#emc | Logs for 2009-07-26

[02:12:08] <SWPadnos> I wonder which idiot it was that decided to make a part with an M20.5x1.0mm thread
[02:16:56] <toastyde1th> what's wrong with m20.5x1
[02:17:22] <SWPadnos> well. if I had either a CNC lathe or an M20.5x1 tap, it wouldn't be so bad
[02:17:22] <jepler> perfectly easy to make on your cnc
[02:17:27] <SWPadnos> ^^
[02:19:01] <toastyde1th> Or manual lathe?
[02:19:09] <Jymmm> SWPadnos: Um, what was that thing you drove around the world in 20 feet of snow, then had parked outside your igloo for like 14 years?
[02:19:14] <SWPadnos> if I had one of those, it would be marginally esier
[02:19:18] <SWPadnos> easier
[02:19:46] <SWPadnos> Jymmm, you mean the not-exactly-working ready-for-retrofit lathe?
[02:20:11] <Jymmm> SWPadnos: A what did you say? a CNC LATHE was it????
[02:20:32] <SWPadnos> a lathe that's not yet retrofitted doesn't count
[02:21:10] <Jymmm> why did oyu get rid of it anyway?
[02:21:19] <SWPadnos> I didn't
[02:21:23] <SWPadnos> it's in the garage now
[02:23:46] <Jymmm> SWPadnos: Got parts et?
[02:23:48] <Jymmm> yet
[02:23:55] <SWPadnos> for the lathe?
[02:24:12] <Jymmm> no, the spacecraft.
[02:24:15] <SWPadnos> no
[02:24:30] <SWPadnos> I haven't finished the zero-point energy antigravity drive yet
[02:25:01] <Jymmm> SWPadnos: screw that.... nuclear fusion and be done with it.
[02:25:14] <SWPadnos> nah. uses fuel
[02:25:23] <Jymmm> SWPadnos: Next timee you're out, we'll head of to LL
[02:25:29] <Jymmm> s/of/over/
[02:25:35] <SWPadnos> OK by me
[02:25:37] <SWPadnos> if we can get in ;)
[02:25:50] <Jymmm> SWPadnos: We can, if we schedule it right
[02:25:53] <Jymmm> (seriously)
[02:26:03] <SWPadnos> let me know then
[02:26:06] <SWPadnos> (seriously)
[02:26:16] <Jymmm> There's a monthly ham radio meeting iirc
[02:26:25] <SWPadnos> mmmm. ham
[02:26:35] <SWPadnos> I guess I'm hungry
[02:26:37] <Jymmm> I dont know if we cna see the partical accelerator or not though
[02:26:53] <Jymmm> well, the inside of it that is
[02:27:08] <Jymmm> the outside you can see from the freeway as you drive over it
[02:27:27] <SWPadnos> I'll bring my hadron-resistant suit, just in case
[02:29:41] <jimbo_> When using an OPTO22 card and a MESA 5i20 can any pin be assinged as an input or output?
[02:29:42] <Jymmm> good idea
[02:30:46] <SWPadnos> jimbo_, yes
[02:30:55] <jimbo_> Thanks
[02:31:01] <SWPadnos> but only with the hostmot2 driver
[02:32:02] <Jymmm> SWPadnos: Sorry it's Stanfords that you drive over... http://maps.google.com/maps?f=q&source=s_q&hl=en&q=Stanford+Accelerator+Center,+Menlo+Park,+San+Mateo,+California+94025&sll=37.713973,-121.703796&sspn=0.134167,0.178528&ie=UTF8&cd=1&geocode=FUD3OgIdtVW3-A&split=0&ll=37.415471,-122.221227&spn=0.016838,0.038667&t=h&z=15
[02:32:24] <Jymmm> SWPadnos: that horizontal line is it
[02:34:11] <SWPadnos> oh - it's linear. must be small
[02:34:19] <Jymmm> 2.5 miles
[02:34:30] <SWPadnos> tiny :)
[02:36:01] <Jymmm> Is this the Scientist verions of a checkered flag? http://maps.google.com/maps?f=q&source=s_q&hl=en&q=Stanford+Accelerator+Center,+Menlo+Park,+San+Mateo,+California+94025&sll=37.713973,-121.703796&sspn=0.134167,0.178528&ie=UTF8&cd=1&geocode=FUD3OgIdtVW3-A&split=0&t=h&ll=37.416408,-122.20499&spn=0.000503,0.001021&z=20
[02:36:27] <Jymmm> it's onlyon one end
[02:37:06] <SWPadnos> that's a long building
[02:37:28] <SWPadnos> I was thinking the line was what we could see from the construction of an underground system
