How do you design these days?
in [Design]
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From: krw on 5 Jan 2010 18:34 On Tue, 05 Jan 2010 20:39:27 +0000, Baron <baron.nospam(a)linuxmaniac.nospam.net> wrote: >krw Inscribed thus: > >> On Mon, 04 Jan 2010 16:52:09 +0000, Baron >> <baron.nospam(a)linuxmaniac.nospam.net> wrote: >> >>>Spehro Pefhany Inscribed thus: >>>> >>>> With the spindle Morse taper Loctited in so that the side forces >>>> don't loosen it up! >>>> >>>> Best regards, >>>> Spehro Pefhany >>> >>>I've never had a Morse taper fitting loosen due to side forces or had >>>to use Locktite on one. >> >> You haven't put any side pressure on one, then. This is a very common >> occurrence for woodworkers using their drill press as a drum sander; >> not a good thing to do. > >Agreed ! Very definitely not. >I would suspect debris in the taper could cause that, even an oil film >might. Wood dust would be difficult to clean out completely. The Morse >tapers have to be kept scrupulously clean. A draw bar would eliminate >the problem at the risk of loosing concentricity due to any trapped >debris. The debris isn't the issue. Puting side pressure on a drill press will ruin the quill bearings. They're not designed for forces in that direction. A milling machine is. As far as side pressure loosening a MT chuck, do the physics.
From: John Larkin on 6 Jan 2010 09:58 On Tue, 05 Jan 2010 10:47:39 -0800, Joerg <invalid(a)invalid.invalid> wrote: >John Larkin wrote: >> On Mon, 04 Jan 2010 20:31:49 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: >> >>> On Mon, 4 Jan 2010 17:54:46 -0800, "Joel Koltner" >>> <zapwireDASHgroups(a)yahoo.com> wrote: >>> >>>> "krw" <krw(a)att.bizzzzzzzzzzz> wrote in message >>>> news:gj45k5tr1g3rqe72k3tbff33lnke7c5sdk(a)4ax.com... >>>>> On Mon, 4 Jan 2010 15:02:59 -0800, "Joel Koltner" >>>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>>> That's the argument I get from the layout guy. >>>> I know they exist (e.g., the guys at UltraCAD), but so far I've never worked >>>> anywhere where the layout guy was particularly "proactive" in the sense of >>>> suggesting interesting/potentially useful new ways to deal with parts >>>> management... they instead seem to always have a reason why, no, you can't do >>>> it the way you're suggesting (even though you've done so many times over >>>> somewhere else...). C'est la vie... >> >> You haven't worked with The Brat. >> > >Or my layouter for that matter. He always comes up with good ideas. > > >>>> That's a bit more convenient, I just worry that I'll then forget it and that >>>> somehow a DRC run won't catch it either. (We don't have a "formal checklist" >>>> like John says he's working on to catch this sort of thing...) >> >> I'm not working on the checklist... The Brat is! >> > >Still working off that Jeep that she bought with college "savings"? She paid that off ahead of time. I was impressed. She just finished her first PCB layout contract job, $2K for a couple of days work on a 2-sided board. That's the project where I charged the startup $1 to design the product and pseudocode the data acq part of the software for them. These guys are used to working way, way up the abstraction stack (ie, back-end web apps) and are a bit bemused by banging bits with realtime budgets. John
From: Joerg on 6 Jan 2010 11:21 John Larkin wrote: > On Tue, 05 Jan 2010 10:47:39 -0800, Joerg <invalid(a)invalid.invalid> > wrote: > >> John Larkin wrote: >>> On Mon, 04 Jan 2010 20:31:49 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: >>> >>>> On Mon, 4 Jan 2010 17:54:46 -0800, "Joel Koltner" >>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>> >>>>> "krw" <krw(a)att.bizzzzzzzzzzz> wrote in message >>>>> news:gj45k5tr1g3rqe72k3tbff33lnke7c5sdk(a)4ax.com... >>>>>> On Mon, 4 Jan 2010 15:02:59 -0800, "Joel Koltner" >>>>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>>>> That's the argument I get from the layout guy. >>>>> I know they exist (e.g., the guys at UltraCAD), but so far I've never worked >>>>> anywhere where the layout guy was particularly "proactive" in the sense of >>>>> suggesting interesting/potentially useful new ways to deal with parts >>>>> management... they instead seem to always have a reason why, no, you can't do >>>>> it the way you're suggesting (even though you've done so many times over >>>>> somewhere else...). C'est la vie... >>> You haven't worked with The Brat. >>> >> Or my layouter for that matter. He always comes up with good ideas. >> >> >>>>> That's a bit more convenient, I just worry that I'll then forget it and that >>>>> somehow a DRC run won't catch it either. (We don't have a "formal checklist" >>>>> like John says he's working on to catch this sort of thing...) >>> I'm not working on the checklist... The Brat is! >>> >> Still working off that Jeep that she bought with college "savings"? > > She paid that off ahead of time. I was impressed. > > She just finished her first PCB layout contract job, $2K for a couple > of days work on a 2-sided board. That's the project where I charged > the startup $1 to design the product and pseudocode the data acq part > of the software for them. These guys are used to working way, way up > the abstraction stack (ie, back-end web apps) and are a bit bemused by > banging bits with realtime budgets. > Wow, $2k is a rather princely sum for a two day layout. No wonder she's had