1) make a hal check, that disable drive if more than 5-10 consecutive sample period with maximum drive output without any encoder change
2) if you use a hal encoder (brushless motor), use it as second encoder, and cut motor power if more than about 20° of error between both theses are not perfect solution, but are quite simple. Le 23.05.2012 08:08, Jeshua Lacock a écrit : > Greetings, > > I turned on the power to my system today and my 180 pound gantry shot full > speed crashing hard into the end of my table. > > It hit with so much force it actually lifted the front two legs of the 500+ > pound table 6+ inches off the floor! Yikes! > > Luckily the machine only suffered minor damage, but needless to say I really > would like to avoid this from ever happening again. > > I was a stumped at first as the last time I used it everything was stable. It > turns out that I had a loose connection to the encoder. I am going to soldier > the wires on the pins of the encoder to prevent that from happening again, > but I was wondering if there is anything I can do to disable motor power in > the event a connection to a encoder is lost. > > I understand why it happened - without the encoder live the motor was just > attempting to position itself at 0. > > I am guessing there is not an easy way to detect this condition, but I wanted > to see if anyone else has any thoughts on the subject. > > > Thanks, > > Jeshua Lacock > Founder/Engineer > 3DTOPO Incorporated > <http://3DTOPO.com> > Phone: 208.462.4171 > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
