Tormach PCNC 440 + microARC4 4th axis + self centring vise
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- Опубликовано: 11 сен 2024
- There's a lot of interest in Tormach's microARC4 rotary axis, especially when paired with an Xin Diang 2" self centring vise.
I went back through some old videos to see if I could find an example of what this combination can do. If you're interested in this combination, I hope this will convince you of how solid it is. There's more info on the vise and a model of the adapter plate you need to make at xoomspeed.com/C...
I use that same vice on my micro arc. It’s a beast of a sub-$100 vise!
I absolutely agree. they're just ridiculously good.
Hi can you tell me the name of the vice or where to find it?
@@cmarley69 Search eBay for "edm erowa" and I'm sure you'll find it
So how accurate are these micro arcs? How did the chamfers look flipping the block and doing both sides?
the rotary motion is as good as you'd expect from a harmonic drive, so accuracy comes down to setup. You have to get the axis absolutely parallel with the x-axis. It's supplied with a key that does a pretty good job on the 440's t-slots, but to get the alignment down to a thou over, say, 4" takes some effort. Just as well with the vise removed it doesn't impinge on the 440's work envelope. To get it sitting parallel to the table, you'd have to use shims. Mine's out by a perhaps couple of thou over 4" in that respect.
After that, you need to get your wcs origin bang on the rotary axis and you have to repeat that process every time you reference the y/z axes.
Basically the chamfers on that part came out visually spot on. I know they must be a couple of thou out, but you can't see it on a 50mm cube.
Hi, could you do a video on the vice, I have seen them on Ali Express and the look fantastic. What sort of tolerance can they hold?
This video is unlisted, but I think shows what you'd want to know. ruclips.net/video/dIs6RXRroEw/видео.html
I've found this little thing grips very powerfully and has little if any jaw lift. The jaws are serrated, so it leaves a mark and won't necessarily grip 2 parts exactly the same. It's absolutely perfect for 1st op work which is what it's intended for.
I like it enough to have another one mounted on a plate that I can then mount on my table for regular 3-axis work.
Thank you 👍 yes $100 well spent!
Is this connected into the 120v socket?
The microArc has an internal stepper motor. When you buy it for a 440, the kit comes with an additional stepper driver for the motor and that in turn is powered by the same 48V dc supply that powers the x, y and z axes.
What's that roughing tool you're using?
It's one of these www.shars.com/products/indexable-cutting/indexable-milling/7-8-90-degree-indexable-end-mill-oal-4-1-2-apkt-insert
It's fitted with a TTS conversion collar from Tormach that's pinned to prevent it slipping down the shank.