[Emc-users] Running LinuxCnc without Mesa cards
Hi, I need to do a lot of changes to a customer's system that has 5i23 and other cards installed. I dont have a similar installation to work on so my question is, is there a way to run LinuxCnc or just start it up without functionality, without having the 5i23 installed. Something like a dummy component. I need to make sure all the HAL connections are made and are to the right pins. Once that is done I can take the files to their system and test. -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg Skype Me^(TM)! skype:marius_d.liebenberg?call Get Skype http://www.skype.com/go/download and call me for free. --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130301-1, 2013/03/01 Tested on: 2013/03/02 10:13:09 AM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] bldc/axis homing
I may be having a similar problem. I am using home to index on a ordinary rotary servo machine and the first time I try to home after starting Linuxcnc, one axis always seems to set a following a error, If I try to home it a second time it will home fine? I am not using bldc, so it might be possible that your following error on homing problem could be completely unrelated to bldc using index to initialize. What is more odd is that I only seem to have a problem with one axis (out of 4) doing it. I think Andy might be on the right track with thinking it may have something to do with the counts resetting to zero when the index is tripped for the first time. But the question still remains, what to do about it? - Original Message - Hello everybody, I would like to somehow Home the bldc linear motor using axis GUI home button. I am using bldc in qi mode, so it has to be homed using bldc.init (separate from axis GUI). But on the other side bldc and axis has to be homed simultaneously because of index-enable signal and latching of encoder value. So i have to somehow trick the axis. Any idea how could i do that? One of my idea was to use the axis.homing - bldc-init to start the bldc homing and at at the same time temporary change the axis.f-error-lim value (so that axis homing won't stop because of following error). But i could not find the axis.f-error-lim INPUT pin. Is there some other option to temporary change the f-error limit value? Is there any other option how to home the axis and bldc? Regards, Klemen -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Todd Zuercher mailto:zuerc...@embarqmail.com -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
Is the Count value going to zero during those glitches? Could you monitor ResetCounterValue also during your test? Could there be some mechanism that causes noise on ResetCounterValue only when you count down? -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Running LinuxCnc without Mesa cards
On Sat, Mar 2, 2013 at 10:13 AM, Marius Liebenberg mar...@mastercut.co.zawrote: Hi, I need to do a lot of changes to a customer's system that has 5i23 and other cards installed. I dont have a similar installation to work on so my question is, is there a way to run LinuxCnc or just start it up without functionality, without having the 5i23 installed. Something like a dummy component. I need to make sure all the HAL connections are made and are to the right pins. Once that is done I can take the files to their system and test. No, AFAIK. A build-option where the HAL driver could be built in a simulator mode would be nice. All the HAL-pins would be exposed and available for monitoring, but no real hardware would be required. AW -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Running LinuxCnc without Mesa cards
Am 02.03.2013 um 11:27 schrieb Anders Wallin: On Sat, Mar 2, 2013 at 10:13 AM, Marius Liebenberg mar...@mastercut.co.zawrote: Hi, I need to do a lot of changes to a customer's system that has 5i23 and other cards installed. I dont have a similar installation to work on so my question is, is there a way to run LinuxCnc or just start it up without functionality, without having the 5i23 installed. Something like a dummy component. I need to make sure all the HAL connections are made and are to the right pins. Once that is done I can take the files to their system and test. No, AFAIK. A build-option where the HAL driver could be built in a simulator mode would be nice. All the HAL-pins would be exposed and available for monitoring, but no real hardware would be required. just emulating the pins with say a Python userland HAL component would be easy that wouldnt help beyond loading though since the behaviour would have to be emulated too or it would be of rather limited use - the first dependency on an output pin having some non-default value would stop the simulation in its tracks That problem has a $153 solution - which you'd want to put into proportion to the cost of writing a simulator including behavior -m AW -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Running LinuxCnc without Mesa cards
