I used a 1/4 inch End Mill (got a rough cut), then a 1/4 inch ball nose while using the rounding gadget. With the 1/4 inch end mill with a 40% stepover I expected a rough cut. With the 1/4 inch ball nose I used a 25% stepover. (I expected a smoother cut).
So is the stepover the problem or could it be something else?
(I also created a straight line, but I posted that in the gadget's section, that is why there is a pencil mark on the wood).
Thanks in advance.
Harvey
Rough cut on rounding gadget
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Re: Rough cut on rounding gadget
1/4 inch ball-end cutter with a 1/16 inch inch stepover:
Looks a fair match to the wood piece.
Looks a fair match to the wood piece.
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Re: Rough cut on rounding gadget
Thank you, I'll give it a try tomorrow.
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Re: Rough cut on rounding gadget
That is what I had 1/16 inch or .0625 or 25%. I'll reduce it to .05 or 20% tomorrow.
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Re: Rough cut on rounding gadget
I very seldom use the rounding gadgets. This was done with the spiral wrap gadget. It will round a 18" long 4.25" square to 3" diameter round with a 1/4" end mill, 30% stepover (.075") and .125" pass depth leaving 2" on each end.
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- Round 4.25 square to 3 in.crv
- (172.5 KiB) Downloaded 47 times
Steve
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Re: Rough cut on rounding gadget
Hi Harvey,
After looking at your pictures and further contemplation, and assuming you're using a flat end mill. I believe it is your stepper count for your A axis.
Try this. Place a square or round stock of material (as large as you can accommodate in the fourth axis) in your fourth axis. Place mark on material and a pointer that is mounted to your table (something that will move). Enter this Gcode in your controller G01 A3600 F100 . This will result in the stock turning 10 times around which will multiply any error you have by 10 times now check your pointer to the mark you made and determine how accurate your a axis is operating. If you see a significant difference you need to adjust the number of steps for your A axis.
I hope this helps.
After looking at your pictures and further contemplation, and assuming you're using a flat end mill. I believe it is your stepper count for your A axis.
Try this. Place a square or round stock of material (as large as you can accommodate in the fourth axis) in your fourth axis. Place mark on material and a pointer that is mounted to your table (something that will move). Enter this Gcode in your controller G01 A3600 F100 . This will result in the stock turning 10 times around which will multiply any error you have by 10 times now check your pointer to the mark you made and determine how accurate your a axis is operating. If you see a significant difference you need to adjust the number of steps for your A axis.
I hope this helps.
Thanks,
Jim
Jim
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Re: Rough cut on rounding gadget
Steve
I downloaded your file. I you look at the simulation and rotate the piece of wood, there will be a straight line
going down your project. It's not a big deal as it can be sanded out. I was just wondering if there is a way to avoid it if possible.
I downloaded your file. I you look at the simulation and rotate the piece of wood, there will be a straight line
going down your project. It's not a big deal as it can be sanded out. I was just wondering if there is a way to avoid it if possible.
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Re: Rough cut on rounding gadget
It isn't possible to have a vertical "seam line" with a continuous spiral cut. I'm not sure why it shows up in the preview. Notice the line shows up even on the uncut sections. If you zoom in close the line disappears.
Steve
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Re: Rough cut on rounding gadget
I think what you are seeing is an artefact of the software trying to wrap a flat representation into a cylindrical one. The "line" is the seam where the material texture wraps around. It's readily apparent if you change the material to a horizontal grained one such as this bamboo:
The real proof is to turn on the toolpath preview and see if there is any dip in the toolpath:
In this case there is none.
The real proof is to turn on the toolpath preview and see if there is any dip in the toolpath:
In this case there is none.