Greetings everybody; I am in the process of bringing a nearly 70 yo Sheldon lathe back to life, useing an raspberry-pi 3b for the machine controller.
However, I have now had 5 different keyboards plugged into it, some wired, some wireless, and none of them can give me a dependable response to a key, and the error seems much worse for the key-up event. When driving the machine by hand as we often do for one-offs, missing a keyup event can be disastrous for the part being made because it keeps on cutting until you've given that, or another key, a quick tap to stop the unwanted motion. There is something funkity in the usb keyboard handling that can get much worse with a reboot, or get almost perfect with a reboot. Its all uptodate a/o yesterday. The psu is a 4 amp box, making 5.07 volts solidly. Verified with a 100 Mhz scope. What can I do to fix this? 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>
