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--- mcmaster:pr0ncnc [2018/11/19 23:17] – [Motor cables] mcmaster
+++ mcmaster:pr0ncnc [2018/12/26 14:31] (current) – removed mcmaster
@@ Line 1: / Line 1: @@
-pr0ncnc is the standard platform that I use to build my CNC microscopes.  A typical system consists of:
-    * uvscada for high level control
-    * AmScope MU800 camera
-    * Driver box
-      * BBB running machinekit
-      * BBB cape w/ optional CD4050 3.3V => 5V boosters
-        * XYZ output standard
-      * Connected over USB w/ static USB-ethernet bridge IP
-      * Case: Hammond 1591-E
-      * TODO: standard rubber feet
-    * IMS MDrive stepper motors (such as MDrive17 or MDrive23)
-    * Linear stages vary
-    * Step/direction connectors: Combicon 4 pin
-      * TODO: move to mini connectors
-    * Where applicable, bipolar motors use Combicon 5 pin
-    * Newport 39 mirror mount (tip tilt stage)
-BBB bolt pattern
-    * WARNING: not square.  According to breakout.py:
-      * 0.000, 0.000
-      * 0.000, 1.900
-      * 2.600, 0.125
-      * 2.600, 1.775
-    * For 4-40 standoffs into case
-    * Standoffs are CA glued in
-    * Standoffs should not peek out other side
-    * Consider putting Kapton on back in case they stick through slightly
-    * Need tight fit.  Drill size?
-====== Motor connector ======
-Although there is a de-facto DB25 standard for step/direction pulses (from Compumotor?), I don't like DB25 connectors.  Instead I use Combicon connectors since I can quickly wire them up and plug/unplug them.
-#29 drill for panel mount Combicon bolt holes using 6-32 SHCS
-Cable colors
-    * Step+: red (left)
-    * Step-: black
-    * Dir+: blue
-    * Dir-: white (right)
-====== BBB 5V cape ======
-Based on CRAMPS pinout
-{{:mcmaster:brainscope:bbb_breakout_5v.png}}
-P8
-^  Pin ^  CPU GPIO ^  CNC function ^  I/O ^  Color ^  Note |
-|  12 |  gpio1[12] |  X dir  |O |White |  |
-|  13 |  gpio0[23] |  X step  |O |Blue |  |
-|  14 |  gpio0[26] |  Y dir  |O |White |  |
-|  15 |  gpio1[15] |  Y step  |O |Blue |  |
-|  18 |  gpio2[1] |  Z dir  |O |White |  |
-|  19 |  gpio0[22] |  Z step  |O |Blue |  |
-Colors
-    * Dir: white
-    * Step: blue
-I'd like to stick with 5 V CMOS style outputs since all my units can take those
-    * Traditional drivers are optocopulers and take resistor limited +/- 5V inputs
-    * MDrive17, MDrive23 basically 5-24V open drain but can also operate CMOS
-IMS MDrive probably don't take much current (TODO: verify)
-My Compumotor M-Drive requires 20 mA min
-    * CD4050 can typically only source 3 mA or so
-    * HEF4050 can do 20 mA max…borderline
-    * Sparkfun BOB-12009 theoretically can do 220 mA
-Originally I shied away from the BOB, but think I can simplify the soldering process to make it more attractive
-====== BBB pinout ======
-{{:mcmaster:pr0ncnc:p8_pinout.png?600}}
-{{:mcmaster:pr0ncnc:p9_pinout.png?600}}
-====== Camera calibration ======
-Put white piece of paper under camera
-Run manbal.py to get RGB values
-Adjust V4L controls until balanced
-Place V4L control values into microscope.json
-    * see example configs for specific usage
-====== Motor cables ======
-Use 5 pos combicon for bipolar motors (wires: 2 A, 2 B, GND)
-BOM
-  * Molex 1552200235 (Digikey WM15664-10-ND)
-  * Phoenix Contact 1786200 (Digikey 277-5776-ND)
-  * Phoenix Contact 5448640 (Digikey 277-11353-ND)
-Notes:
-  * 6' cables
-  * Cut sheath 2" from ends
-  * Expose wire 3/8"
-Pins:
-  * 1 Black
-  * 2 Brown
-  * 3 Green
-  * 4 Blue
-  * 5 White