I’m having some issues with the corners of my fonts. I’m running a two stage carve - rough pass is a 1/8 up spiral, detail pass uses the 60 degree vbit.
I’m zeroing my z-axis using the z-probe. z-axis is square to the waste board.
Nothing in this thread helped.
I’m at a loss, any help is appreciated. Thanks
I’m still having issues and I’m a little surprised no one had feedback. Dumb question maybe? Or not enough info? I do understand I’m not owed help but it would be nice all the same
Since my last post, I have built a new table for my xcarve. Everything else has remained the same:
- depth per pass is .01
- feedrate is 50
- plunge rate is 20
- Y axis is parallel with the waste board
- Y axis is square to the X axis
- I’m zeroing my Z-axis using the z-probe.
- Z-axis is square
- all v-wheels have been adjusted so there is no play…anywhere.
- belts are tight.
I have reached out to support. Not much help this time. Every other time support has been great. I’m at a loss and could really use some assistance…
Recent pics of test carve below:
From looking at the photos I’d suggest maybe your 60 deg bit is not actually 60 degrees. There is a video on @PhillipLunsford channel that shows how to do a test carve to accurately measure the angle. It looks like a bit of a process, but if nothing else is working it should be worth a try. Hopefully Phil can recall which of his many useful videos is the one I mean.
In (my own unsubstantiated) theory it looks like the bit isn’t finishing the outer parts of the letters, i.e. it’s a more closed angle than 60.
It just occurred to me, try doing part of the carve on a piece of scrap but set up your bit as being 57 degrees instead of 60 and see if it looks any better.
When the corners are rounded like that, it almost always means your Z zero is too low on your vbit. Run a test with the Z set higher.
This is really to account for a flat tip on the vbit.
I tried your suggestion - didn’t help. I appreciate the input though!
Thanks for that! How do I set the Z higher?
If you’re used to using the probe with Easel, the easiest way would be to put a few pieces of paper underneath your probe. Unless you know the diameter of the flat point, just try 0.2mm and test.
I’d run a simple square test until you’re getting sharp corners.
To learn your bit specifics I´d run 3-5 tests with incremental Z-zero.
Simply zero as you´d normally do but jog the bit up 0.1mm before confirming home position (work zero)
Repeat test, with 0.2, 0.3, …, 0.5mm Z-offset and see which value that give you the crispest corners With such small offset you´ll also realize that thickness variations of the material to be carved can have big impact.
Not every font is ‘v-carvable’. Ensure you’re using a proper font.
I bought an Amana 90* bit and the problem is solved. I’ll never understand why Inventables puts so much time and money into producing an amazing machine w/amazing support and then sends out shitty bits. At any rate, I’m a happy camper now
And some fonts simply should never be v-carved - comic sans, I’m looking at you!
Poor Comic Sans - never invited to parties and always the last one picked to play ball