Pretty nice job Sam. I'm testing something similar while I'm finishing to configure the machine I plan to intall in a few days on the Mazak. My goal is to turn low lift camshafts (6.5 mm maximum for now, although 9 mm shouldn't be a problem if the tool has enough relief).
Here's a video of a test I made a few weeks ago using lowpass filter as Peter suggested: https://www.youtube.com/watch?v=kzokOz8uG7M The problem I encountered with lowpass filter is that as I increased the gain I startes loosing some lift so I'm only using a little bit to slightly smooth the signal. In the video I'm using a 1024 CPR simulated encoder but I only exported the cam profile with 64 control points. After that I exported the same cam but with 512 points and the result was a lot smoother. Anyway, I'm still struggling with the component I made since I can't use it with a stepper PIDed configuration without crashing the kernel. I'm using the classic stepgen config and it seems to work ok. El 9 mar. 2020 4:32 AM, "Gene Heskett" <ghesk...@shentel.net> escribió: > On Monday 09 March 2020 02:16:40 John Dammeyer wrote: > > > Ah. See the way I read that document is that it's > > > > halcmd -f -k > > > > and it's not clear what the '\' means. > > > > So I'm guessing there's something in the hal file loaded with a > > loadrt? > > > > http://linuxcnc.org/docs/2.4/html/hal_tutorial.html > > doesn't show polygon. > > > > It's late. I've given up searching for now. Frustrating to not find > > anything online. John > > > > > -----Original Message----- > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > Sent: March-08-20 10:37 PM > > > To: Enhanced Machine Controller (EMC) > > > Subject: Re: [Emc-users] Non-circular boring. Linuxcnc style. > > > > > > Halcmd is an interactive hal command line. -fk just means don't > > > exit if there is an error and use input from a file if specified - > > > if no file is specified use keyboard (standard I/O). (I didn't > > > specify a file) > > > > > > This let's you run Hal commands and see the guts of linuxcnc. Very > > > useful and powerful. I use it all the time. > > > > > > On Mon, Mar 9, 2020, 12:18 AM John Dammeyer <jo...@autoartisans.com> > > > > > > wrote: > > > > So the > > > > http://linuxcnc.org/docs/html/man/man1/halcmd.1.html > > > > says \-f[file] > > > > > > > > halcmd -fk means k is a file? > > > > > > > > I'm confused. > > > > John > > > > > > > > > -----Original Message----- > > > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > > Sent: March-08-20 9:44 PM > > > > > To: Enhanced Machine Controller (EMC) > > > > > Subject: Re: [Emc-users] Non-circular boring. Linuxcnc style. > > > > > > > > > > The polygon Hal component can be enabled/disabled. > > > > > > > > > > Here is me experimenting with parameters > > > > > > > > > > http://electronicsam.com/images/greenmachine/2020-03-07- > > > > > 191256_1920x1080_scrot.png > > > > > > > > > > > > > > > On Sun, Mar 8, 2020, 11:34 PM John Dammeyer > > > > > > <jo...@autoartisans.com> > > > > > > > > wrote: > > > > > > But how is it done then? I mean you wouldn't want X and Y > > > > > > moving on > > > > > > > > you > > > > > > > > > > when you accidentally turn the spindle while tightening the > > > > > > drill > > > > > > > > chuck. > > > > > > > > > > Yet it appeared your turned the tool and the XY axis moved. > > > > > > > > > > > > Thanks > > > > > > john > > > > > > > > > > > > > -----Original Message----- > > > > > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > > > > Sent: March-08-20 9:02 PM > > > > > > > To: Enhanced Machine Controller (EMC) > > > > > > > Subject: Re: [Emc-users] Non-circular boring. Linuxcnc > > > > > > > style. > > > > > > > > > > > > > > The spindle has a 36 tooth gear with quadrature gear tooth > > > > > > > sensors. > > > > > > > > So > > > > > > > > > > only > > > > > > > > > > > > > 144 counts per rev. Partly why it is so noisy. > > > > > > > > > > > > > > On Sun, Mar 8, 2020, 10:30 PM John Dammeyer > > > > > > > > > > <jo...@autoartisans.com> > > > > > > > > > > > > wrote: > > > > > > > > Cool. > > > > > > > > How is this done? As I recall your spindle didn't have > > > > > > > > 1000 > > > > > > > > pulses per > > > > > > > > > > > > rev or anything. Does it just calculate the current angle > > > > > > > > of the > > > > > > > > > > > > spindle > > > > > > > > > > > > > > and then send motion commands to XY? > > > > > > > > Thanks > > > > > > > > John > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > > > > > > Sent: March-08-20 8:18 PM > > > > > > > > > To: Enhanced Machine Controller (EMC) > > > > > > > > > Subject: Re: [Emc-users] Non-circular boring. Linuxcnc > > > > > > > > > style. > > > > > > > > > > > > > > > > > > Exactly > > > > > > > > > > > > > > > > > > On Sun, Mar 8, 2020, 10:16 PM John Dammeyer > > > > > > > > > > > > > > <jo...@autoartisans.com> > > > > > > > > > > > > > > > > wrote: > > > > > > > > > > So was it using the spindle position as you turned it > > > > > > > > > > manually > > > > > > > > to > > > > > > > > > > move > > > > > > > > > > > > > > X > > > > > > > > > > > > > > > > > > and Y? > > > > > > > > > > John > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > > > > > > > > > Sent: March-08-20 7:09 PM > > > > > > > > > > > To: Enhanced Machine Controller (EMC) > > > > > > > > > > > Subject: [Emc-users] Non-circular boring. Linuxcnc > > > > > > > > > > > style. > > > > > > > > > > > > > > > > > > > > > > Using eoffset functionality - I created a small hal > > > > > > > > > > > component > > > > > > > > > > > > that > > > > > > > > > > > > > > > > > calculates a polygon based on the tool orientation - > > > > > > > > > > > moving x > > > > > > > > > > > > and y > > > > > > > > > > > > > > > > > accordingly.. It is based on work that andy did on > > > > > > > > > > > his > > > > > > > > lathe. > > > > > > > > > > > > > > > You enter tool radius, number of sides, inscribed > > > > > > > > > > > radius of > > > > > > > > the > > > > > > > > > > > > polygon. > > > > > > > > > > > > > > > > > > > (still a work in progress - I don't have a way a > > > > > > > > > > > easy to set > > > > > > > > the > > > > > > > > > > > > tool or > > > > > > > > > > > > > > > > > > > polygon orientation.) > > > > > > > > > > > > > > > > > > > > > > based on this formula > > > > > > > > > > > https://math.stackexchange.com/a/41954 > > > > > > > > > > > > > > > > > > > > > > I forgot to copy my current code off the machine.. > > > > > > > > > > > will this > > > > > > > > > > > > week. > > > > > > > > > > > > > > > > > https://www.youtube.com/watch?v=c9tWtEG1Exc > > What you saw, John, when Sam was turning the spindle by hand was the > equivalent of starting a G33.1 canned threading cycle and turning off > the spindle psu before it got more that a good start. So the xy was > still locked to the spindle rotation and would remains locked until it > had reached the target depth. This lock is bidirectional, and the xy > motions would have sequenced in reverse, which I think Sam did turn it > backwards at one point in the video. Conversely, starting the spindle in > reverse would have backed the tool upwards. At exactly the same rate it > was advancing into the hole turning forward. Just one of several bits of > magic that comes with linuxcnc. > > 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) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
