Thank you Joe! Just like I though, and I did hook up those same curves , when I was figuring if I could use steppers as cheap inputs on something like a DJ console... Instead of DC maybe some kind of neutral pattern could help analyzing and use up much less energy from a supply! Still I figure it must be possible! And using the right kind of math it might express itself even trivial! I felt enlightened when I heard great master Dan Winter (The Purpose of DNA | Dan Winter - YouTube 120:17 www.youtube.com/watch?v=3DVPLGN0yIDTg) probably conceived of the application of the CEPSTRUM algorithm for eeg analysis when he was developing motor controllers in his fathers company. Basically spectral derivatives of the frequency content of the energy density would probably make the force content in mechanical or electrical form predictable enough - but I still feel without a learning neuronal algorithm you would never be sure enough to present gnosis about all those vectors! I'm looking forward to hear about other workarounds how I could get 'gnosis' on my MegaRAMPS I just got to control the Delta Robot (3d printer)? On 3/10/15, IVP wrote: >> I wonder how a 'lost step' would look and if the voltage >> measurement of the phases while not driven might provide >> hints if and before it happens? > > Possibly. Voltage developed is going to be relevant to speed. > > The driver knows the speed that the motor *should* be stepping > at, because it supplies the pulses. It can also tell if the rotor has > slipped (lost step) by monitoring the undriven coil, although the > ease of doing that will depend a lot on the type of motor and how > much the coils interact > > Here's something I devised for a learning project > > http://www.piclist.com/techref/io/sensor/pos/enc/stepper_as_encoder.htm > > Moving the motor(s) manually and recording the coil outputs > allows you to replicate the movement under power later > > Joe > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.5751 / Virus Database: 4299/9263 - Release Date: 03/09/15 > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 Tobias Gogolin Tel. D1 (49) 0151 5187 5210 Tel. D2 (49) 0152 0839 5060 skype: moontogo messenger: usertogo@hotmail.com You develop Sustainable Ranch Technology at http://tech.groups.yahoo.com/group/SURA-TECH an Open Source Electric Motor/Alternator at http://groups.yahoo.com/group/Performance_Axial_Flux and an Open Source Motor Controller at http://groups.yahoo.com/group/GoBox --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .