<div dir="ltr">I think I'd lose the softpot too, and use some kind of belt/pulley to turn a rotary pot/encoder</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 7, 2019 at 9:58 AM thresholdpeople via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>The thing with CNC gantry systems like 3D printers is that most lower end ones use stepper motors for both the drive and positioning, so running them in reverse won't be possible to create a control voltage based on position with out a whole lot of extra circuitry. However they may often have parts like linear bearings, precision-ish shafts, and all sorts of other hardware that could be re-purposed. <br></div><div class="gmail-m_296273726060696236protonmail_signature_block gmail-m_296273726060696236protonmail_signature_block-empty"><div class="gmail-m_296273726060696236protonmail_signature_block-user gmail-m_296273726060696236protonmail_signature_block-empty"><div><br></div></div><div class="gmail-m_296273726060696236protonmail_signature_block-proton gmail-m_296273726060696236protonmail_signature_block-empty"><br></div></div><div><br></div><div>Check out Author & Punisher - <a href="http://www.tristanshone.com/" target="_blank">http://www.tristanshone.com/</a> - he makes awesome controllers, and has one or two that are as you're describing, Pete. He's pretty open about construction and functionality.<br></div><div><br></div><div>‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐<br></div><div> On Friday, June 7, 2019 9:55 AM, Pete Hartman <<a href="mailto:pete.hartman@gmail.com" target="_blank">pete.hartman@gmail.com</a>> wrote:<br></div><div> <br></div><blockquote class="gmail-m_296273726060696236protonmail_quote" type="cite"><div dir="ltr"><div dir="ltr"><br></div><div><br></div><div class="gmail_quote"><div dir="ltr">On Fri, Jun 7, 2019 at 7:07 AM bbob <<a href="mailto:fluxmonk@gmail.com" target="_blank">fluxmonk@gmail.com</a>> wrote:<br></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"><div dir="ltr">i'd go wireless - bluetooth or ble from whatever controls are on the carriage, and a time-of-flight sensor to measure the carriage position. there's probably a lot of hardware bits you could repurpose from folks developing diy 3d printers for the carriage mechanics.<br></div><div class="gmail_quote"><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"><br></blockquote></div></blockquote><div><br></div><div>I'm not sure wireless would be practical for within-the-module communications in a Euro module or standalone controller meant to interface with Euro..... <br></div><div><br></div><div>3D printer carriages would be a good source of inspiration though.<br></div><div><br></div><div>The linear bearings at McMaster look really interesting, I'll have to spend some time digging around in that stuff.<br></div><div><br></div><div>Thanks<br></div><div><br></div><div>Pete<br></div></div></div></blockquote><div><br></div>_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Quincas Moreira<br>Synth Diy Guy</div></div></div>