Re: [Emc-users] On the status of BLDC component and Hostmot2
On Thu, 18 Aug 2011, andy pugh wrote:
> Date: Thu, 18 Aug 2011 23:09:55 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] On the status of BLDC component and Hostmot2
>
> On 18 August 2011 20:27, John Prentice wrote:
>
>> I suspect there could be a coding problem in 3pwmgen. The documentation and
>> the loaded component have "fault" as an output pin. All the description of
>> it suggests it should be an input (e.g. it disables the generator, the
>> invert pin alters it being active high/low etc.)
>
> It's been a while since I looked, but I think it was correct. There is
> a physical pin that the 7i39 uses to indicate that it has faulted, and
> a HAL pin to echo that status, IIRC. The physical pin is an input to
> the FPGA 3pwmgen, the "fault" HAL bit is an output.
The 7I39 doesnt use the pin but its fed through one of the sense pins I
believe.
The external fault input is for things like IGBT modules that have a
overcurrent/overtemp fault output pin. Its a latched input (with a ~100 ns
glitch filter) that turns off all PWM outputs and requires the host (EMC in
this case) to react to the fault HAL pin and re-enable the outputs
Peter Wallace
Mesa Electronics
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Re: [Emc-users] On the status of BLDC component and Hostmot2
On 18 August 2011 20:27, John Prentice wrote: > I suspect there could be a coding problem in 3pwmgen. The documentation and > the loaded component have "fault" as an output pin. All the description of > it suggests it should be an input (e.g. it disables the generator, the > invert pin alters it being active high/low etc.) It's been a while since I looked, but I think it was correct. There is a physical pin that the 7i39 uses to indicate that it has faulted, and a HAL pin to echo that status, IIRC. The physical pin is an input to the FPGA 3pwmgen, the "fault" HAL bit is an output. > Finally, just a clarification; I presume one nets the 5i20 GPIO pins defined > in the 7i39 manual to the "hall" inputs of the bldc component. Yes, indeed. They are just input pins, so don't get given a special status by the driver. (In fact, you could use them for something else if you had a different form of motor feedback, and simply use the 7i39 for signal conditioning) -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
Andy, greetings > >> Andy: What is the best place to find the mapping between the >> configuration >> tags for bldc and the personality word > > Ignore "personality", it's a side effect of the way that comp works > and the auto-generated documentation. > Thanks - that is fine - I wanted to make sure I did not miss "netting" any important pins. I suspect there could be a coding problem in 3pwmgen. The documentation and the loaded component have "fault" as an output pin. All the description of it suggests it should be an input (e.g. it disables the generator, the invert pin alters it being active high/low etc.) I will leave it unconnected for now - yes I nearly have actual wiring into the 7i39 :=) Finally, just a clarification; I presume one nets the 5i20 GPIO pins defined in the 7i39 manual to the "hall" inputs of the bldc component. TIA John Prentice -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
On 18 August 2011 11:43, John Prentice wrote: > Andy: What is the best place to find the mapping between the configuration > tags for bldc and the personality word Ignore "personality", it's a side effect of the way that comp works and the auto-generated documentation. You will get the pins you need for the input and output modes you specify. -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
Andy, Peter W- greetings Thank you for info on the firmware naming. Andy: What is the best place to find the mapping between the configuration tags for bldc and the personality word whose bits are used in the pin definitions to define the existence of some pins? Best wishes John Prentice -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
On Tue, 16 Aug 2011, John Prentice wrote:
> Date: Tue, 16 Aug 2011 21:16:48 +0100
> From: John Prentice
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] On the status of BLDC component and Hostmot2
>
> Andy, greetings
>
>>
>> There is an SVTP7_7i39 bitfile which I believe should arrive with a
>> apt-get install emc2-firmware (and which you might already have)
>> The current release (2.4.6) has the bldc_hall3 component, but doesn't
>> seem to have the three-phase PWM Hostmot2 function so you will need
>> 2.5 to use the 7i39.
>
> I have installed the emc2-firmware package and in the 5i20 folder the
> changelog for firmware release 0.8 says there is a 5i20/SVTP_7I39.PIN The
> actual file installed is SVTP6_7I39.PIN. The changelog says there is a
> ti23/SVTP6_7I39.PIN. I take it that ti23 is a typo for 5i23.
>
> Now for some wild guessing on naming. SV starts ever name, TP = three phase,
> 6 is a version number and 7i39 is the daughter board expected.
SV means servo, TP means ThreePhase, 6 is the number of servo channels (3x
7I39) 7I39 means pinout matches 7I39
>
> If 6 is the version then it sounds as though the released firmware is behind
> the version (SVTP7_7i39) to which you refer. Release was December 19 2010 by
> Jeff Epler.
>
> I have not yet found where the actual bit files (and VHDL stuff) are stored.
