On Thursday 06 April 2017 15:40:22 Gene Heskett wrote: > Greetings all; > > 1) With a usb extension cable between the radio buttons on the hub, I > was able to collect around 200 megabytes of noise withe usbmon > directed to a file. Moved the radio buttons for both keyboard and > mouse from the extension and hub, to plugged into the pi, did not > check mouse range, but with the pi mounted on the door of the box, and > the door open, I suspect the keyboard signal was probably bouncing off > the closed garage door to get from the keyboard to the button. > However at 26 or so air feet, the keyboard still worked quite well. I > didn't check the mouse range as the pointer is too small to see at > that range. > > 2) watching usb, you see EVERYTHING since the ethernet port is > effectively a plugged in usb to ethernet adaptor, so mixed in with the > keyboard and mouse noise, you also see the every few seconds cups > updating its available printers database. In plain text even. > > 3) jog-inputs are apparently not subject the the max speed slider. I > found this out when I had the jog increment or jog-step-size set for > 20 thousandths. I could easily over run the axis, but that gave the > slow display time to tell me it was moving at 105 IPM once it had > reached cruise velocity, while the slider was set at 36. And of course > at the first bat of a gnats eyelash, it stalled as thats faster that > it can do w/o stalling. This I consider is a bug. But can it be fixed > easily? > > Or am I configured wrong to start with? > > Yes, I see if I convert those figures to inches, I have many times the > steady state run velocity the axis is capable of programmed into Z, > and probably X too but x is busy clamping a felt wiper in place on the > rear of the crossfeed carriage, for a few hours yet so its not been > checked for non-compliance. > > I know Z can run pretty reliably at 90 ipm, so I'll set that as > MAX_VEL to 1.5 in joint1, and scale trajectory down to 45 ipm since I > am using some backlash comp. > > Progress. Back later. > I did some fine tuning, and at one point got an spi protocol error that threw both joints into error.
Funny part is that the error occured at a point on the backplot where both axis's were moving, at around 45 ipm in the center of a small curve in lathe_pawn.ngc. Upset, I tightened up both error's in both joints to 0.0010 and gave it 20% more headroom everyplace else. It has now made about 10 of those lathe_pwn.ngc's w/o further errors. I left it making 50 of them, all out of air of course. :) Now I need some speed out of x, the screen update is only 5 or 6 frames a second. I bugged the debiam-arm list about that a week ago & got told the devs had about washed their hands of the pi's because of the busted broadcom video on it. So unless broadcom throws some better code over the fence, its simply not going to happen. Or pi builds an r-pi 4 with good video there is already good X support for. I am NOT holding my breath for that. I did some look at it testing, and it appears there is room for the taperlock draw/jack screws if I shorten them to 22mm's long. That leaves wrench access into the head of the screw, and TBT, a hole thru the bearing boss base big enough to pass a loooooooong 3/16" allen wrench thru, looks like a PITA to drill but workable after that. Now if the weather would warm back up, the talking heads are saying 3 to 6" of snow in the higher hills east of us tonight, and amazon ships the rest of the bearings, I'll have to get off my duff and go make some bearing pushers. Leaves me time to go get my taxes done so it won't be a total loss. > Thankls all; > > Cheers, Gene Heskett 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
