Measuring the hole bottom is within 5 thou of each other - I think it’s actuallly better than that as these holes have a burr I haven’t removed.
Awesome. That's the big brother to mine. I'm almost done converting to CNC. Lucky to have paid so little for it. I bought mine new.I paid $260 for everything. I was looking more at them today they are actually 890ozin. I feel like I got a good deal. This system would cost 3 times that right now. Plus it is all wired up and running. Hmm now I have lots of work to do. This is the mill I have. So much for building a mini cnc that I can bring to maker fair.
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Good project! I have an acorn based lathe. Will your rotor encoder support rigid tapping? Eg multiple passes to do threading?Just doing a cnc conversion to my Craftex knee mill, using the Acorn cnc board and Clearpath Nema 34 servo's, direct drive. Motor has been converted to VFD, and just installed a rotor encoder to measure RPM accurately. Post some pic's when I'm done. Now I just have to learn g-code.
It should, basically I used the OMRON E6B2-CWZ1X 2000p/r Rotary Encoder. The Positional count per Rev is about 32000 because I am taking the feed off largest of the pulley on the spindle via a contact wheel. I'll post a pic when I get a chance to take it (some initial fine calibration is required.Good project! I have an acorn based lathe. Will your rotor encoder support rigid tapping? Eg multiple passes to do threading?
link for this? casually searching sees them for $250+ on amazon?It should, basically I used the OMRON E6B2-CWZ1X 2000p/r Rotary Encoder. The Positional count per Rev is about 32000 because I am taking the feed off largest of the pulley on the spindle via a contact wheel. I'll post a pic when I get a chance to take it (some initial fine calibration is required.
I picked acorn because of the software CNC 12 which appeared to be good. So far I like it but the HAAS NGC is better.Did my research, liked that it was Windows compatible (sorry been at computers too long and don't need to learn another set of headaches). Additionally it is plug and play using the add on board from CNC4PC for the Clearpath SDSK. Clearpath was to only choice based on the torque and built in encoding and processing. Based on the basic encoder 0.000125 is possible if all works as designed and the winds in the right direction.
Yes Ebay is where got it. Seem to function fine (I suspect its the actual manufacturer), the bigger is the contact wheel that is giving me a headache at higher speeds.link for this? casually searching sees them for $250+ on amazon?
on ebay it's $45 but I assume it's a chinese counterfeit.
on digikey.ca they are $1000-1500 ! The amazon one must also be counterfeit.
Although you can't see it in the photo, the casting of the head frame didn't allow me to put anything above the pulley. Mine is running 60 pulses per rev IIRC plus the index of course. I've been able to do power tapping with that. The other day I ran it 6 RPM to ream some 3D printed PLA and not melt it while reaming.That take off wheel started as a piece of 5-3/4 x 5-3/4 x1" thick Al 6061 plate. Little bit of Drill press work, little bit of lathe work, some bandsaw to reduce lathe work, more lathe, finally a little more drill press (1-1/2 later) mounted. BTW the take off is friction fit and the encoding is going to work out to about 8000 per revolution. In the original set up it was closer to 33,000.