Hacking a SX2 Mini mill
by macpod on May.05, 2011, under CNC, How-Tos, Soup, Tool Shed
SX2/CN2 tachometer kit in action
I picked up a SX2 Mini mill recently via Little Machine Shop (They call it the HiTorque Mini Mill 3900). When I received it, I noticed there was a port for a digital tachometer readout on the side of it. I though this might be useful, but felt 125$+ for it was a little excessive for what it was. Atop of this, they were out of stock.
I ended up reverse engineering the protocol, building some less expensive kits, and documented how exactly I figured out the protocol. Along the way, I also discovered how to make the mill run in reverse!
If you wondered how a reverse-engineering problem like this is approached or what tools are used, this could be an interesting read:
2 Comments for this entry
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May 5th, 2011 on 8:33 PM
The link for Little Machine Shop is busted, should be
http://www.littlemachineshop.com/3900
Nice project, would be cool if this link showed anything:
http://macpod.net/misc/sx2_tachometer
I just see:
“You can’t see that! It could have been a trade secret.”
May 5th, 2011 on 8:37 PM
Holy smokes, that was a quick comment!
It should be fixed now. Thanks for catching that.