copy paste fail.. encoder.N.position-interpolated
sam On 7/16/2012 2:53 PM, sam sokolik wrote: > out of curiosity are you using? > ENCODER > > *encoder.*/N/*.position-interpolated* float out > > Position in scaled units, interpolated between encoder counts. Only > valid when velocity is approximately constant and above > *min-velocity-estimate*. Do not use for position control. > > That is supposed to smooth out the position between encoder counts. (for > lower count encoders) > > sam > > > On 7/16/2012 2:43 PM, Steve Blackmore wrote: >> On Sun, 15 Jul 2012 22:44:45 -0500, you wrote: >> >>> Steve Blackmore wrote: >>>> Same thing here too with G33. LinuxCNC is coats of paint better than >>>> Mach at threading, but it's not right. Twitchy is the best description I >>>> can give, >>>> >>>> I have two CNC lathes, they are radically different with hardware but >>>> both behave the same - they jitter really bad. >>>> >>>> It was originally reported years ago, with no response :( >>>> >>> Hmm, strange! I have been rigid tapping on two machines for a couple >>> years with >>> LinuxCNC. One machine has a super-oddball spindle encoder with 6912 >>> counts/rev, >>> so I can understand why that one has no problems. But, the Bridgeport >>> has an >>> encoder made by putting gear tooth sensors on the spindle bull gear, and >>> it has >>> only 324 quadrature counts/rev. But, it taps great, using G33.1 >>> There are no growling noises or other problems I can see or hear. >>> I do tend to do the tapping fairly fast, using 1000 RPM typically on the >>> 4-40 taps, but have run it from 200 up to 1200 RPM without trouble. >> Hi Jon - encoders here are only 90 and 120 ppr respectively as they are >> connected via parallel port as I had problems with higher value encoders >> being read reliably at anything more than a thousand revs or so. >> >> It almost seems that every time it gets an encoder pulse it gives the Z >> axis a kick. The faster you go the less noticeable it is, but at slow >> speeds it's poor and sounds like what Gene described. >> >> Steve Blackmore >> -- >> >> ------------------------------------------------------------------------------ >> 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 >> Emc-users@lists.sourceforge.net >> 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 > Emc-users@lists.sourceforge.net > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