Hi Micheal, I hear you. The problem is that I have to keep a machine just for that hardware. Also it has more than one 5i23. I suppose I will have to do that anyway. The 5i23's will end up being used somewhere so it all starts again :) On 2013/03/02 12:41 PM, Michael Haberler wrote: Am 02.03.2013 um 11:27 schrieb Anders Wallin: On Sat, Mar 2, 2013 at 10:13 AM, Marius Liebenberg mar...@mastercut.co.zawrote: Hi, I need to do a lot of changes to a customer's system that has 5i23 and other cards installed. I dont have a similar installation to work on so my question is, is there a way to run LinuxCnc or just start it up without functionality, without having the 5i23 installed. Something like a dummy component. I need to make sure all the HAL connections are made and are to the right pins. Once that is done I can take the files to their system and test. No, AFAIK. A build-option where the HAL driver could be built in a simulator mode would be nice. All the HAL-pins would be exposed and available for monitoring, but no real hardware would be required. just emulating the pins with say a Python userland HAL component would be easy that wouldnt help beyond loading though since the behaviour would have to be emulated too or it would be of rather limited use - the first dependency on an output pin having some non-default value would stop the simulation in its tracks That problem has a $153 solution - which you'd want to put into proportion to the cost of writing a simulator including behavior -m AW -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg Skype Me^(TM)! skype:marius_d.liebenberg?call Get Skype http://www.skype.com/go/download and call me for free. --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130302-0, 2013/03/02 Tested on: 2013/03/02 01:50:54 PM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
No, the count value at glitch is changing, at list last bits, it has value: BIN 0011 . It seems the counter is not reset, because after the glitch the value does not jump to 0 and stays there, but continues to gradually fall/rise from value before the glitch. Regards, Klemen From: Anders Wallin anders.e.e.wal...@gmail.com To: Klemen Dovrtel klemen_dovr...@yahoo.com; Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 11:25 AM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour Is the Count value going to zero during those glitches? Could you monitor ResetCounterValue also during your test? Could there be some mechanism that causes noise on ResetCounterValue only when you count down? -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
You get illegal noise states from your hardware, causing illegal transitions in your logic. For a solution look at page 13 of this document: http://www.avagotech.com/docs/AV02-0096EN j. On Sat, Mar 2, 2013 at 9:23 AM, Klemen Dovrtel klemen_dovr...@yahoo.comwrote: Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). I increase the servo-thread period, but the result was the same. I also tried to locate a certain position of axis when the data is bad, and i could not do this - it seems this is happening randomly. Does anybody have some idea where to look for the error? Regards, Klemen -- library IEEE; use IEEE.STD_LOGIC_1164.ALL; --use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_SIGNED.ALL; -- Uncomment the following library declaration if using -- arithmetic functions with Signed or Unsigned values --use IEEE.NUMERIC_STD.ALL; -- Uncomment the following library declaration if instantiating -- any Xilinx primitives in this code. --library UNISIM; --use UNISIM.VComponents.all; entity QuadCounter is Port ( clk : in std_logic;--system clock QuadA : in std_logic;--first input from quadrature device (i.e. optical disk encoder) QuadB : in std_logic;--second input from quadrature device (i.e. optical disk encoder) CounterValue : out std_logic_vector(31 downto 0); ResetCounterValue : in std_logic ); end QuadCounter; architecture Behavioral of QuadCounter is signal Counter : std_logic_vector(31 downto 0) := (others = '0') ; -- previos quad signal signal QuadAprevious : std_logic := '0'; signal QuadBprevious : std_logic := '0'; signal state : std_logic_vector(3 downto 0) := ; -- ??initial state, MUST be set, or FF/Latch state_1 (without init value) has a constant value of 0 in block QuadDecoder. This FF/Latch will be trimmed during the optimization process. -- state deffinitons constant Wait0 : std_logic_vector(3 downto 0) := ; constant