<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I would like to hear both of these talks as well as others. Is the robotics meeting link on the TriEmbed site?<br><br>Sent from my iPhone</div><div><br>On Jun 9, 2015, at 3:57 PM, Rodney Radford via TriEmbed <<a href="mailto:triembed@triembed.org">triembed@triembed.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">I have been thinking of giving a talk on motor types and motor control at a future robotics meeting (we meet in the same room on the 1st Monday of the month). <div><br></div><div>I would cover:</div><div><br></div><div> * Basic types of motors</div><div> + R/C servo (both positional and continuous)</div><div> + DC brushed</div><div> + DC brushless (only to describe how they work, but not delve into detail as this is a full talk by itself)<br><br> * Basic control circuits:</div><div> + Simple R/C servo (varying pulse width to control position)</div><div> + Simple on/off of a DC brushed motor (no change direction)</div><div> + Using PWM to control speed (open loop)</div><div> + Using a relay to change motor direction</div><div> + Replacing the relay with an H-bridge</div><div><br></div><div>That should be enough for one session... but the plan is to lead up to the next session where I want to get into closed-loop motor speed and position control:<br><br> * Sensing motor speed/direction</div><div> + analog feedback (generator)</div><div> + optical break or Hall effect sensors</div><div> + quadrature encoders, quadrature + home sensors</div><div> * Basic types of motor control algorithms<br> + on until set point, then off</div><div> + proportional (the P of PID)</div><div> + PI (add the integral term)</div><div> + PD (add the derivative term)</div><div> + PID (all together)</div><div> * More complicated controls</div><div> + PIDs within PIDs (oh my)<br> + changing PID parameters on the fly</div><div><br></div><div>The plan is to show each of the P, PI, PD, and PID graphically, which is what I am working on now - a motor control board that implements PID but also allows me to graph the motor response curve so we can see what happens as we change (or eliminate/add) each parameter.<br><br>This talk may be of interest to the TriEmbed group - if so, you could either attend the robotics meeting, or I could give it again.<br><br>I could do the first talk now, but I am about 2-3 months away from having what I want for the second talk.</div><div><br></div><div>Is there any interest?</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 9, 2015 at 2:44 PM, Shane Trent via TriEmbed <span dir="ltr"><<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Now that is an art!<br>
<br>
Sent from my iPhone<br>
<div class="HOEnZb"><div class="h5"><br>
On Jun 9, 2015, at 1:08 PM, Craig Cook via TriEmbed <<a href="mailto:triembed@triembed.org">triembed@triembed.org</a>> wrote:<br>
<br>
>> I would be interested in giving a mini-talk on electronics terminology.<br>
>> After all, you can't spell Geek without "EE." :-)<br>
>><br>
>> Here are some possibilities, but I need your input...<br>
><br>
> How about "how to read a datasheet?"<br>
><br>
> Sounds like a great talk<br>
><br>
> Thanks<br>
><br>
><br>
> Craig<br>
><br>
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