#linuxcnc-devel | Logs for 2015-03-06

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[00:26:56] <zeeshan> skunkworks: what kind of taper is that?!
[00:26:59] <zeeshan> on your tool holders
[00:27:22] <skunkworks> no taper. stait shank K&T own design from the 60's
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[00:28:26] <zeeshan> he does it clamp it down?
[00:28:29] <zeeshan> *how
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[00:37:38] <skunkworks> the spindle has a huge collet in it that clamps the tool
[00:37:47] <zeeshan> ah
[00:37:52] <skunkworks> kinda like a huge tormach tooling system
[00:37:58] <zeeshan> does your table
[00:38:10] <zeeshan> reach say tangentially to a 1/2" end mill?
[00:38:17] <zeeshan> for some reason my machine in horizontal mode
[00:38:20] <zeeshan> is 3" away from the table
[00:38:27] <zeeshan> its like they expect me to use a massive spacer plate to hold stuff
[00:39:39] <skunkworks> the spindle / tool will reach the center of the table
[00:39:46] <zeeshan> ah
[00:39:54] <zeeshan> i love that machine
[00:39:57] <zeeshan> its monsterous.
[00:40:01] <skunkworks> we do too.. :)
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[12:50:49] <skunkworks> oh well.
[12:50:50] <skunkworks> http://www.practicalmachinist.com/vb/deckel-maho-aciera-abene-mills/deckel-nc-upgrade-cons-pros-299846/index8.html#post2503889
[12:51:14] <skunkworks> cradek inserts xkcd comic about arguing on the internet.
[12:58:50] <skunkworks> wasn't there newer block diagrams of linuxcnc
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[14:18:53] <cradek> https://xkcd.com/386/
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[14:20:09] <skunkworks> Thank you :)
[14:26:05] <seb_kuzminsky> skunkworks: that's the diagram i know of
[14:26:56] <seb_kuzminsky> i have a branch where i started to modernize it but never finished, it's called 2.5-architecture-docs
[14:27:10] <seb_kuzminsky> and it makes me embarrassed every time i see it
[14:30:01] * skunkworks laughs and points
[14:32:41] <seb_kuzminsky> heh
[14:32:50] <seb_kuzminsky> too many projects, too little see-through
[14:34:26] <skunkworks> https://groups.yahoo.com/neo/groups/mach1mach2cnc/conversations/messages/146900
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[15:02:16] <cradek> heh where he says yaskawa I bet he means emc
[15:02:41] <cradek> I wonder what the actual bug was (with small moves) and whether we still have something like it
[15:03:55] <skunkworks> Ours says it will gouge.. I think mach just does it.
[15:04:19] <cradek> ah an undetected error condition
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[15:05:32] <skunkworks> I think this was one of the questions..
[15:05:33] <skunkworks> http://electronicsam.com/images/KandT/testing/Screenshot%20from%202014-09-30%2014:51:39.png
[15:05:55] <skunkworks> if the cutter gets too big - the vertical line gets consumed.
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[15:08:38] <cradek> skunkworks: yeah then you need a much fancier algorithm OR an error message
[15:08:49] <cradek> skunkworks: if they have neither, :-(
[15:12:21] <skunkworks> right
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[15:25:00] <skunkworks> http://www.practicalmachinist.com/vb/deckel-maho-aciera-abene-mills/deckel-nc-upgrade-cons-pros-299846/index8.html#post2504005
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[15:33:28] <cradek> skunkworks: sounds like you have to be a programmer to use it
[15:33:39] <skunkworks> I know - right..
[15:34:33] <skunkworks> Kflop seems to be neat solution - but the people that complain that you have to be a programmer to use linuxcnc seem to think kflops programming isn't programming...
[15:36:24] <ssi> fact of the matter is you have to be a machine integrator to use any reasonably complete machine integration tools
[15:36:32] <archivist> it is very hard to convince someone that their preconceived ideas are not right
[15:36:37] <ssi> and being a machine integrator means being a programmer, an EE, a control theorist, etc
[15:36:52] <archivist> an all rounder :)
[15:37:10] <ssi> yes... that's why I enjoy it so much
[15:37:45] <archivist> reminds me of Number 5 and mooore information....
