So I’ve been having some problems attempting to cut out a sign. When deeper curved carves are made I get some chatter which transfers to the cuts and can be seen and felt.
I’m using the Amazon Chinese 500w 12v DC spindle and an Amana RC-45711 90° bit. I’m making 1mm passes and not setting a depth in the tool properties. My feed rate is 8mm/s which I brought down from 16mm/s and it did make a small difference. I’m running the spindle at 12000 rpm.
Would changing over to the dewalt dw660 with a speed controller give me better cuts? I’m wondering this due to the fact that the collet is shorter and it has higher rpms.
Any help would be appreciated. Also I am on mobile and will post some pictures when I get back to a desktop.
That’s deflection. if your center assembly is solid, then you are exceeding the rigidity of the machine. If you set the path depth to be a bit more shallow, it will take more cuts to carve all the way it, but cutting forces will be lower.
Thanks Aaron, I will lower the depth again and give it another shot tonight. I’m also trying to find information on the carve functions finishing allowance. I haven’t played with it yet but I don’t know if it would make a finishing pass after roughing or if I’d have to run two files one with the finishing allowance and one with out.
That is an absolute monster bit for the machine and your spindle. Try using one of the V-bits from the shop. You are using a router bit used for a very large router ~1.5HP…
That’s what I was afraid of Ryan, What I was looking for was not to have any type of pocketing, so the letters went down into a v profile, but It shouldn’t be a problem, I’ll try again with a smaller bit, thanks for your input.
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That’s what I was afraid of Ryan, What I was looking for was not to have any type of pocketing, so the letters went down into a v profile, but It shouldn’t be a problem, I’ll try again with a smaller bit, thanks for your input.
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Set the depth stepdown of the bit smaller, and it will still carve all the way down, just in more steps.
Aaron has it, you can still use this bit but unfortunately you are probably going to have to decrease the step down. As you approach full depth you are cutting a ton of material at once and the forces are just going to be really high.
Alright alright alright! So I’ve dropped the steps as low as I’m willing to go and no luck, I think you are right Ryan the bit is just too much for the machine. I’m okay with that it will find a good home on my router table.
So I bought a CMT 90 1/2" bit and let me tell you what a difference it has made. I can have this cut out alot quicker and cleaner to boot! Thanks for the help!
If you end up getting another one look for a proper endmill with an up-cutting flute. I would love to know if there is much of a difference with a V bit.
So I’ve attached the photos to this post, I still think it’s odd that the vibrations only occur when making a curved carve.
