On Friday 18 August 2017 10:57:36 Les Newell wrote: > Another one from the vault... > > This component will control a spindle with adjustable acceleration and > deceleration. > It is designed for use with non-servo spindle drives that have > separate fwd/reverse inputs, such as DC drives and inverters. > If a spindle encoder is available it is can tailor the acceleration > and deceleration to the spindle load. > If not the spindle speed is simulated. The component allows for > gearboxes with up to 16 gears. Each gear has individual control of > speeds, acceleration, driver gain and direction. > > I originally wrote this for my lathe as it makes the lights in my > workshop dim if it starts up at full acceleration. > > Les This looks like it could be useful on my sheldon, or even on TLM as its 1 hp dc motor is being controlled by one of the Pico pwm-servo's. Both have fairly high count encoders, so that data is available.
This I am assuming could replace the currently used PID module on TLM. On TLM, only 2 gears, but 8 on the sheldon even if I have yet to actually do any work with the backgear engaged as I've found the motor doesn't seem to overheat when not subjected to any huge torque boost, it can run at 7.5 Hertz, pulling well enough to get the job done. Even at that low frequency, the slow rise past that point, set in the vfd, results in a fairly brutal start. However I see an RTAPI call used, and that current Jessie install is running the Sheldon just fine with a -uspace build running on the "4.4.4-rt9-v7+ #7 SMP PREEMPT RT" kernel. I only have 2 threads, the usual 1 millisecond servo-thread, and a 100 Hertz jog-thread. Can this be adjusted to build and run in the jessie preempt-rt environment? And, will it build and run as is on the wheezy installs running the 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian 3.4.55-4linuxcnc i686 GNU/Linux kernel? Thank you, Les. 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-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
