Wiki source code of RC Servo Mid Position Tutorial

Last modified by Eric Nantel on 2023/01/20 11:38
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1 {{html wiki="false" clean="true"}}
2 <body><table border="0" cellpadding="0" cellspacing="0" >
3 <tbody><tr>
4 <td valign="top" ><font size="2" face="verdana"><b>Servo Mid Position Tutorial.</b></font>
5 <p><font size="2" face="verdana"><b><!--webbot bot="Timestamp" startspan s-type="EDITED" s-format="%m/%d/%Y" -->03/25/2008<!--webbot
6 bot="Timestamp" i-checksum="12594" endspan -->.</b></font></p>
7 <p><font size="2" face="verdana"><b>By James Frye.</b></font></p>
8 <p><font size="2" face="verdana">Building Lynxmotion kits requires adjusting the servo to its mid position (center of rotation). In order to
9 move the servo's output shaft to its mid position, the servo needs to receive 1.5mS, positive-going pulses every 20mS. This tutorial will cover
10 creating the necessary pulses from off-the-shelf controllers.</font></p></td>
11 <td align="center" valign="top" width="320"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/sm150.jpg" border="2" hspace="10" width="320" height="240"><br>
12 <font size="2" face="verdana"><strong>Too cool</strong></font><font size="2" face="verdana"><strong>!</strong></font></td>
13 </tr>
14 <tr>
15 <td colspan="2">&nbsp;</td>
16 </tr>
17 <tr>
18 <td valign="top" ><font size="2" face="verdana"><b>Connecting Power.<br>
19 </b>The first step in getting your SSC-32 or Bot Board ready to control servos is to provide voltage. This is accomplished using either our
20 BATC-01 battery cable or our WH-01 battery cable with switch. If your cable has tinned ends, cut off the tinned part and strip the plastic cover
21 off about 1/4" from the new end. The reason for doing this is the screw terminals can't properly tighten down on a tinned wire. Remember,
22 the red wire is (+) and the black wire is (-).</font>
23 <p><font size="2" face="verdana">For now, make sure the VS=VL jumper is installed, but you may be instructed to remove it later. Attach a
24 charged 6.0-7.2vdc battery to the connector and turn on the switch. The green LED should light on the board if all is well. If not, quickly
25 remove the battery pack and double check your work!</font></p></td>
26 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos00.jpg" border="2" hspace="10" width="320" height="240"><br>
27 <font size="2" face="verdana">With Battery.<br>
28 &nbsp;</font></td>
29 </tr>
30 <tr>
31 <td colspan="2">&nbsp;</td>
32 </tr>
33 <tr>
34 <td valign="top" ><font size="2" face="verdana"><b>SSC-32.<br>
35 </b>To allow custom servo positioning on powerup, the servo controller does not automatically generate pulses.</font>
36 <p><font size="2" face="verdana">Apply 6-7.2vdc to the VS1 terminal and install the following jumpers: VS=VL, VS1=VS2, Both baud for 115.2k, TX
37 and RX to enable DB9 port.</font> <font size="2" face="verdana">Connect a DB9 cable from the board to a free serial port.</font></p>
38 <p><font size="2" face="verdana">You can <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/view/ses-software/lynxterm/" target="_blank">download</a> and run
39 Lynx SSC-32 Terminal. Change the port to your Com port. Click on "All = 1500". Plug a servo into any port with the black wire closest
40 to the outside of the board. The servo controller will generate these pulses until powered down. Another way is the software method: #0 P1500
41 &lt;cr&gt;. This will generate pulses on the channel following the "#" only. More information is available in the SSC-32 manual.</font></p>
42 <p><font size="2" face="verdana">If you are using RIOS-01 or SEQ-01, both programs have this function built in. Consult the users manual for
43 more information.</font></p></td>
44 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos06.jpg" border="2" hspace="10" width="320" height="240"><br>
45 <font size="2" face="verdana">SSC-32.<br>
46 &nbsp;</font></td>
47 </tr>
48 <tr>
49 <td colspan="2" >&nbsp;<br class="pb">
50 </td>
51 </tr>
52 <tr>
53 <td valign="top" ><font size="2" face="verdana"><b>Bot Board / BASIC Atom.<br>
