Re: [Emc-users] Mini-itx 64bit mother board with parallel port

I just looked around. There seem to be many at this price point of just under $200 that all have 6 Watt CPUs in them and several have parallel ports. Anyways, sub-$20 Intell machines for industrial use seem to by plentiful. Much better then a Raspberry Pi for not much more However if I

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On 2/2/22 22:38, Chris Albertson wrote: About disk drives... We've all seen how a Linux Demo CD can boot and run off the CD using RAM as a "fake" disk drive. Tis is how all the Linux installs are done or if you want to just try Linux and not write anything to you hard drive. It is also po

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On 2/2/22 22:25, Chris Albertson wrote: They use a really tiny ATX power supply that convert the 12 volt input to whatever the ATX pins are. These things cost about $20 The power supply is some small it is built into the cable https://www.amazon.com/Power-Supply-Htpc-Mini-box-Mini-itx/

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

About disk drives... We've all seen how a Linux Demo CD can boot and run off the CD using RAM as a "fake" disk drive. Tis is how all the Linux installs are done or if you want to just try Linux and not write anything to you hard drive. It is also possible to boot from a network server, like

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

They use a really tiny ATX power supply that convert the 12 volt input to whatever the ATX pins are. These things cost about $20 The power supply is some small it is built into the cable https://www.amazon.com/Power-Supply-Htpc-Mini-box-Mini-itx/

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On 2/2/22 20:41, gene heskett wrote: There is however, one detail that would discourage me, its already EOL, came out in q4-15, lifespan 4 years, so its approaching 2 years since last shipped. Where is the support, I never got that page to load. Hmm, yeah that is worrying. I ordered it before

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

I On 2/2/22 20:08, Chris Albertson wrote: I followed that link.Wow, that is a good deal. Especially when you look at the power supply. It uses a 12 volt barrel jack and a large size wall-wort. The CPU burns all of 6 Watts.It could run on battery power. It is good to look for low-po

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On Wednesday, February 2, 2022 9:08:01 PM EST Chris Albertson wrote: > I followed that link.Wow, that is a good deal. Especially when you > look at the power supply. It uses a 12 volt barrel jack and a large > size wall-wort. The CPU burns all of 6 Watts.It could run on > battery power

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

I followed that link.Wow, that is a good deal. Especially when you look at the power supply. It uses a 12 volt barrel jack and a large size wall-wort. The CPU burns all of 6 Watts.It could run on battery power. It is good to look for low-power PCs if they are going to run all day, eve

Re: [Emc-users] Stepper PID

In case anyone is interested, here’s a scope capture of the step pulse train with and without the DPLL configured. ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On Wednesday, February 2, 2022 6:31:50 PM EST Andy Howell wrote: > On 2/2/22 16:31, gene heskett wrote: > > On Wednesday, February 2, 2022 4:42:22 PM EST Andy Howell wrote: > >> I was hoping to update to a recent Debian and LinuxCNC version. > >> However, I have a 32bit motherboard. This is for our

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On 2/2/22 16:31, gene heskett wrote: On Wednesday, February 2, 2022 4:42:22 PM EST Andy Howell wrote: I was hoping to update to a recent Debian and LinuxCNC version. However, I have a 32bit motherboard. This is for our school, so I'm trying to contain cost by just replacing the motherboard. A

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022, gene heskett wrote: Date: Wed, 02 Feb 2022 17:43:23 -0500 From: gene heskett Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Stepper PID On Wednesday, February 2, 2022 5:21:34 PM EST Peter C. Wallace wrote

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On 2/2/22 15:49, andy pugh wrote: On Wed, 2 Feb 2022 at 21:45, Andy Howell wrote: Any suggestions for a 64bit mini-itx motherboard? Where are you? Try the board finder here: https://www.mini-itx.com/store/category?type=motherboard The left hand column lets you filter for p-port or p-port h

Re: [Emc-users] Stepper PID

On Wednesday, February 2, 2022 5:21:34 PM EST Peter C. Wallace wrote: > On Wed, 2 Feb 2022, Thaddeus Waldner wrote: > > Date: Wed, 2 Feb 2022 15:45:16 -0600 > > From: Thaddeus Waldner > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > > > > > To: "Enhanced Machine Controller (EMC)" >