CountUp0 : std_logic_vector(3 downto 0):= 0001; constant CountDown0 : std_logic_vector(3 downto 0) := 0010; constant Wait1 : std_logic_vector(3 downto 0) := 0101; constant CountUp1 : std_logic_vector(3 downto 0):= 0111; constant CountDown1 : std_logic_vector(3 downto 0) := 0100; constant Wait2 : std_logic_vector(3 downto 0) := 1010; constant CountUp2 : std_logic_vector(3 downto 0):= 1000; constant CountDown2 : std_logic_vector(3 downto 0) := 1011; constant Wait3 : std_logic_vector(3 downto 0) := ; constant CountUp3 : std_logic_vector(3 downto 0):= 1110; constant CountDown3 : std_logic_vector(3 downto 0) := 1101; begin process(clk) begin if rising_edge(clk) then state = QuadAprevious QuadBprevious QuadA QuadB; case state is when Wait0|Wait1|Wait2|Wait3 = -- do nothing when CountUp0|CountUp1|CountUp2|CountUp3 = Counter = Counter + 1; when CountDown0|CountDown1|CountDown2|CountDown3 = Counter = Counter - 1; when others = -- ERROR end case; --state if (ResetCounterValue = '1') then Counter = (others = '0'); end if; CounterValue = Counter; QuadAprevious = QuadA; QuadBprevious = QuadB; end if; end process; --(clk) end Behavioral; -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb
[Emc-users] Shizuoka Four Axis on eBay
Hey, I've just seen an idea on that machine, if it is what I think it is I been pondering for a long time on what to do about a sloppy quill in order to CNC it, and it looks like it might have been done on this machine. Instead of trying to snug up the quill, mill/grind the front of the machine to be parallel with the quill. Now you can mount linear slides and a plate that grabs the quill at the bottom! Regards Roland On 2 March 2013 01:10, Kirk Wallace kwall...@wallacecompany.com wrote: http://www.ebay.com/itm/251235604390 Also here too: http://sacramento.craigslist.org/tls/3640202006.html I already have one and there is no space left, shucks. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Shizuoka Four Axis on eBay
On 2 March 2013 15:10, Roland Jollivet roland.jolli...@gmail.com wrote: Instead of trying to snug up the quill, mill/grind the front of the machine to be parallel with the quill. Now you can mount linear slides and a plate that grabs the quill at the bottom! I think what you are seeing is just the way that the CNC feed has been coupled to the quill. However, that doesn't mean that your idea isn't a good one. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] bldc/axis homing
On Fri, 1 Mar 2013, Todd Zuercher wrote: Date: Fri, 1 Mar 2013 07:52:22 -0500 (EST) From: Todd Zuercher zuerc...@embarqmail.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Klemen Dovrtel klemen_dovr...@yahoo.com, Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] bldc/axis homing I may be having a similar problem. I am using home to index on a ordinary rotary servo machine and the first time I try to home after starting Linuxcnc, one axis always seems to set a following a error, If I try to home it a second time it will home fine? I am not using bldc, so it might be possible that your following error on homing problem could be completely unrelated to bldc using index to initialize. What is more odd is that I only seem to have a problem with one axis (out of 4) doing it. I think Andy might be on the right track with thinking it may have something to do with the counts resetting to zero when the index is tripped for the first time. But the question still remains, what to do about it? If you have reasonably late LinuxCNC version, the PID component has an input for index-enable which works arond the thump on index problem, heres the manual page info about this pin: pid.N.index-enable bit in On the falling edge of index-enable, pid does not update the internal command derivative estimate. On systems which use the encoder index pulse, this pin should be connected to the index- enable signal. When this is not done, and FF1 is nonzero, a step change in the input command causes a single-cycle spike in the PID output. On systems which use exactly one of the -deriv inputs, this affects the D term as well. Todd Zuercher mailto:zuerc...@embarqmail.com Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
On Fri, 1 Mar 2013, Klemen Dovrtel wrote: Date: Fri, 1 Mar 2013 23:23:48 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] fpga epp data transfer - strange behaviour Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). I increase the servo-thread period, but the result was the same. I also tried to locate a certain position of axis when the data is bad, and i could not do this - it seems this is happening randomly. Does anybody have some idea where to look for the error? Regards, Klemen My first guess is that you are not sampling the 32 bit count atomically, That is, with the EPP transfers you are reading the count as 4 individual bytes so you must latch all 32 bits of the count at the beginning of the 4 byte transfer so that you dont have scrambled data in your 32 bit count if the count happens to change when reading. Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Shizuoka Four Axis on eBay