[02:37:30] <Jymmm> Like I said, it goes under the freeway
[02:37:48] <Jymmm> nope, all above ground
[02:38:58] <Jymmm> SWPadnos: http://www.norcalblogs.com/watts/images/slac_vanish.jpg
[02:39:03] <SWPadnos> lots of photo transitions along that building
[02:39:22] <Jymmm> thats an insode photo
[02:39:53] <SWPadnos> cool
[02:40:14] <Jymmm> http://upload.wikimedia.org/wikipedia/commons/8/87/SLAC_long_view.jpg
[02:40:50] <SWPadnos> someone needs a more sensitive camera
[02:41:02] <SWPadnos> and/or a tripod :)
[02:41:38] <toastyde1th> or a 14kw zenon flashlamp
[02:41:43] <toastyde1th> xenon
[02:41:48] <toastyde1th> jesus did i really just say zenon
[02:41:48] <SWPadnos> or 28 500W ones
[02:41:54] <SWPadnos> yez, u did
[02:42:11] <toastyde1th> i have nothing else to say, out of shame
[02:42:36] <toastyde1th> that's a linear accelerator?
[02:43:02] <SWPadnos> snacktime. bbiab
[02:43:05] <Jymmm> toastyde1th: No, a popcorn popper. I thought you weren't gonna say anything else?
[02:43:22] <toastyde1th> you probably could pop popcorn with that
[02:43:42] <Jymmm> weird science style
[02:43:47] <toastyde1th> i hadn't read the backscroll, so it was just a long hallway with crap on one side of it
[02:44:06] <Jymmm> toastyde1th: It's he Stanford Linear Accellerator
[02:44:14] <Jymmm> s/he/the/
[02:44:24] <Jymmm> 2.5 miles long
[02:44:50] <toastyde1th> that's not a moon
[02:45:18] <Jymmm> toastyde1th: http://maps.google.com/maps?f=q&source=s_q&hl=en&q=Stanford+Accelerator+Center,+Menlo+Park,+San+Mateo,+California+94025&sll=37.713973,-121.703796&sspn=0.134167,0.178528&ie=UTF8&cd=1&geocode=FUD3OgIdtVW3-A&split=0&ll=37.415471,-122.221227&spn=0.016838,0.038667&t=h&z=15
[02:45:54] <Jymmm> toastyde1th: that big long horizontal line is it
[02:46:00] <Jymmm> zoom in
[02:46:06] <toastyde1th> a very, very long hallway with crap on one side
[02:46:19] <toastyde1th> i especially like the part where the freeway goes over it
[02:47:01] <Jymmm> me too
[02:50:23] <toastyde1th> i'd also have thought the business end of the thing would be a bit bigger
[02:51:16] <Jymmm> well, seeing the the inside is less than 12" I'd hope noght =)
[02:51:24] <Jymmm> not
[02:53:17] <toastyde1th> =(
[05:32:29] <Jymmm> SWPadnos: Which 3Ware card do you have?
[09:20:02] <toastyde1th> i forget that most people don't know the difference between an automatic and a manual transmission is internal, and has nothing to do with driver control
[09:20:13] <toastyde1th> then i remember i am nerdy, and it makes sense
[10:35:34] <Xteven> when I need to use 2 drillbits to make a part using EMC, does EMC pause and prompt me to change the drillbits ?
[12:21:13] <robh> hi when run stepconfig i get this error http://pastebin.ca/1507836
[12:22:50] <BigJohnT> uncheck create desktop shortcut
[12:25:07] <robh> tht worked
[12:26:22] <BigJohnT> its borked atm
[12:27:32] <robh> aah friend was just trying it at least quick getaround
[13:04:16] <alex_joni> robh: should be fixed in the next release
[13:06:29] <joeyk__> joeyk__ is now known as joeyk
[13:13:47] <robh> not a problem alex_joni , also dont seem to have chargepump output on parallel but iv not looked into it yet hal looks right but no enable signal out
[13:35:58] <ilya_> what kind of emergency stops can be added to the system? Few normally-closed switches at any necessary places close to the machine, itself, right?