[15:42:03] <archivist> just getting some machine manuals this week meant I could see some more spindle and head drawings
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[22:39:19] <mozmck> PCW: you around?
[22:39:47] <PCW> Yeah
[22:41:07] <mozmck> If I remove a stepgen from some pins in PinDesc, do I need to change the number of stepgens in the ModuleID above?
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[22:48:05] <PCW> yes
[22:48:35] <mozmck> ok. I figured out I needed the C-step pin for general IO
[22:49:51] <PCW> Ahh yeah if you need a higher numbered one for a chargepump you cant disable intermediated ones
[22:50:04] <PCW> intermediate
[22:50:09] <mozmck> ohh... ok then I'll adjust the numbers.
[22:50:40] <mozmck> I have a platform USB cable now - in case I really mess it up :)
[22:51:18] <PCW> all special functions can be used as GPIO but the special functiona can only be enabled on a 0 through N basis
[22:51:27] <mozmck> ok, makes sense.
[22:51:43] <PCW> (thats a driver limitation for command line simplicity)
[22:52:20] <PCW> the hardware can do it on a pin by pin basis but rather awkward to specify
[22:52:54] <PCW> normally you cant mess things up with pin files
[22:53:04] <mozmck> heh!
[22:53:28] <mozmck> So I see the chargepump just has a step pin and no dir - I guess that's fine
[22:53:50] <PCW> usual first time fatalities are not having the right ucf file (or no ucf file) associated with the top level file
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[22:54:47] <mozmck> I have the 7i92.ucf listed under TopEthernetHostMot2, so I think I'm fine there.
[22:54:50] <PCW> yeah you can just use the pins you need from a module
[22:55:15] <PCW> (unused inputs are logically terminated at 0)
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[22:56:54] <PCW> (so for example if you make a QA only quadrature counter, you can still use it in the up/down mode but QB will be tied to 0 internally so it will only count down)
[22:58:23] <mozmck> ise spits out plenty of warnings...
[23:00:39] <mozmck> If I need or want to program with JTAG do I use the same bit file?
[23:02:05] <PCW> Yes
[23:02:18] <mozmck> ok
[23:03:15] <PCW> if you want the fallback to work you have to set the bitfile options mentioned in the manual
[23:03:44] <mozmck> manual...
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[23:04:17] <mozmck> looking now
[23:06:41] <PCW> For programming the onboard flash via JTAG you need a hex file and its terribly slow so I never do that
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[23:07:21] <mozmck> Oh, I see - I think.
[23:07:40] <PCW> instead I program the FPGA directly via JTAG and the program the flash via Ethernet
[23:07:54] <PCW> then program
[23:08:09] <PCW> much faster and only bitfiles needed
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[23:09:27] <PCW> if the bitgen options are not in the manual the writer should be shot
[23:09:30] <mozmck> So if I haven't used the -g options then fallback won't work?
[23:09:37] <mozmck> they are :)
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[23:10:13] <mozmck> Now I have to figure out how to set those options in ISE
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[23:10:48] <PCW> Yeah fallback when CRC errors are detected needs those options
[23:11:27] <PCW> (so if you pull the plug when programming for example, you can recover)
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[23:12:03] <mozmck> That makes sense. I do something similar in my bootloader on my microcontroller projects.
[23:13:18] <PCW> unrecoverable are wrong ucf, wrong bitfile (right chip but wrong hardware) etc
[23:13:47] <PCW> (well unrecoverable on cheapo 1 EEPROM cards like the 7I92)
[23:16:14] <mozmck> So how do I set those options?
[23:17:12] <PCW> They should be set if you used our project file let me check with 13.3
[23:18:47] <PCW> on 13.3 its in the properties of Generate Programming File
[23:20:02] <PCW> 14.x seems the same
[23:20:39] <mozmck> I see them under the Process Options for Generate Programming File
[23:21:06] <mozmck> Looks like they are set. I'm using 14.7
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[23:29:20] <mozmck> PCW: Looks like it worked!
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[23:37:41] <PCW> Jolly Good!
[23:40:03] <PCW> The $39 Ebay DC7800 runs hm2_eth at 4 KHz (at least for a few hours so far)
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