On Thursday 29 June 2017 21:41:45 Jon Elson wrote: > On 06/29/2017 06:31 PM, Tom Easterday wrote: > > Should the backlash parameter in the .ini file be positive or have > > the sign of the input_scale (aka encoder scale)? I don't see > > anything in the docs regarding this but did find a brief forum post > > that suggested it should have the same sign. I haven't tested it, > > but am wondering if someone knows...? If it should follow encoder > > scale this should be documented methinks...and since it is now > > ambiguous should probably be documented regardless. > > I believe it should always be a positive number. > > Jon > That has always been my experience too, but I have never changed the sign of an encoders 'scale' since my use has been restricted to spindle controls except for my handwheels on this Sheldon lathe conversion.
The only thing I've found "odd" feeling is that because its all setup assuming a positive thread on the x screw, the encoder crank then turns ccw to advance the cutter into the work. The natural tendency is an acclimated thing because most x drive screws are left hand threaded. So at first it felt backwards, But I am getting used to it because the markings on the dial are such that a ccw turn from zero to say 89, if the dial scale is gain set at .001" per "click" and its currently touched off to the actual measured diameter, which is lets say 11 thou from the targeted size, its as easy to turn it 11 thou in either direction to get to the desired size, so I pretend its a right hand threaded screw, and turn it 11 thou ccw, or to .x89 on the dial. OTOH, I've been accused of being odd most of my life. ;-) I think it would be a one character change in the right place in the .hal file to reverse that. BTW, I got another of those sub confirmation requests for the -devel list today from srcforge. Anybody else? Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