Re: [Emc-users] Stepper PID

> > > The problem is that the PID loop makes bogus velocity corrections because > of > position sample time jitter (which may be as high as a few hunderd usec on > RPI4 Ethernet) > > I suspect that you are not using the DPLL, or that it is not setup > properly. > For a RPI4 I would suggest these se

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On Wednesday, February 2, 2022 4:42:22 PM EST Andy Howell wrote: > I was hoping to update to a recent Debian and LinuxCNC version. > However, I have a 32bit motherboard. This is for our school, so I'm > trying to contain cost by just replacing the motherboard. > > Any suggestions for a 64bit mini-

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022, Thaddeus Waldner wrote: Date: Wed, 2 Feb 2022 15:45:16 -0600 From: Thaddeus Waldner Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Stepper PID > I suspect that you are not using the DPLL, or that it is n

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022, Thaddeus Waldner wrote: Date: Wed, 2 Feb 2022 15:45:16 -0600 From: Thaddeus Waldner Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Stepper PID > I suspect that you are not using the DPLL, or that it is n

Re: [Emc-users] Mini-itx 64bit mother board with parallel port

On Wed, 2 Feb 2022 at 21:45, Andy Howell wrote: > Any suggestions for a 64bit mini-itx motherboard? Where are you? Try the board finder here: https://www.mini-itx.com/store/category?type=motherboard The left hand column lets you filter for p-port or p-port header at the bottom. Don't select bo

Re: [Emc-users] Stepper PID

> > I suspect that you are not using the DPLL, or that it is not setup properly. > For a RPI4 I would suggest these settings: > > > setp hm2_7i76e.0.dpll.01.timer-us -200 > set hm2_7i76e.0.stepgen.timer-number 1 > > These should reduce the stepgenb position sampling jitter to a > fraction of 1

[Emc-users] Mini-itx 64bit mother board with parallel port

I was hoping to update to a recent Debian and LinuxCNC version. However, I have a 32bit motherboard. This is for our school, so I'm trying to contain cost by just replacing the motherboard. Any suggestions for a 64bit mini-itx motherboard? Thanks, Andy

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022, gene heskett wrote: Date: Wed, 02 Feb 2022 14:43:07 -0500 From: gene heskett Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Stepper PID On Wednesday, February 2, 2022 1:57:33 PM EST Peter C. Wallace wrote

Re: [Emc-users] Stepper PID

On Wednesday, February 2, 2022 1:57:33 PM EST Peter C. Wallace wrote: > On Wed, 2 Feb 2022, Thaddeus Waldner wrote: > > Date: Wed, 2 Feb 2022 01:39:29 -0600 > > From: Thaddeus Waldner > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > > > > > To: Enhanced Machine Controller > > Subj

Re: [Emc-users] 2.8 or 2.9?

I am happily running 2.8.0 with 4 homing switches to auto align the gantry (Gatton CNC). Works great. At the moment I am cutting lexan candy molds for the wife. Dave On Wed, Feb 2, 2022, 00:38 Andy Howell wrote: > Hello, > > I maintain a gantry style CNC router for our high school robotics t

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022, Thaddeus Waldner wrote: Date: Wed, 2 Feb 2022 01:39:29 -0600 From: Thaddeus Waldner Reply-To: "Enhanced Machine Controller (EMC)" To: Enhanced Machine Controller Subject: [Emc-users] Stepper PID ??Hi, I have a pi4 running the 2.8.2 iso. I have it connected to a Mesa

Re: [Emc-users] 2.8 or 2.9?

On 2/2/22 12:15, Sebastian Kuzminsky wrote: On 2/2/22 10:03 AM, Andy Howell wrote: I based my impression of it getting close from reading mails about progressing in the Debian new release queue. The project to get LinuxCNC included in the main Debian distribution is totally decoupled from

Re: [Emc-users] 2.8 or 2.9?

