blog/draft/2009-04-13-reprap.txt

   1 Title: Reprap stepper motor RJ45 pinout
   2 Tags: english, nuug, reprap, 3d-printer
   3 Publish: 2020-01-01
   4 Date: 2009-04-13 10:00
   5
   6 Since my last reprap update, a lot of progress has been made.  I write
   7 this blog post in English instead of Norwegian, because I have some
   8 proposals regarding cabling I would like to reach the entire reprap
   9 community.
  10
  11 I managed to complete the building of the reprap cartesian robot
  12 before Go Open 2009, but ran into some problems when trying to get it
  13 working.  The axes are not moving smoothly, and the motors have
  14 problems pulling the bands with enough force.  More on that later.
  15
  16 <p>When connecting the electronics, I decided to follow the lead of
  17 the next generation of electronics, and use RJ45 connectors to plug
  18 everything together.
  19
  20 I bought connectors at Clas Ohlsson,
  21 <a href="http://www.clasohlson.no/Product/Product.aspx?id=61105401">part
  22 number 38-2224 "Modularuttak RJ 45/splinttilkobl."</a>.  I also got
  23 some from ELFA, part number 42-687-77 "Jack för panelmontage" after
  24 emptying the stock at Clas Ohlson Storo.
  25
  26 I went a bit further and use RJ45 connectors to connect to the stepper
  27 motors and to connect the stepper motor driver cards with the arduino
  28 controller.</p>
  29
  30 <p>For the motor, I decided to pass all motor cables through the RJ45
  31 cable for maximum flexibility in the future, and short the cables used
  32 to change the unipolar motor into a bipolare one on the controller
  33 card side.  I further decided to stay close to the color coding used
  34 in TP cables when connecting them to the RJ45 connector, and thus
  35 connect green with green, blue with blue, orange with red and brown
  36 with black.  This give me the following pinout:</p>
  37
  38 <table>
  39 <tr><th align="left">RJ45</th><th align="left">Stepper motor</th></tr>
  40 <tr><td>pin 1 org/wht </td><td>red/wht</th></tr>
  41 <tr><td>pin 2 org     </td><td>red</th></tr>
  42 <tr><td>pin 3 grn/wht </td><td>grn/wht</th></tr>
  43 <tr><td>pin 4 blu     </td><td>blu  (short with pin 5 red/wht on controller side)</th></tr>
  44 <tr><td>pin 5 blu/wht </td><td>blu/wht</th></tr>
  45 <tr><td>pin 6 grn     </td><td>grn  (short with pin 7 blk/wht on controller side)</th></tr>
  46 <tr><td>pin 7 bwn/wht </td><td>blk/wht</th></tr>
  47 <tr><td>pin 8 bwn     </td><td>blk</th></tr>
  48 </table>
  49
  50 <p>For the connection from the stepper motor controller to the
  51 arduino, I followed the pin numbering used by the IDC connector in the
  52 next generation electronics, mapped to an RJ45 plug:</p>
  53
  54 <table>
  55 <tr><th align="left">RJ45</th>      <th align="left">Stepper motor controller</th></tr>
  56 <tr><td>pin 1 org/wht (unused)</td> <td>VCC</td></tr>
  57 <tr><td>pin 2 org</td>              <td>GND</td></tr>
  58 <tr><td>pin 3 grn/wht</td>          <td>Step</td></tr>
  59 <tr><td>pin 4 blu</td>              <td>Dir</td></tr>
  60 <tr><td>pin 5 blu/wht</td>          <td>Enable</td></tr>
  61 <tr><td>pin 6 grn</td>              <td>Min</td></tr>
  62 <tr><td>pin 7 brn/wht</td>          <td>Max</td></tr>
  63 <tr><td>pin 8 brn (unused)</td>     <td>N/A</td></tr>
  64 </table>
  65
  66 <p>I plan to map the other controller card connections to RJ45 too.