54 </b>Apply 6-7.2vdc to the VS connector and install the VS=VL jumper. Also install the VS jumper for the first four I/O pins. Program the Atom
55 with the following code to generate the pulses on I/O Pin 0. Plug the servo into I/O Pin 0 with the black wire closest to the outside of the
56 board.<br>
57 <blockquote>
58 <div style="padding: .5em; color: black; line-height: 1.1em; border: 1px solid black;">
59 <font face="Courier New" size="2">low p0<br>
60 start:<br>
61 &nbsp;&nbsp; pulsout p0,1500<br>
62 &nbsp;&nbsp; pause 20<br>
63 goto start</font>
64 </div>
65 </blockquote>
66 </font></td>
67 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos03.jpg" border="2" hspace="10" width="320" height="240"><br>
68 <font size="2" face="verdana">BASIC Atom.<br>
69 &nbsp;</font></td>
70 </tr>
71 <tr>
72 <td colspan="2" >&nbsp;</td>
73 </tr>
74 <tr>
75 <td valign="top" ><font size="2" face="verdana"><b>Bot Board / BASIC Atom Pro.<br>
76 </b>Apply 6-7.2vdc to the VS connector and install the VS=VL jumper. Also install the VS jumper for the first four I/O pins. Program the Atom
77 with the following code to generate the pulses on I/O Pin 0. Plug the servo into I/O Pin 0 with the black wire closest to the outside of the
78 board.<br>
79 <blockquote>
80 <b>IDE v8.0.1.3+</b>
81 <div style="padding: .5em; color: black; line-height: 1.1em; border: 1px solid black;">
82 <font face="Courier New" size="2">enablehservo<br>
83 &nbsp;&nbsp; hservo [0\0\0]<br>
84 start:<br>
85 goto start</font>
86 </div>
87 </blockquote>
88 </font></td>
89 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos04.jpg" border="2" hspace="10" width="320" height="240"><br>
90 <font size="2" face="verdana">BASIC Atom Pro.<br>
91 &nbsp;</font></td>
92 </tr>
93 <tr>
94 <td colspan="2" >&nbsp;</td>
95 </tr>
96 <tr>
97 <td valign="top" ><font size="2" face="verdana"><b>Bot Board / BASIC Stamp 2 / BS2-E.<br>
98 </b>Apply 6-7.2vdc to the VS connector and install the VS=VL jumper. Also install the VS jumper for the first four I/O pins. Program the BS2
99 with the following code to generate the pulses on I/O Pin 0. Plug the servo into I/O Pin 0 with the black wire closest to the outside of the
100 board.<br>
101 <blockquote>
102 <div style="padding: .5em; color: black; line-height: 1.1em; border: 1px solid black;">
103 <font face="Courier New" size="2">start:<br>
104 &nbsp;&nbsp; pulsout 0,750<br>
105 &nbsp;&nbsp; pause 20<br>
106 goto start</font>
107 </div>
108 </blockquote>
109 </font></td>
110 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos05.jpg" border="2" hspace="10" width="320" height="240"><br>
111 <font size="2" face="verdana">BASIC Stamp.<br>
112 &nbsp;</font></td>
113 </tr>
114 <tr>
115 <td colspan="2"><br class="pb">
116 </td>
117 </tr>
118 <tr>
119 <td valign="top" ><font size="2" face="verdana"><b>SSC-12.<br>
120 </b>Apply 6-7.2vdc to the red and black wires. If powered correctly, the green LED will illuminate. The pulses are automatically generated. Plug
121 a servo into any port with the black wire closest to the outside of the board.</font></td>
122 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos02.jpg" border="2" hspace="10" width="320" height="240"><br>
123 <font size="2" face="verdana">SSC-12.<br>
124 &nbsp;</font></td>
125 </tr>
126 <tr>
127 <td colspan="2" >&nbsp;</td>
128 </tr>
129 <tr>
130 <td valign="top" ><font size="2" face="verdana"><b>Mini SSC-II.<br>
131 </b>Connect a 9vdc battery to the SSC power input and apply 4.8-7.2vdc to the SVO power input. If powered correctly, the green LED will
132 illuminate. The pulses are automatically generated. Plug a servo into any port with the black wire closest to the outside of the board.</font></td>
133 <td align="center" valign="top" ><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-system/ses-servos/ses-lynxmotion-rc-servo/rc-servo-mid-position-tutorial/WebHome/smpos01.jpg" border="2" hspace="10" width="320" height="240"><br>
134 <font size="2" face="verdana">Mini SSC-II.&nbsp;<br>
135 &nbsp;</font></td>
136 </tr>
137 </tbody></table>
138 </body>
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