<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div><blockquote type="cite" class=""><div class="">On Jan 9, 2019, at 9:03 PM, Khalid Baheyeldin <<a href="mailto:kb@2bits.com" class="">kb@2bits.com</a>> wrote:</div><div class=""><div dir="ltr" class=""><div class="gmail_quote"><div class="">The reason I suspect bad connections is that I changed the controller to a backup</div><div class="">board that I have. Same result. Then other RJ45 cables. Same result. <br class=""></div></div></div></div></blockquote><div><br class=""></div>If you can, throw the motors and mechanicals in your deep freeze for a few hours and then, inside where it’s warm, try to operate it.</div><div> <br class=""><blockquote type="cite" class=""><div dir="ltr" class=""><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">What about the stepper drivers, are they marginally sized and higher current required for stepping in cold temperatures is causing them to fault?<br class=""></blockquote><div class=""><br class=""></div><div class="">They are tiny. NEMA 11 instead of the usual NEMA 17. But they have an 18:1 <br class=""></div><div class="">gearhead which gives them enough torque, and there are others who are using</div><div class="">the same model of motors without issues (not in sub zero temperatures though).<br class=""></div></div></div></blockquote><div><br class=""></div>Any grease or other lubricant used in the gearboxes which may become stiff or become more viscous in the cold?</div><div><br class=""><blockquote type="cite" class=""><div dir="ltr" class=""><div class="gmail_quote"><div class="">I did buy the flat RJ45 cables and the sockets, from eBay, so they may not be the best </div><div class="">out there. But they are the flat ones, which are the most flexible. <br class=""></div></div></div></blockquote><br class=""></div><div>Mine come from Sayal, which I’m sure is also very poor quality. I guess if you had a way to perform a cable test in the cold it would make quick work of this theory. </div><div><br class=""></div><div>If it’s skipping and generally misbehaving and you go out and shove the cable into the socket, holding it there while retesting, does it still skip?</div><div><br class=""></div><div>-A.</div><div><br class=""></div><br class=""></body></html>