  67 Will try to keep power on pin 1 and ground on pin 2, and put control
  68 signals on the rest.  One sad issue is that the print head controllers
  69 (DC motor, PWM and themerature) in total uses 9 pins - one to many for
  70 the RJ45. :( Guess I will have to find another connector for these.  I
  71 will have to keep an eye on the plans to make print heads
  72 hot-swapable, and see what kind of connector will be used there.
  73
  74 I decided to use one connector for the DC motor controller, and one
  75 for the PWM and temperature controller.  Here is the DC motor
  76 controller pinout.  Decided to keep the directions in one pair and the
  77 PWM signals in another pair.
  78
  79 <table>
  80 <tr><th align="left">RJ45</th>      <th align="left">Stepper motor controller</th></tr>
  81 <tr><td>pin 1 org/wht (unused)</td> <td>VCC</td></tr>
  82 <tr><td>pin 2 org</td>              <td>GND</td></tr>
  83 <tr><td>pin 3 grn/wht</td>          <td>DIR A</td></tr>
  84 <tr><td>pin 4 blu</td>              <td>PWM A</td></tr>
  85 <tr><td>pin 5 blu/wht</td>          <td>PWM B</td></tr>
  86 <tr><td>pin 6 grn</td>              <td>DIR B</td></tr>
  87 <tr><td>pin 7 brn/wht (unused)</td> <td>N/A</td></tr>
  88 <tr><td>pin 8 brn (unused)</td>     <td>N/A</td></tr>
  89 </table>
  90
  91 Here is the PWM and temperature sensor controler pinout.  Decided to
  92 group these two together, as both are connected to the heating chamber
  93 and to save RJ45 connectors.
  94
  95 <table>
  96 <tr><th align="left">RJ45</th>      <th align="left">controllers</th></tr>
  97 <tr><td>pin 1 org/wht (unused)</td> <td>Temp driver VCC</td></tr>
  98 <tr><td>pin 2 org</td>              <td>Temp driver GND</td></tr>
  99 <tr><td>pin 3 grn/wht</td>          <td>Temp driver input</td></tr>
 100 <tr><td>pin 4 blu</td>              <td>PWM driver GND</td></tr>
 101 <tr><td>pin 5 blu/wht</td>          <td>PWM driver PWM1</td></tr>
 102 <tr><td>pin 6 grn</td>              <td>N/A</td></tr>
 103 <tr><td>pin 7 brn/wht (unused)</td> <td>PWM driver PWM2</td></tr>
 104 <tr><td>pin 8 brn (unused)</td>     <td>PWM driver PWM3</td></tr>
 105 </table>
 106
 107  - z axes - remove springs and spacers
 108
 109
 110 Skrivehodeutfordringer
 111 ======================
 112
 113 http://www.futurlec.com/Pictures/HDPIN.jpg
 114
 115 elfa artikkelnummer 43-833-86 eller 43-833-78 ?
 116 43-009-64
 117
 118 varmetrådstørrelse 0.25mm diameter, areal ca. 0.0509mm^2
 119 "AMPMODU hylsa 0,04-0,09 mm²" (43-833-86)
 120
 121 kjøpte "AMPMODU hylsa 0.13-0.36 mm²" 43-833-78, da de måtte bestille
 122 den mindre varianten.
 123
 124 http://renoirsrants.blogspot.com/2009/04/coach-bolt-hack.html
 125
 126 plastsveisetråd
 127 http://www.inter-supply.no/site/maler/x/?case_vis=artikkel&HmenyID=12&artikkelid=15&v_meny2=3
 128
 129
 130 http://objects.reprap.org/wiki/Builders/Alternative_firmware
 131
 132 kapton-tape:
 133  Elfa - 80-899-97 eller 80-900-29, hhv 12 og 19 mm bred, og dyr :)
 134
 135 Elfa - 80-899-97 eller 80-900-29, hhv 12 og 19 mm bred, og dyr :)
 136 <divid> pere: 80-907-07 for 33 mm
 137
 138 ELFA 43-566-08 "Kontakthus 2,54mm, 3-pol"