On Sat, 2013-03-02 at 15:36 +, andy pugh wrote: On 2 March 2013 15:10, Roland Jollivet roland.jolli...@gmail.com wrote: Instead of trying to snug up the quill, mill/grind the front of the machine to be parallel with the quill. Now you can mount linear slides and a plate that grabs the quill at the bottom! I think what you are seeing is just the way that the CNC feed has been coupled to the quill. However, that doesn't mean that your idea isn't a good one. My Shizuoka, and I suspect the mill on eBay, are just like a Bridgeport. The quill has a post that travels in a slot in the front of the housing. A ball screw drives the post. I've seen Bridgeport conversions that drive the post, and others that have a clamp added to the bottom of the quill. It's hard to find a place on the Bridgeport to mount the motor and belt and still have access to the head adjustments. This is another example of how converting an existing CNC machine is much easier and cheaper than converting a manual machine. For my Bridgeport and Cincinnati mill, I am hoping to make a new head that replaces the quill with a rigid spindle which mounts to a dovetail slide between the spindle and ram. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
I think this can not be the reason, this would not trigger glitches only while decreasing the encoder value. My epp data transfer is started with address write which triggers the sampling and latching of encoder position value and all other signals values. The following data read/write are then dealing only with latched values which can not change during the data transfer. Redards, Klemen From: Peter C. Wallace p...@mesanet.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 4:45 PM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour On Fri, 1 Mar 2013, Klemen Dovrtel wrote: Date: Fri, 1 Mar 2013 23:23:48 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] fpga epp data transfer - strange behaviour Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). I increase the servo-thread period, but the result was the same. I also tried to locate a certain position of axis when the data is bad, and i could not do this - it seems this is happening randomly. Does anybody have some idea where to look for the error? Regards, Klemen My first guess is that you are not sampling the 32 bit count atomically, That is, with the EPP transfers you are reading the count as 4 individual bytes so you must latch all 32 bits of the count at the beginning of the 4 byte transfer so that you dont have scrambled data in your 32 bit count if the count happens to change when reading. Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
On Sat, 2 Mar 2013, Klemen Dovrtel wrote: Date: Sat, 2 Mar 2013 09:38:34 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour I think this can not be the reason, this would not trigger glitches only while decreasing the encoder value. My epp data transfer is started with address write which triggers the sampling and latching of encoder position value and all other signals values. The following data read/write are then dealing only with latched values which can not change during the data transfer. Redards, Klemen OK thats good There is also a mistake in the counter logic related to sampling external asynchronous signals (QuadA and QuadB) in multiple places (this will cause occasional wrong states when an input is changing whan sampled) But if you have big transient errors, I would look at the EPP interface. In our EPP interface we required digital filters on control signals as the signals from the parallel port (especially with a long cable) are quite slow and dirty relative to the FPGAs clock speeds. From: Peter C. Wallace p...@mesanet.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 4:45 PM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour On Fri, 1 Mar 2013, Klemen Dovrtel wrote: Date: Fri, 1 Mar 2013 23:23:48 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] fpga epp data transfer - strange behaviour Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). I increase the servo-thread period, but the result was the same. I also tried to locate a certain position of axis when the data is bad, and i could not do this - it seems this is happening randomly. Does anybody have some idea where to look for the error? Regards, Klemen My first guess is that you are not sampling the 32 bit count atomically, That is, with the EPP transfers you are reading the count as 4 individual bytes so you must latch all 32 bits of the count at the beginning of the 4 byte transfer so that you dont have scrambled data in your 32 bit count if the count happens to change when reading. Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
Klemen Dovrtel wrote: Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). Maybe you should read out the individual bytes of the position report and put them in a file. One possibility is that you are not freezing a valid n-byte count before reading out the individual bytes of the count over the EPP port. The Pico Systems boards, and I'll bet the Mesa boards, too, have a holding register that freezes all 24-bit position counts for all axes before reading them a byte at a time. I don't see such a holding register in your VHDL. That's just one guess as to the cause. Jon -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
I see, if i understand this correctly, i should add a two-stage synchronizer to latch the data from QuadA/B before sampling with counter logic? Ok, thank you for the suggestions, i will try to add some filters, as suggested also by Jan de Kruyf. Regards, Klemen From: Peter C. Wallace p...@mesanet.com To: Klemen Dovrtel klemen_dovr...@yahoo.com; Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 7:14 PM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour On Sat, 2 Mar 2013, Klemen Dovrtel wrote: Date: Sat, 2 Mar 2013 09:38:34 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour I think this can not be the reason, this would not trigger glitches only while decreasing the encoder value. My epp data transfer is started with address write which triggers the sampling and latching of encoder position value and all other signals values. The following data read/write are then dealing only with latched values which can not change during the data transfer. Redards, Klemen OK thats good There is also a mistake in the counter logic related to sampling external asynchronous signals (QuadA and QuadB) in multiple places (this will cause occasional wrong states when an input is changing whan sampled) But if you have big transient errors, I would look at the EPP interface. In our EPP interface we required digital filters on control signals as the signals from the parallel port (especially with a long cable) are quite slow and dirty relative to the FPGAs clock speeds. From: Peter C. Wallace p...@mesanet.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 4:45 PM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour On Fri, 1 Mar 2013, Klemen Dovrtel wrote: Date: Fri, 1 Mar 2013 23:23:48 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] fpga epp data transfer - strange behaviour Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). I increase the servo-thread period, but the result was the same. I also tried to locate a certain position of axis when the data is bad, and i could not do this - it seems this is happening randomly. Does anybody have some idea where to look for the error? Regards, Klemen My first guess is that you are not sampling the 32 bit count atomically, That is, with the EPP transfers you are reading the count as 4 individual bytes so you must latch all 32 bits of the count at the beginning of the 4 byte transfer so that you dont have scrambled data in your 32 bit count if the count happens to change when reading. Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___
[Emc-users] Need PC and Mesa card recommendations
I have a Bridgeport with Anilam Crusader II control, control is acting dead so it's time for an LinuxCNC upgrade. I did a Anilam lathe to EMC2 conversion a few years back so I'm somewhat familiar with what needs to be done. My lathe conversion used the Mesa 5i20 board, I think that's all that was available at the time. For the mill, I want the existing 3 axis plus VFD speed control, possibly a future spindle encoder for rigid tapping. I would also like the possibility of adding a 4th or even 5th axis in the future. What Mesa boards would work for this? What PC or motherboard would work best with LinuxCNC plus the Mesa boards? Thanks! Roger Neal -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] fpga epp data transfer - strange behaviour