the Jeep paid off by now :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: John Larkin on 6 Jan 2010 11:30 On Wed, 06 Jan 2010 08:21:52 -0800, Joerg <invalid(a)invalid.invalid> wrote: >John Larkin wrote: >> On Tue, 05 Jan 2010 10:47:39 -0800, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> John Larkin wrote: >>>> On Mon, 04 Jan 2010 20:31:49 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: >>>> >>>>> On Mon, 4 Jan 2010 17:54:46 -0800, "Joel Koltner" >>>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>>> >>>>>> "krw" <krw(a)att.bizzzzzzzzzzz> wrote in message >>>>>> news:gj45k5tr1g3rqe72k3tbff33lnke7c5sdk(a)4ax.com... >>>>>>> On Mon, 4 Jan 2010 15:02:59 -0800, "Joel Koltner" >>>>>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>>>>> That's the argument I get from the layout guy. >>>>>> I know they exist (e.g., the guys at UltraCAD), but so far I've never worked >>>>>> anywhere where the layout guy was particularly "proactive" in the sense of >>>>>> suggesting interesting/potentially useful new ways to deal with parts >>>>>> management... they instead seem to always have a reason why, no, you can't do >>>>>> it the way you're suggesting (even though you've done so many times over >>>>>> somewhere else...). C'est la vie... >>>> You haven't worked with The Brat. >>>> >>> Or my layouter for that matter. He always comes up with good ideas. >>> >>> >>>>>> That's a bit more convenient, I just worry that I'll then forget it and that >>>>>> somehow a DRC run won't catch it either. (We don't have a "formal checklist" >>>>>> like John says he's working on to catch this sort of thing...) >>>> I'm not working on the checklist... The Brat is! >>>> >>> Still working off that Jeep that she bought with college "savings"? >> >> She paid that off ahead of time. I was impressed. >> >> She just finished her first PCB layout contract job, $2K for a couple >> of days work on a 2-sided board. That's the project where I charged >> the startup $1 to design the product and pseudocode the data acq part >> of the software for them. These guys are used to working way, way up >> the abstraction stack (ie, back-end web apps) and are a bit bemused by >> banging bits with realtime budgets. >> > >Wow, $2k is a rather princely sum for a two day layout. No wonder she's >had the Jeep paid off by now :-) We're contracting out an FPGA design for $125 an hour, discounted from the guy's "big company" rate of $175. My lawyer charges $400. John
From: Joerg on 6 Jan 2010 11:45
John Larkin wrote: > On Wed, 06 Jan 2010 08:21:52 -0800, Joerg <invalid(a)invalid.invalid> > wrote: > >> John Larkin wrote: >>> On Tue, 05 Jan 2010 10:47:39 -0800, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> John Larkin wrote: >>>>> On Mon, 04 Jan 2010 20:31:49 -0600, krw <krw(a)att.bizzzzzzzzzzz> wrote: >>>>> >>>>>> On Mon, 4 Jan 2010 17:54:46 -0800, "Joel Koltner" >>>>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>>>> >>>>>>> "krw" <krw(a)att.bizzzzzzzzzzz> wrote in message >>>>>>> news:gj45k5tr1g3rqe72k3tbff33lnke7c5sdk(a)4ax.com... >>>>>>>> On Mon, 4 Jan 2010 15:02:59 -0800, "Joel Koltner" >>>>>>>> <zapwireDASHgroups(a)yahoo.com> wrote: >>>>>>>> That's the argument I get from the layout guy. >>>>>>> I know they exist (e.g., the guys at UltraCAD), but so far I've never worked >>>>>>> anywhere where the layout guy was particularly "proactive" in the sense of >>>>>>> suggesting interesting/potentially useful new ways to deal with parts >>>>>>> management... they instead seem to always have a reason why, no, you can't do >>>>>>> it the way you're suggesting (even though you've done so many times over >>>>>>> somewhere else...). C'est la vie... >>>>> You haven't worked with The Brat. >>>>> >>>> Or my layouter for that matter. He always comes up with good ideas. >>>> >>>> >>>>>>> That's a bit more convenient, I just worry that I'll then forget it and that >>>>>>> somehow a DRC run won't catch it either. (We don't have a "formal checklist" >>>>>>> like John says he's working on to catch this sort of thing...) >>>>> I'm not working on the checklist... The Brat is! >>>>> >>>> Still working off that Jeep that she bought with college "savings"? >>> She paid that off ahead of time. I was impressed. >>> >>> She just finished her first PCB layout contract job, $2K for a couple >>> of days work on a 2-sided board. That's the project where I charged >>> the startup $1 to design the product and pseudocode the data acq part >>> of the software for them. These guys are used to working way, way up >>> the abstraction stack (ie, back-end web apps) and are a bit bemused by >>> banging bits with realtime budgets. >>> >> Wow, $2k is a rather princely sum for a two day layout. No wonder she's >> had the Jeep paid off by now :-) > > We're contracting out an FPGA design for $125 an hour, discounted from > the guy's "big company" rate of $175. > For engineering that's a normal range if he is good. But not at all for layout. If you need a good layouter at a normal price range let me know. Careful with discounting but it's up to the guy to watch out. If he's also working for gvt contract companies they (and then he) may be in a real pickle if he discounts the rate for you guys but not for them. At least if the auditors find out. > My lawyer charges $400. > I know, it's insane. Even my CPA charges $250. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |