.
As I mentioned previously, this would be a good feature to add in a future revision.
You might be able to fake it by using a smaller than actual value for the Offset, although this might affect your precision at the corners.

By the way, you need to use half the width of the knife for the Offset value since this is the distance from the centerline of the knife to the knife tip.  So if measuring the knife with calipers gives 0.25mm use 0.125mm for the Offset value.  Maybe this will correct your uncut end points?

Let me know how you make out with these suggestions.

Cheers - BillT

 on: April 22, 2014, 19:48:27 pm 
Started by billt - Last post by Dragonfly
I am looking at the script code but understand too little of it. Especially because I have no idea about CB API functions and objects.
Is there a way to make it adjust and compensate only real corners and not to make the tiny dents along the curved shapes. I don't need that accuracy for what I intend to do and they disrupt the constant velocity mode.
Also I think it would be useful if it is possible to make the cut overlap between start and end a bit larger. Still there are tiny uncut spikes.
Maybe because the actual knife offset is too small - 0.25 mm.

 on: April 22, 2014, 18:58:52 pm 
Started by jakeson - Last post by Bob La Londe
Nice plaque. 

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