It is quite correct to latch the data, before reading out in byte chunks, so no roll over occurs in the hi byte going from 00FF to 0100 for instance, if there is a count pulse during reading . I forgot about that part. j. On Sat, Mar 2, 2013 at 8:57 PM, Klemen Dovrtel klemen_dovr...@yahoo.comwrote: I see, if i understand this correctly, i should add a two-stage synchronizer to latch the data from QuadA/B before sampling with counter logic? Ok, thank you for the suggestions, i will try to add some filters, as suggested also by Jan de Kruyf. Regards, Klemen From: Peter C. Wallace p...@mesanet.com To: Klemen Dovrtel klemen_dovr...@yahoo.com; Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 7:14 PM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour On Sat, 2 Mar 2013, Klemen Dovrtel wrote: Date: Sat, 2 Mar 2013 09:38:34 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour I think this can not be the reason, this would not trigger glitches only while decreasing the encoder value. My epp data transfer is started with address write which triggers the sampling and latching of encoder position value and all other signals values. The following data read/write are then dealing only with latched values which can not change during the data transfer. Redards, Klemen OK thats good There is also a mistake in the counter logic related to sampling external asynchronous signals (QuadA and QuadB) in multiple places (this will cause occasional wrong states when an input is changing whan sampled) But if you have big transient errors, I would look at the EPP interface. In our EPP interface we required digital filters on control signals as the signals from the parallel port (especially with a long cable) are quite slow and dirty relative to the FPGAs clock speeds. From: Peter C. Wallace p...@mesanet.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, March 2, 2013 4:45 PM Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour On Fri, 1 Mar 2013, Klemen Dovrtel wrote: Date: Fri, 1 Mar 2013 23:23:48 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] fpga epp data transfer - strange behaviour Hello everybody, I am using fpga to monitor the incremental encoder and transfer the axis absolute position to pc using parallel port and epp communication. When I run the Axis GUI I am getting some strange following errors. I found out that occasionally i get some bad axis position data transfer from the fpga. But what is very strange that this happens only when the axis moves in negative direction and never when it moves positive direction or stays still (please see the image attached)). So i thought there must be some bug in pfga encoder, not in epp communication, but i have no idea what could possibly be wrong - the code is very simple (i pasted it below). I increase the servo-thread period, but the result was the same. I also tried to locate a certain position of axis when the data is bad, and i could not do this - it seems this is happening randomly. Does anybody have some idea where to look for the error? Regards, Klemen My first guess is that you are not sampling the 32 bit count atomically, That is, with the EPP transfers you are reading the count as 4 individual bytes so you must latch all 32 bits of the count at the beginning of the 4 byte transfer so that you dont have scrambled data in your 32 bit count if the count happens to change when reading. Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Peter Wallace Mesa
Re: [Emc-users] fpga epp data transfer - strange behaviour
On Sat, 2 Mar 2013, Klemen Dovrtel wrote: Date: Sat, 2 Mar 2013 10:57:52 -0800 (PST) From: Klemen Dovrtel klemen_dovr...@yahoo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] fpga epp data transfer - strange behaviour I see, if i understand this correctly, i should add a two-stage synchronizer to latch the data from QuadA/B before sampling with counter logic? Yes or a digital filter (or at least fix the double sampling of asynchronous data even though the synthesizer _may_ optimize it away) Ok, thank you for the suggestions, i will try to add some filters, as suggested also by Jan de Kruyf. Regards, Klemen Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Shizuoka Four Axis on eBay
Does yours have the tool changer? On 3/1/13 3:10 PM, Kirk Wallace wrote: http://www.ebay.com/itm/251235604390 Also here too: http://sacramento.craigslist.org/tls/3640202006.html I already have one and there is no space left, shucks. -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] GladeVCP Persistence On_Destroy sensitivity
Anybody using GladeVCP with Persistence? Did you have trouble getting it to save settings? It seems to me as though it is very sensitive to what widget the 'on_destroy' signal is attached. The documentation does warn against attaching it to the 'window1' object. But I had terrible luck getting it to save_state when LinuxCNC was shutting down. I was able to figure out what it was trying to do by putting print statements into /usr/lib/pymodules/python2.6/gladevcp/persistence.py What I found was that the getter() returned by get_value() would fail when the window was being destroyed. I resolved the problem by putting the 'on_destroy' signal on the same widget that was being read first. There is no way to determine which widget will be first, other than by putting in print statements. Has anyone else seen this behavior? -Kip -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Shizuoka Four Axis on eBay