>
> Any advice/help welcomed - I have so many unknowns that I at least want to
> start with the latest versions of everything.
>
> Thanks
>
> John Prentice
>
>
> --
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Peter Wallace
Mesa Electronics
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Re: [Emc-users] On the status of BLDC component and Hostmot2
On 16 August 2011 21:16, John Prentice wrote: > Now for some wild guessing on naming. SV starts ever name, TP = three phase, > 6 is a version number and 7i39 is the daughter board expected. Not quite. (but partly my fault) SV = Servo, TP = Three Phase, 6 = Supports 6 servos. > > If 6 is the version then it sounds as though the released firmware is behind > the version (SVTP7_7i39) to which you refer. No, sorry, that was a typo. I meant SVTP6. The one you have is, as far as I know, the latest version. > I have not yet found where the actual bit files (and VHDL stuff) are stored. The bit files should be in /lib/firmware/hm2 -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
Andy, greetings > > There is an SVTP7_7i39 bitfile which I believe should arrive with a > apt-get install emc2-firmware (and which you might already have) > The current release (2.4.6) has the bldc_hall3 component, but doesn't > seem to have the three-phase PWM Hostmot2 function so you will need > 2.5 to use the 7i39. I have installed the emc2-firmware package and in the 5i20 folder the changelog for firmware release 0.8 says there is a 5i20/SVTP_7I39.PIN The actual file installed is SVTP6_7I39.PIN. The changelog says there is a ti23/SVTP6_7I39.PIN. I take it that ti23 is a typo for 5i23. Now for some wild guessing on naming. SV starts ever name, TP = three phase, 6 is a version number and 7i39 is the daughter board expected. If 6 is the version then it sounds as though the released firmware is behind the version (SVTP7_7i39) to which you refer. Release was December 19 2010 by Jeff Epler. I have not yet found where the actual bit files (and VHDL stuff) are stored. Any advice/help welcomed - I have so many unknowns that I at least want to start with the latest versions of everything. Thanks John Prentice -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
On 15 August 2011 12:23, John Prentice wrote: > Finally a really dumb question. The 7i39 has SENSE A0/A1 and SENSE B0/B1 > outputs to FPGA board and these signals are on Pins 4/5 of the encoder > interfaces. What are they for? I think that is a question for PCW. I don't think that the Hostmot2 firmware does anything with them. -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
> Rather than download/compile, you can install the precompiled package > from the buildbot, which is probably easier: > http://buildbot.linuxcnc.org/ > > Do you have Hall sensors on the motors? > Andy, greetings Thanks for the suggestion of Buildbot. The motors do have Hall sensors. I thought that I would start "gently" with trapezoidal drive, then close the position loop with the encoders and finally see what happens to performance using sinusoidal. The encoder resolution is so high (effectively 25,000 counts per rev) that it seems there could be lots of traps. The XY stage is obviously from some semiconductor fab. line, made by Newport, very stiff mechanically. It must have been servo controlled originally though I have no original electronics. Finally a really dumb question. The 7i39 has SENSE A0/A1 and SENSE B0/B1 outputs to FPGA board and these signals are on Pins 4/5 of the encoder interfaces. What are they for? Best wishes John Prentice -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] On the status of BLDC component and Hostmot2
On 15 August 2011 11:07, John Prentice wrote: > If I pull 2.5-pre and compile it should I have everything needed (including > a bitfile for Mesa 5i20)? There is an SVTP7_7i39 bitfile which I believe should arrive with a apt-get install emc2-firmware (and which you might already have) The current release (2.4.6) has the bldc_hall3 component, but doesn't seem to have the three-phase PWM Hostmot2 function so you will need 2.5 to use the 7i39. Rather than download/compile, you can install the precompiled package from the buildbot, which is probably easier: http://buildbot.linuxcnc.org/ Do you have Hall sensors on the motors? If you don't have encoders or Hall sensors on the motors, but only linear scales, then it is probably still possible to run the stage as the relationship between stage position and motor rotor angle is fixed. You will need to run the magnetic alignment routine in "bldc" (loadrt bldc cfg=q ) and have the encoder scale set to the number of linear scale counts per motor physical rev, with the correct motor pole count parameter set in "bldc" -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] On the status of BLDC component and Hostmot2
Greetings I have an XY stage with Heidenhain linear encoders and BLDC motors on its screws. The encoders have built in interpolation giving a 0.08 micrometre resolution. I have a Mesa 7i39 on its way. There was a lot of BLDC work done by Andy Pugh around the turn of the year but so far as I can see everything is now very quiet. If I pull 2.5-pre and compile it should I have everything needed (including a bitfile for Mesa 5i20)? The motors are Elcom/Pittman Nema 23 frame (5111D008) - So far Google has not helped much! I plan to test initially with a rotary encoder as runaway on the XY table would be nasty. Does anyone have any additional advice? John Prentice -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
