{"id":707,"date":"2010-12-29T23:52:32","date_gmt":"2010-12-30T03:52:32","guid":{"rendered":"http:\/\/protofusion.org\/wordpress\/?p=707"},"modified":"2011-06-12T18:21:08","modified_gmt":"2011-06-12T23:21:08","slug":"diy-cnc-progress","status":"publish","type":"post","link":"http:\/\/protofusion.org\/wordpress\/2010\/12\/diy-cnc-progress\/","title":{"rendered":"DIY CNC Progress"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Since my last post, I have completed my junction box and I have prepared 3 motor\/speed controller assemblies. I have acquired a second leadscrew to use for my Y-axis, and the electronic portion of the construction (except for limit switches) is complete. Now I can focus on the physical construction of the machine.<\/p>\n

Update [6\/12\/11]:<\/strong> I now have all 3 motors up and running with leadscrews, and parts for both an X and Y linear bearing setup (pillow block on precision ground rod for Y axis, heavy-duty precision angle iron and captive rollers for X-axis). The Z-axis is still up in the air for now. I’ll post more information about materials in the near future.<\/p>\n

<\/strong><\/p>\n

Junction Box<\/h3>\n

The junction box is made from a stripped Cisco router, which acts as a great enclosure with integrated 5v\/12v switching power supply. The integrated supply means I don’t need a USB connector to grab power from the controlling computer for powering encoders and other circuitry, which is quite convenient.<\/p>\n

\"CNC<\/a>

Junction box - 2 parallel in, 4 cat5 and 1 aux out. First 3 cat5 ports are for each axis, the last cat5 port is for the E-stop, and the "Serial 1" port is for future use.<\/p><\/div>\n

The “Serial 1” port is currently not in use, but I might end up using it for turning my power supplies on and off from EMC2, as well as for additional inputs such as a handheld controller, spindle output, and\/or DRO.<\/p>\n

Servos and Controllers<\/h3>\n

I have 3 servo assemblies ready to go, although I am unsure if I will use one of these heavy-duty servos for \u00a0my z-axis. I have done some additional calibration of PID loops, and I still need to work on software backlash compensation.<\/p>\n

\"Servos<\/a>

Servos for each axis attached to speed controllers. The controllers are Victor 883's, really not the tool for the job, but they work well enough for my needs.<\/p><\/div>\n

I will post additional information and CAD drawings when I get more work done on the physical design. I have some rough CAD sketches, but they are dimensionless at the moment.<\/p>\n","protected":false},"excerpt":{"rendered":"

Since my last post, I have completed my junction box and I have prepared 3 motor\/speed controller assemblies. I have acquired a second leadscrew to use for my Y-axis, and the electronic portion of the construction (except for limit switches)…<\/span><\/p>\n

Read more ›<\/a><\/div>\n

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