1/16 or 1/8 carving time

[mwhatch]

It seems that when I change from a 1/16 to 1/8 caving bit there is basically no didfference in carving time. I would think the 1/8 bit should cut the carving time in half as with a conventional CNC machine. Am I getting something wrong.

[lynnfrwd]

Until today there has not been a 1/8" carving bit available. So, I'm assuming u r referring to the 1/8" cutting bit which is not meant for carving. It is for cut outs.


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[SteveEJ]

Connie,
I think we are talking about the Pattern Bit maybe?

53378

[SteveNelson46]

I'm confuddled! You can select the 1/8 inch ballnose (pattern bit) from the board settings, pattern bit area and yet (until today) it isn't available. Does this mean we can buy the 1/8 inch ballnose bit now?

[SteveEJ]

The CW Store shows 1/16" and 3/16" carving bits but no 1/8". I bought a 1/8" carving bit from a commercial vendor but must admit I haven't used it yet. I guess what Connie is saying is they are now carrying it (and be on the store page soon?)..

[mwhatch]

That is what I was talking about. A 1/8 ball nose pattern bit. I used a precise bits tapered 1/8 ball nose bit with that 2 setscrew adapter you can get on eBay. It did a nice cave. Why is it an option in he pull down list if it was not available and made no difference in the time? Will that be something to look for in the next software update?

Thanks

[brdad]

Until today there has not been a 1/8" carving bit available. So, I'm assuming u r referring to the 1/8" cutting bit which is not meant for carving. It is for cut outs.


It's funny - this has come up before, one side says there never was an 1/8" carving bit, others saying there is. My guess is at some time there was such a bit. I bought my machine second-hand but unused and there was an 1/8" carving bit with it, and I'm pretty sure the original owner didn't buy any extra (Non-CW) accessories. Maybe it was a short-term offering?

I've only used the 1/8" carving bit once, by mistake on a lithophane, and it didn't come out good which makes sense since the 1/16" bit was selected and there's too much detail in a lithophane. Maybe someday I'll have a big enough carve to use it.


http://forum.carvewright.com/attachment.php?attachmentid=26654&d=1234191770

[chief2007]

I have and use a 1/8 carving bit on some projects that need more detail than the 3/16 but less than the 1/16 bit. I do this to extend the life of my 3/16 and 1/6 carving bits.

I Got it from Soigeneris and I pressed it into a Carvetright adapter. Works great for that type of application.

[RMarkey]

The 1/8" carving bit is used for educators carving balsa or basswood CO2 cars. We only sell the bit to educators, afaik. Specifically, the bit is programmed to be a straight shaft, and longer than the 1/16" carving bit. As a result, it runs slower than the 1/16" bit.

[mwhatch]

I think somebody missed the boat here. There has been a lot of projects I would have like to try, but did not because of the long carve times. Cutting the time in half with a 1/8 inch bit would have been the ideal solution. I am surprised it was not incorporated in from the beginning.

[RMarkey]

Mechanical limitations of the machine prevented us from basing the quality & speed of a carve on the radius of the bit.

[lynnfrwd]

1/8" carving bit is NOW available. Along with new set of carbide bits for CT spindle.

(thought it was live last night)


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[fwharris]

1/8" carving bit is NOW available. Along with new set of carbide bits for CT spindle.

(thought it was live last night)


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http://store.carvewright.com/product.php?productid=23747&cat=291&page=1&jmid=19034&j=274458919
Just got the note!

Is there a list of other materials?

The CarveWright 1/8" ballnose carving bit allows for faster carvings in ONLY soft materials such as basswood or foam.

[lynnfrwd]

http://store.carvewright.com/product.php?productid=23747&cat=291&page=1&jmid=19034&j=274458919
Just got the note!

Is there a list of other materials?

The CarveWright 1/8" ballnose carving bit allows for faster carvings in ONLY soft materials such as basswood or foam.


No list. Balsa seems to do just fine. These are the main ones.


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[brdad]

So how does the machine know you're carving balsa or foam board, or does the machine just carve faster when you choose the 1/8" bit? I think the answer is obvious, but I can see people selecting it unsuspectingly, and there does not seem to be any pop-up warning in the software when it is selected. And then there are those who wish to use the bit in other materials?

[mwhatch]

So the machine can push a 3/16 carving bit but not a 1/8. Why not split the difference on feed and speed and give us that option?

[lynnfrwd]

So the machine can push a 3/16 carving bit but not a 1/8. Why not split the difference on feed and speed and give us that option?

The 3/16 is a much heftier bit. Anything harder than suggested could break the bit. Even the 1/16 carving is tapered and heftier. This one is straight.


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[bergerud]

Mechanical limitations of the machine prevented us from basing the quality & speed of a carve on the radius of the bit.

By "mechanical limitations" I think Metallus may be referring to the limitations on z truck acceleration. There is a limit to how fast the z truck can move up and down as it follows a pattern.


It seems that when I change from a 1/16 to 1/8 caving bit there is basically no didfference in carving time. I would think the 1/8 bit should cut the carving time in half as with a conventional CNC machine. Am I getting something wrong.

Maybe the question should be: why can the 3/16 bit carve twice as fast? Is the x feed rate, the y feed rate, or both rates which are faster?

[mwhatch]

I am going to beat this dead horse one more time. A tapered 1/8 bit is very stout. If the X axis step size was doubled that of the 1/16 rate, and all other settings stayed the same, would that not cut the carve time in half. I would think the machine is stout enough to do that. OK I'm done. I promise not to bring it up again.

Morton

[lynnfrwd]

We do not sell a tapered 1/8" carving bit. It is a straight ball nose bit.


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[lynnfrwd]

If u guys have a tapered 1/8" carving bit, I don't know where it came from. I've been here since beginning of '08 and have never heard of one.


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[mwhatch]

This is where I got mine.
http://www.precisebits.com/products/carbidebits/taperedcarve250b4f.asp

[chief2007]

This is where I got mine.
http://www.precisebits.com/products/carbidebits/taperedcarve250b4f.asp


Here is where I got mine - http://www.soigeneris.com/PreciseBits_Tapered_Carving_Tools-details.aspx

I have used it to carve preminum pine and it has done an excellent job.

[lynnfrwd]

Then I guess it's just a matter of...since we don't sell it, the machine (or firmware to be more accurate) is not set up for it.

I'll ask if they have tested it and why not using it.


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[mwhatch]

Sure would be a plus for the machine.

[AskBud]

Review post #9.
AskBud
http://forum.carvewright.com/showthread.php?20713-1-16-or-1-8-carving-time&p=177654#post177654

[liquidguitars]

I been using the 3/16" ball and 3/16" mill bit to carve tops the results in the raster speed department is worth the setup.