On Sat, 2013-03-02 at 15:29 -0800, Drew Rogge wrote: Does yours have the tool changer? Yup, http://www.wallacecompany.com/machine_shop/Shizuoka/00030-1a.jpg http://www.wallacecompany.com/machine_shop/Shizuoka/ -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] GladeVCP Persistence On_Destroy sensitivity
Am 03.03.2013 um 03:46 schrieb Kip Shaffer: Anybody using GladeVCP with Persistence? Did you have trouble getting it to save settings? It seems to me as though it is very sensitive to what widget the 'on_destroy' signal is attached. The documentation does warn against attaching it to the 'window1' object. But I had terrible luck getting it to save_state when LinuxCNC was shutting down. me too, and I wrote that code ;) unfortunately there is more than one way to shut down a gladevcp application: - you can kill the window which will get you a destroy event - the linuxcnc script however sends a signal to all running parties to catch the second scenario, see http://www.linuxcnc.org/docs/devel/html/gui/gladevcp.html#_saving_state_when_ctrl_c_is_pressed I was able to figure out what it was trying to do by putting print statements into /usr/lib/pymodules/python2.6/gladevcp/persistence.py What I found was that the getter() returned by get_value() would fail when the window was being destroyed. yes, it's a chicken-and-egg problem - persistence.py cant do anything anymore if it is called too late in the shutdown process (eg if the widgets are already destroyed there's no way to retrieve their state anymore) let me know how it goes - Michael I resolved the problem by putting the 'on_destroy' signal on the same widget that was being read first. There is no way to determine which widget will be first, other than by putting in print statements. Has anyone else seen this behavior? -Kip -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] GladeVCP Persistence On_Destroy sensitivity
following up to myself: The issue goes down a bit deeper, and it's about the notion of controlled shutdown This is a dark corner of LinuxCNC, especially with respect to time-to-estop for connected hardware, and it warrants some thought and work. Unfortunately I dont have a quick answer for you, but let me sketch it out: - either HAL or RTAPI's session concept needs to be firmed up, this is a very loosely defined area as of now - what is lacking is a defined sequence of operations which happens at shutdown (for whatever reason that would be); that needs to work reliably regardless of the underlying RT infrastructure (read: _lots_ of testing, and automated please; very likely external hardware is needed to verify results) I have looked into the issue in the past, more with an eye towards fast estop, and the gist was: if it is too work fast, the shutdown sequence must be aware of the hardware it is using; for instance, the fastest, lowest-impact method to shutdown a Mesa card was to remove the watchdog function from the thread which got the time windows down to a watchdog period. So shutdown is fast or portable, tick either one. It is not an issue which can be solved en passant with a quick fix; it needs a bit of a plan and some systematic work which doesnt immediately yield results. I know this doesnt yet help you at the application level yet and part of the issue with gladevcp and signals is that it is, well, a signal, which always has been a touchy vehicle for critical sequences. In case the on_unix_signal method turns out to be insufficiently reliable, what could help in the gladevcp case is to adapt signal handling like so: - use a signal file descriptor (signalfd) - watch the signal file descriptor in the gladevcp main loop and associate an event handler with it - this will deliver a signal in-line with other gtk events to the Python code, and in a controlled order, hopefully making it more reliable I know the above is technobabble - in the faint hope somebody other than me picks up the work It is needed though I think - gladevcp use is mutating from a widget add-on to a primary UI vehicle. - Michael Am 03.03.2013 um 08:06 schrieb Michael Haberler: Am 03.03.2013 um 03:46 schrieb Kip Shaffer: Anybody using GladeVCP with Persistence? Did you have trouble getting it to save settings? -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