[13:38:44] <ilya_> which turn off the power supply to steppers, or to a breakout board.
[14:39:28] <Xteven> ilya_: there are those limiting switches
[14:39:36] <Xteven> but I'm not sure where they fit in
[14:39:54] <Xteven> except that they are triggered when you move out of the acceptable area
[14:40:51] <SWPadnos> you can also have a separate E-stop chain, with one or more switches in it
[14:41:07] <SWPadnos> like a big red mushroom switch that says "E-STOP"
[14:41:25] <SWPadnos> also door switches and the like would probably be in that chain
[14:42:43] <ilya_> gecko's manual says something about it.
[14:45:47] <ilya_> OK
[14:48:10] <Xteven> cool
[14:48:38] <Xteven> oh, I take it there is a way to position pre-fabricated parts under an EMC2 controlled CNC machine ?
[14:48:54] <Xteven> I should try out the live cd
[15:31:41] <tom1> tom1 is now known as tom3p
[16:06:09] <ilya_> What are standard feedrates? At least which one to think about?
[16:06:28] <ilya_> 50 mm/s?
[16:06:56] <ilya_> for metal cutting (with bits) machines
[16:08:23] <ilya_> *with milling cutters
[16:09:02] <DaViruz> i usually run around 500mm/min
[16:09:21] <DaViruz> with a machine that leaves a lot to be desired in terms of rigidity..
[16:09:22] <ilya_> DaViruz: thanks.
[16:09:55] <DaViruz> but of course it depends on a lot of factors, cutter geometry, number of cutting flutes, depth of cut..
[16:10:05] <ilya_> I'm trying to calculate the thickness of metal to be cut and therefore maximal forces
[16:10:25] <SWPadnos> material being cut, cutter material, cutter coating, coolant type, spindle horsepower ...
[16:11:33] <ilya_> What if I try to make such machine myself? If it will be poor in rigidity, I will have to run it with low feedrate, right?
[16:11:34] <DaViruz> that too
[16:11:44] <ilya_> And it will work.
[16:12:17] <ilya_> But I probably need a maximal possible rigidity, right?
[16:12:19] <DaViruz> ilya_: yes, and low depth of cut
[16:12:52] <ilya_> DaViruz: low depth = cut twice same path, right?
[16:13:38] <ilya_> For this sake, DXF2GCODE program is good, free and written in python, though understands only the `0' layer from DXF
[16:14:09] <ilya_> oh, i'm starting to understand this all.
[16:16:18] <ilya_> i thought about two leadscrews, made of pipe, and small cheap roll bearings at the end. these leadscrews could bear the carriage.
[16:22:20] <cradek> you probably won't be able to cut metal with that
[16:31:43] <cradek> cradek has changed the topic to: Welcome! EMC (Enhanced Machine Controller) is a linux-based opensource CNC control. | Latest release: EMC 2.3.3 | http://www.linuxcnc.org | http://wiki.linuxcnc.org | Channel logged by logger_emc
[16:34:16] <Jymmm> SWPadnos: What 3Ware card do you have?
[16:43:14] <ilya_> cradek: ah... i just trying to imaging. I actually should look some analogs before i try to imagina a prototype
[16:44:12] <cradek> what do you want to cut?
[16:44:28] <Jymmm> 3/4" SS
[16:45:00] <ilya_> cradek: 5 mm-thick metal sheets
[16:45:36] <cradek> what metal?
[16:45:57] <ilya_> construction steel
[16:47:15] <cradek> with extreme patience you might be able to cut 5mm steel (in many passes) with a tabletop machine weighing only 75-100 kg
[16:47:57] <cradek> you simply cannot make a machine out of wood/drawer slides/skate bearings and cut steel with it
[16:48:59] <ilya_> cradek: i imagined two pipes 3 in in diameter and another ewo pipes, and a spindle
[16:49:19] <ilya_> and some small (=cheap) roll bearings
[16:50:11] <cradek> I wonder if you'd have better luck with plasma/laser if you want to cut only sheets
[16:50:20] <ilya_> one pipe has a thread, another is just smooth,
[16:50:22] <cradek> you'd have a fighting chance of making a machine to do that, because there is no cutting load
[16:50:44] <cradek> this kind of building is outside of my realm of expertise
[16:50:49] <SWPadnos> Jymmm, 9650SE
[16:51:29] <Jymmm> number of ports?
