hello all, I am making a personalized plaque with 0.125 tall text approx 0.625 deep. I tried a 30 degree end mill from amana tool running at 18000 rpm, 30 ipm, 20 plunge rate, 0.50% step over. Turns out the very tip of my Vbit broke off and had to order another, different vender this time.
Question, which endmill would be good for such a job to handle very small text in soft wood (pine)?
V/R
me.
For very fine lines I like to use a 15 degree vee bit. For a simple vcarve always use bottom of material or your carving will be distorted if you limit depth. If you need to limit depth use advanced vcarve. I have not used v8 CC beta yet but I understand vcarve is removed and you use advanced vcarve for simple vcarves. If you do an advanced vcarve and the space is too small for a flat end mill the vee bit will be used to clear out any flat spots. With very small font sizes the vee bit will carve everything even if the check box is checked for a flat end mill.
I have used the Candace Manufacturing Groovee Jenny 60 degree bit which is a down cut bit in pine. However a 60 degree vee bit would barely scratch the surface of very small lines. On larger vcarves the down cut bit works very well.
The tips of 15/20 and even 30 degree vee bits are very delicate. So take care when handling them. Some cheap vee bits have rounded noses and will make a vcarve look distorted. Make sure any vee bit you get has a sharp point on it.
thank you very much, I have tried the 60 degree vbit, the text was not very clean as I expected. However, when I used the 30 vbit from amana tools it worked perfectly, however, my VFD max is 24,000 rpm. I think the 30 degree end mill needed more RPM and I suspect that is why the very tip of the endmill broke off after a few seconds of milling my plaque. Maybe the tip got hot, I was going very slow @ 30 ipm to ensure I didnt break the tip.
v/r
I dont have a VFD and only a Dewalt 611 router. I have never run a 15/20 or 30 degree vee bit at 24,000. Why do you think you need more rpm? RPM does not make your cutting better. What makes cutting better is the size of the chips you make between the RPM of the router IPM and depth of cut. Usually making your RPM too high causes problems from heat generation and you will likely make saw dust and not chips. You want chip not saw dust. Maybe some of the other forum members will chime in about recommended F&S for their 15/20/30 degree vee bits.
Here is my custom tools for a 15/20 degree vee bits.
| number | vendor | model | URL | name | type | diameter | cornerradius | flutelength | shaftdiameter | angle | numflutes | stickout | coating | metric | notes | machine | material | plungerate | feedrate | rpm | depth | cutpower | finishallowance | 3dstepover | 3dfeedrate | 3drpm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 703 | Foos | 703 | 703 15 degree vee | vee | 0.25 | 0 | 0.5 | 0 | 15 | 2 | 1.5 | 0 | 8 | 14 | 18000 | 0.05 | 0 | 10 | 14 | 18000 | ||||||
| 704 | Foos | 704 20 Degree Vee | vee | 0.25 | 0 | 0.5 | 0 | 20 | 2 | 1.5 | 0 | 8 | 10 | 18000 | 0.05 | 0 | 10 | 10 | 18000 |
thank you very much I really appreciate that.
Soft wood and fine details are kind of mutually exclusive for any sort of woodworking. If you need to use a soft wood for some reason you might try flooding the surface with extra thin CA glue or shellac prior to machining to improve strength. Iād choose a more appropriate wood as a first choice.
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