On 2/2/22 10:03 AM, Andy Howell wrote: I based my impression of it getting close from reading mails about progressing in the Debian new release queue. The project to get LinuxCNC included in the main Debian distribution is totally decoupled from the project to make the next release of LinuxC

Re: [Emc-users] Stepper PID

Many times with steppers, if the sound seems to go away, it didn't. You only move the frequency to a range your ears can't detect. Remember that the sound is likely not a primary frequency but maybe a harmonic or "beat" frequency and those would move unpredictable, or at least unintuitively. I'm

Re: [Emc-users] 2.8 or 2.9?

On 2/2/22 04:20, andy pugh wrote: On Wed, 2 Feb 2022 at 05:38, Andy Howell wrote: I maintain a gantry style CNC router for our high school robotics team. Tonight our hard disk died. I need to decide what version to install. From reading the list, it looks like 2.9 is close to release. My pre

Re: [Emc-users] 2.8 or 2.9?

On 2/2/22 02:24, gene heskett wrote: On Wednesday, February 2, 2022 12:15:59 AM EST Andy Howell wrote: Hello, I maintain a gantry style CNC router for our high school robotics team. Tonight our hard disk died. I need to decide what version to install. From reading the list, it looks like 2.9

Re: [Emc-users] Stepper PID

They sound smooth enough at PID=100, but that was low speed, what do they sound like at full operating speed? On Wed, 2 Feb 2022 at 14:19, Thaddeus Waldner wrote: > > copy-paste from terminal: > uname -a > Linux linuxcnc 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Fri Jan 1 21:15:16 GMT > 2021 armv7l G

Re: [Emc-users] Stepper PID

I don't see the configs.. Did I miss something? On Wed, Feb 2, 2022 at 8:32 AM andy pugh wrote: > On Wed, 2 Feb 2022 at 14:22, Thaddeus Waldner wrote: > > > Here is a short video that illustrates the problem. > > https://youtu.be/DdYYpdC51Vs > > Admittedly I watched it with the sound off, but

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022 at 14:22, Thaddeus Waldner wrote: > Here is a short video that illustrates the problem. > https://youtu.be/DdYYpdC51Vs Admittedly I watched it with the sound off, but the P=100 looks "softer". Maybe try going back to P=1000 but drop the axis, joint and stepgen maxaccel down a

Re: [Emc-users] Stepper PID

 copy-paste from terminal: uname -a Linux linuxcnc 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Fri Jan 1 21:15:16 GMT 2021 armv7l GNU/Linux As I said, this is the sd card image straight from the LinuxCNC website. I wanted to ask, is that the best route to go? I’m not terribly impressed with the latency

Re: [Emc-users] Stepper PID

Could you post your configs? Could your hal functions be out of order? I run pid steppers with RPI and don't notice this. Sam On Wed, Feb 2, 2022, 3:01 AM andy pugh wrote: > On Wed, 2 Feb 2022 at 07:44, Thaddeus Waldner wrote: > > > 2) why is servo thread jitter even making into the stepper

Re: [Emc-users] 2.8 or 2.9?

On Wed, 2 Feb 2022 at 05:38, Andy Howell wrote: > I maintain a gantry style CNC router for our high school robotics team. > Tonight our hard disk died. I need to decide what version to install. > From reading the list, it looks like 2.9 is close to release. My > preference would be to go with t

Re: [Emc-users] Stepper PID

On Wed, 2 Feb 2022 at 07:44, Thaddeus Waldner wrote: > 2) why is servo thread jitter even making into the stepper pulse train with a > Mesa Ethernet card and no communication errors? Do I have anything > misconfigured? The idea of using a PID is that it compensates for the fact that the servo

Re: [Emc-users] 2.8 or 2.9?

On Wednesday, February 2, 2022 12:15:59 AM EST Andy Howell wrote: > Hello, > > I maintain a gantry style CNC router for our high school robotics > team. Tonight our hard disk died. I need to decide what version to > install. From reading the list, it looks like 2.9 is close to release. > My prefe

Re: [Emc-users] Stepper PID

On Wednesday, February 2, 2022 2:39:29 AM EST Thaddeus Waldner wrote: > Hi, > > I have a pi4 running the 2.8.2 iso. I have it connected to a Mesa 7i96 > and from there I’m driving small stepper motors with tmc2209 > “stepstick” drivers. I think my step rate at max speed is around 8khz > > I get a