[16:51:29] <SWPadnos> 4
[16:51:29] <cradek> bbl
[16:53:16] <Jymmm> SWPadnos: Hmmmm, I dont think they make a riser crd for PCIe
[16:53:34] <SWPadnos> I'm pretty sure I just saw some
[16:53:36] <SWPadnos> one sec
[16:54:01] <SWPadnos> 2u?
[16:54:04] <SWPadnos> or 1u?
[16:54:16] <Jymmm> 2U three slots
[16:54:50] <ilya_> what is a common practices to fit metal sheets on a table?
[16:54:59] <SWPadnos> so low profile cards will work without a riser
[16:55:25] <SWPadnos> http://www.plinkusa.net/riser.htm
[16:55:34] <Jymmm> SWPadnos: I doubt it, the case backplane is offset and at a right angle
[16:55:54] <SWPadnos> huh?
[16:56:55] <Jymmm> Where the PCIe 1x slots are, are not aligned with the slots in the rear of the case
[16:58:15] <SWPadnos> but they have horizontal slots that would line up with a riser?
[16:58:16] <Jymmm> oh, they use ribbon cables. Hmmm, wonder how that stays secure
[16:58:36] <Jymmm> let me look again...
[16:58:57] <SWPadnos> you can't expect a riser to hold a card without also having a screw/bracket
[16:59:16] <SWPadnos> if you need to, you can remove the bracket (from many cards) and rig something up
[17:00:05] <Jymmm> Ok, the two PCIe 1x slots are "overlapping" the card slots
[17:00:11] <Jymmm> the x16 isn't
[17:03:12] <Jymmm> SWPadnos: http://www.tyan.com/product_board_detail.aspx?pid=85
[17:05:49] <SWPadnos> it sounds like the motherboard is installed wrong
[17:06:13] <Jymmm> lol, there's only one set of mountng holes =)
[17:06:28] <Jymmm> unless I turn the mobo upside down
[17:06:34] <ilya_> it happens
[17:06:48] <Jymmm> no, that won't work either, one hole is offset
[17:07:08] <kanzure> does anyone have experience with "project management software"/ERP and is it not just a buzzword?
[17:07:20] <kanzure> i.e., does any of it actually interface with emc?
[17:07:39] <SWPadnos> too funny. I have that motherboard ;)
[17:08:00] <SWPadnos> kanzure, there is no ERP interface that I'm aware of
[17:08:15] <Jymmm> SWPadnos: Yeah?
[17:08:26] <SWPadnos> you could remotely control EMC2 machines with ERP software, if you write it correctly
[17:08:36] <kanzure> SWPadnos: right, but I'm just wondering if someone has already done it
[17:08:43] <SWPadnos> Jymmm, yeah. it's in my closet, and I don't remember why I'm not using it
[17:08:53] <SWPadnos> kanzure, no, not that I'm aware of
[17:09:07] <kanzure> have you ever used ERP-stuff? I haven't.
[17:09:25] <SWPadnos> not personally
[17:09:33] <kanzure> ok. maybe it is a load of crap.
[17:09:42] <Jymmm> SWPadnos: I have 2 1U's, I pulled it from the 1U and tossed it in to the 2U
[17:10:19] <Jymmm> SWPadnos: It needs a 8pin from the PS. maybe that's why?
[17:10:37] <SWPadnos> I wonder if I just didn't have a socket 939 CPU for it
[17:11:26] <SWPadnos> oh - that could be it. I bought it off eBay as a combo with a Opteron 165, but it turned out that it wasn't a combo, it was just the motherboard
[17:11:43] <SWPadnos> it was still a good deal, so I decided to keep it instead of fedexing it baxk to them on fire
[17:11:45] <SWPadnos> back]
[17:11:47] <SWPadnos> \]
[17:11:49] <SWPadnos> -]
[17:11:53] <Jymmm> SWPadnos: Ah. I was able to install ESXi on it
[17:13:02] <Jymmm> SWPadnos: Anywho... you can see why I'd need some type of riser.
[17:13:25] <SWPadnos> you may need to get it from the case manufacturer
[17:13:42] <Jymmm> hmmmm, let me check...
[17:13:45] <SWPadnos> that's a standard footprint motherboard
[17:14:04] <SWPadnos> I have the -RS version. I wonder what the difference is
[17:14:12] <Jymmm> can a pcie 1x fit into a x16 slot?
[17:14:17] <SWPadnos> yes
[17:14:25] <SWPadnos> it will only operate at 1x of course
[17:14:42] <Jymmm> The slots look different - the key s on the opposite side
[17:14:55] <SWPadnos> key?
[17:15:01] <SWPadnos> you mean the retaining tab?
[17:15:05] <Jymmm> in the slot itself
[17:15:15] <SWPadnos> uh
[17:15:40] <SWPadnos> no
[17:16:07] <SWPadnos> it just looks weird because the "back part" is smaller. the section near the slot covers (in a normal case) is the same size
[17:16:07] <Jymmm> oh, I guess not. nm
[17:16:10] <ilya_> What is the `riser'?
[17:16:28] <SWPadnos> ilya_, see the photos here: http://www.plinkusa.net/riser.htm
[17:16:34] <ilya_> ok
[17:17:02] <ilya_> Pink's boyfriend probably ;)
[17:21:04] <ilya_> Where do those small connectors should be connected? some places on the motherboard? I don't remember any.
[17:24:09] <ilya_> Small connectors are USB slots?
[17:41:42] <Jymmm> SWPadnos: Ok, looking at this pic, the x16 slot is at Slot #7
[17:41:45] <Jymmm> http://www.rackmountmart.com/html/rc1.htm
[17:42:01] <SWPadnos> yep. looks that way
[17:42:43] <Jymmm> SWPadnos: click on the back view here http://www.cidesign.com/product_detail.jsp?productID=60&region=us
[17:43:25] <SWPadnos> ok. I can't see if that top slot is really a slot
[17:43:47] <Jymmm> SWPadnos: Do you see the set of vertical vent holes just to the right of the mobo IO insert?
[17:44:08] <SWPadnos> yes. I can se ethat the case doesn't allow you to use a card in the PCIe x16 slot
[17:44:09] <Jymmm> it's the only column of hole that goes full height
[17:44:37] <Jymmm> THAT's where the x16 slot is - so it's close.... REALLY close.
[17:44:52] <SWPadnos> you need a 3-slot riser
[17:44:58] <Jymmm> Yea, there are three horizontal card slots.
[17:45:01] <SWPadnos> (or less, if you don't need all 3 slots)
[17:45:43] <SWPadnos> looks like R2018 from rackmountmart
[17:46:08] <SWPadnos> or R2022
[17:46:17] <Jymmm> That says on slot #6, need on slot #7
[17:46:36] <Jymmm> but no PCI
[17:46:47] <SWPadnos> 2022 has PCi
[17:46:49] <SWPadnos> PCI
[17:46:57] <SWPadnos> as does 2018
[17:47:25] <Jymmm> I need two pcie slots, not PCI
[17:47:45] <SWPadnos> what you need to see is which slot the riser needs to go into so that the cards line up with the horizontal slot covers
[17:48:12] <Jymmm> #7
[17:48:20] <SWPadnos> 2025 is the closest then
[17:48:32] <SWPadnos> I don't know how you'll cut down the second ribbon to x1
[17:48:43] <SWPadnos> or if it will reach to slots 1/2
[17:49:04] <Jymmm> That's pretty ugly, plus the physical mounting internally
[17:49:14] <Jymmm> http://www.rackmountmart.com/prodspics/r2025-7-02.jpg
[17:49:46] <SWPadnos> yep. it's pretty nasty
[17:49:53] <SWPadnos> so you need two PCIe cards?
[17:50:19] <Jymmm> SWPadnos: If I get two 4 port sata cards, yes.
[17:50:29] <SWPadnos> get 1 8-port instead ;)
[17:50:42] <Jymmm> Still need a riser either way.
[17:50:57] <SWPadnos> but a single PCIe (with or without some PCI thrown in) would do
[17:51:58] <SWPadnos> see if you can get a case back replacement so you can use low profile cards
[17:52:10] <Jymmm> yeah
[17:52:12] <SWPadnos> the 3ware is low profile, there are low profile video and LAN cards ...
