#linuxcnc-devel Logs

Jun 25 2021

#linuxcnc-devel Calendar

09:30 AM Roguish: hey all. not sure where to report this..... when running pncconf for a 7i80 config, the hal file has pins as '7i80hd' but when actually running a 7i80 the pins in the bit files are '7i80' without the 'hd' suffix. I recommend altering pncconf.
12:38 PM andypugh_: Roguish: Raise it as an issue here: https://github.com/LinuxCNC/linuxcnc/issues
12:42 PM andypugh_: linuxcnc-build: force build --branch=2.8 0000.checkin
12:42 PM linuxcnc-build: build forced [ETA 1h16m02s]
12:42 PM linuxcnc-build: I'll give a shout when the build finishes
01:01 PM Tom_itx is now known as Tom_L
01:08 PM -!- #linuxcnc-devel mode set to +v by ChanServ
02:15 PM linuxcnc-build: Hey! build 0000.checkin #7916 is complete: Success [3build successful]
02:15 PM linuxcnc-build: Build details are at http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/7916
02:21 PM Roguish_shop: andypugh_, thank you. I will
02:22 PM Roguish_shop: andypugh_, do you have an example of your lincurv ? i'm setting up my spindle VFD and it is not linear....
02:23 PM andypugh_: It’s maybe easier to close the loop with a PID than to apply an open-loop correction?
02:23 PM Roguish_shop: i have a pid loop
02:24 PM andypugh_: In that case you might not need anything else.
02:24 PM andypugh_: But be aware that a spindle-speed PID loop is likely to need to be largely dependent on I and FF0 rather than P or D.
02:25 PM andypugh_: (set the FF0 to be accurate at mid-speed, then let the I correct the linearity)
02:26 PM Roguish_shop: ok, thanks. i'll give that a try. working on it as we chat...
02:38 PM Tom_L: i did a pid loop on mine as well as the PI terms on the vfd itself
02:39 PM Tom_L: neither by themselves made it as good as the two combined
02:39 PM Tom_L: with the VFD itself, i had nothing on the bottom rpm range
02:40 PM Tom_L: no two will be the same but mine is here: http://tom-itx.no-ip.biz:81/~webpage/cnc/configs/NEW_MILL_SHOP_2.8.1/
02:40 PM Tom_L: in new_mill.hal
02:41 PM Tom_L: the new_mill io pinout pdf has the vfd settings at the bottom
02:41 PM Tom_L: 3 main parameters changed from how it was shipped to me
03:00 PM Roguish: Tom_L, I haven't yet gotten to the vfd setting, but probably should very soon. thanks for brining it up.
03:01 PM Roguish: I want the spindle speed to be very accurate at low speed so I can tap. not doing that at higher speed.
03:17 PM Tom_L: i started with the vfd with no pid on linuxcnc
03:18 PM Tom_L: same here on tapping etc
03:18 PM Tom_L: that was why i didn't go with one of the high speed chinaco ones
03:39 PM roguish[m]: i've gotten it a lot closer than it was yesterday. but think I can tweak it in more, probably with the vfd setting.
03:39 PM roguish[m]: still have a lot of wiring to do....
04:28 PM CaptHindsight[m]: anyone recall the history of when NML made it into EMC? Was that before HAL so EMC vs EMC2?
04:33 PM Tom_L: https://forum.linuxcnc.org/41-guis/36920-labview-ui-project-for-linuxcnc?start=60
04:33 PM Tom_L: CaptHindsight[m], nearest i can nail it down
04:37 PM Tom_L: part of the NIST project but separate from EMC?
04:41 PM Tom_L: http://linuxcnc.org/docs/html/common/emc-history.html
04:47 PM Tom_L: good somebody keeps track