[17:52:42] <Jymmm> but the slots in the case are horizontal, not vertical
[17:53:04] <SWPadnos> see if you can get a case back replacement so you can use low profile cards
[17:53:54] <Jymmm> Slot #7 is not acesable from the rear even if I do
[17:54:06] <Jymmm> it's behind those vent holes
[17:56:30] <cradek> well I figured out why there is no big transformer - the servo dc supply is not isolated
[17:56:36] <cradek> is this typical? seems scary.
[17:56:53] <Jymmm> switching PS ?
[17:57:09] <cradek> nope
[17:57:49] <Jymmm> Well, if there's no xfmr there has to be magnetics, mabe a torroid?
[17:58:17] <cradek> no, 3 phase 240 to huge diodes to huge caps
[17:58:34] <Jymmm> weird
[17:58:57] <cradek> to huge transistors of some kind, to huge servos
[17:59:08] <Jymmm> 240 3ph what is this? a 10hp motor?
[17:59:45] <cradek> no, this is the servo (axis) motors supply
[18:00:57] <Jymmm> Must be some big ass triacs in there
[18:01:24] <Jymmm> like would need a 11/16 wrench or something
[18:03:54] <alex_joni> cradek: on our latest gen. of robots we simply have a erctifier from 400V AC
[18:04:11] <alex_joni> so you get a 565V DC bus, and there's no separation transformer
[18:04:29] <alex_joni> there is a sep. transformer for the PC/computer and IO part, only the servo stuff isn't
[18:05:46] <Jymmm> SWPadnos: http://www.supermicro.com/support/resources/Riser/#2U Bottom of list: RSC-R2UW-3E8
[18:15:14] <SWPadnos> Jymmm, that should work
[18:15:16] <Jymmm> SWPadnos: FSCK ME!!! $100 for a riser card?!
[18:15:20] <Jymmm> http://www.wiredzone.com/itemdesc.asp/ic/10017937/Supermicro/RSC-R2UU-UA3E8
[18:15:43] <SWPadnos> if not, get one of these: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270419488595
[18:16:29] <Jymmm> I might get one of those Acer boxes instead
[18:16:37] <SWPadnos> wimpy
[18:16:47] <Jymmm> ok, 2 of those acer boxes
[18:16:56] <SWPadnos> more like 24 :)
[18:16:59] <Jymmm> Just wipe out M4 and install linux
[18:17:02] <Jymmm> M$
[18:17:59] <Jymmm> SWPadnos: I read the manual, the OS is installed on the 1st hdd. instead of embedded
[18:18:30] <SWPadnos> wow. that PC was $44000 a month ago (with hard drives though)
[18:18:46] <Jymmm> SWPadnos: http://newspaperads.mercurynews.com/ROP/ads.aspx?advid=32664&adid=8104962&subid=26353009&type=
[18:18:48] <SWPadnos> they said that in the ad
[18:19:35] <Jymmm> I'm not paying $100 for a passive fscking riser card
[18:21:33] <SWPadnos> what CPU do you have in the Tyan?
[18:21:42] <Jymmm> I dun know
[18:21:54] <Jymmm> Opteron 170 is what it says at boot
[18:22:03] <SWPadnos> actually, you'd be better off paying $100 for a different motherboard - one that has two PCIe slots closer to slot 7
[18:22:24] <SWPadnos> then get a simple riser (though the others may be relatively expensive too)
[18:22:31] <Jymmm> doesn't matter, STILL need a riser card to get the right angle
[18:22:37] <SWPadnos> of course
[18:22:40] <SWPadnos> the case requires that
[18:22:48] <SWPadnos> so it makes no difference what you do otherwise
[18:23:11] <SWPadnos> but, you may be able ot improve performance and get a less expensive riser card at the same time
[18:23:45] <SWPadnos> you could also just get one of the ones from rackmountmart, but not connect the second slot
[18:24:05] <SWPadnos> if you need another RAID card, you get a motherboard that has a second PCIe in slot 5 or 6
[18:25:53] <Jymmm> I wonder if weird stuff might just have some pcie riser cards
[18:26:12] <SWPadnos> could be, but I'd be surprised if they had the exact one you want :)
[18:26:39] <Jymmm> well, that's where I got it from, I suspect they just pulled it out
[18:27:02] <SWPadnos> oh. could be
[18:32:40] <Jymmm> Well, i guess I know where I'm going to today....
[18:53:45] <alex_joni> http://cgi.ebay.com/HP-RACK-W-QTY-32-DL360-G3-DUAL-3-2GHZ-2-X-73GB_W0QQitemZ380139459713QQcmdZViewItemQQptZCOMP_EN_Servers?hash=item588213d481&_trksid=p3286.c0.m14&_trkparms=65:12|66:2|39:1|72:1234|293:1|294:50#ht_5256wt_905
[18:55:49] <alex_joni> good night all
[19:05:05] <Jymmm> * Jymmm sends alex_joni the electric bill
[20:04:25] <DaViruz> hmm, the motion hal component outputs rotations per minute for spindle-speed-out, but the stepgen component wants units per second, what's the best way to translate? put a scale component in between?
[20:35:33] <pjm> DaViruz are u using stepgen in velocity mode to generate spindle speed?
[20:36:17] <pjm> there is a short description at http://www.cnc4pc.com/Files/EMC2.txt describing how to set up stepgen velocity, u just have to fiddle with the scaleing parms
[20:39:17] <DaViruz> pjm: yes
[20:39:52] <pjm> ah yes its the same method i use to command my VFD via a pulse train output from stepgen in velocity mode, works very well
[20:39:54] <DaViruz> i don't want to set a funky scale in stepgen since i also want to use the feedback from stepgen to do rigid tapping
[20:41:04] <pjm> yep that makes sense, i have used 1Hz/rpm to control my VFD since it made life simpler from the scaleing perspective
[20:41:20] <pjm> and u presumably already have a spindle encoder with a/b/index outputs
[20:41:37] <DaViruz> i do
[20:43:38] <pjm> in that case it should be fairly simple to configure
[20:43:49] <pjm> it sounds pretty close to the config i have running
[20:44:03] <pjm> so if u need any of my config files etc to look at I can put them on my www
[20:50:57] <DaViruz> however i'm not going to use the spindle encoder for feedback to emc2, the idea is to generate fake feedback in HAL (from the stepgen component)
[20:53:05] <pjm> will that work for rigid tapping?
[20:54:25] <DaViruz> i think so
[20:54:41] <DaViruz> the spindle motor is a servo, so it should be accurate to the step pulses
[20:57:07] <DaViruz> assuming the scale etc is equally accurate
[20:58:26] <pjm> ok but if the motor slows very slightly under load of a tap emc wont be able to correct the relative Z speed so would probably strip the thread / break the tap?
[21:01:01] <DaViruz> hm yeah possibly
[21:01:57] <DaViruz> not sure how accurate/fast the servo is
[21:03:09] <pjm> if u already have the encoder on the spindle its really worth the effort to configure and use it, it can be very handy for later things like closed loop spindle speed control etc
[21:20:47] <DaViruz> i suppose, but i will need additional io for that
[21:21:06] <DaViruz> should probably get a mesa 5i20 card
[21:22:04] <pjm> yes i'm using many parports currently, and plan to either get a 5i20 or 7i43, need to have another look really
[21:27:04] <skunkworks> 5i20!
[21:27:08] <skunkworks> :)
[21:27:56] <pjm> yes i'm leaning towards that card i have to say!
[21:28:27] <pjm> i need to support 4 steppers + one velocity mode stepper and encoders / switches / pendant etc
[22:31:02] <SWPadnos> a stepper won't slow down the way a servo does
[22:31:10] <SWPadnos> it will either run at speed or it will stall
[23:22:10] <Jymmm> SWPadnos: http://www.imdb.com/title/tt0796307/
[23:23:28] <Jymmm> SWPadnos: If you liked Spanglish, you should like that one as well
[23:23:36] <SWPadnos> never seen Spanglisn
[23:23:38] <SWPadnos> err
[23:23:40] <SWPadnos> Spanglish
[23:23:59] <Jymmm> SWPadnos: You have netflix?
[23:24:03] <SWPadnos> nope
[23:24:09] <Jymmm> oh, ok
[23:24:17] <Jymmm> bbiab, foodage
[23:24:25] <SWPadnos> yah