I just reviewed one past job. My notes on the PCBcart order form for one of the files read "size is two boards same size one slot each see Huang". The tooling cost was consistent with the area of the combined pair of boards.
This followed an email exchange:
Response:
Do you
panel?
And even though they V-groove_and_snap rather than rout, they accepted the file with 100 thou separation between the two designs.
Having just looked up recent orders for another post inthis thread, I noticed one ex PCBcart for 100 pieces 1.2" x 0.75".
Tooling (setup) - which is a once-only charge with them unlike some fabs - $37.80. Per board (area) cost $0.57. All up cost $94.80 or
95c each.s t
r -
my
per
een
be
NEW.PCB. Do you
t on panel?
So, what is their concept/definition of different designs? Perhaps they should remove that from their quotation screen.
The scope is 20 GHz, 17 pS spec'd risetime. It's my pin driver circuit that's slow. Here it is as a product:
The undershoot is my bad on the pcb layout. I'll fix that some day.
John
On a sunny day (Mon, 08 Feb 2010 18:51:08 -0800) it happened John Larkin wrote in :
Yes, that is what I mean, I could do a board with those speeds, but have no way to check it. Well I have not personally had a request for anything like that, I will keep you in mind if it happens. For equipment, before such a fast scope, on my wish list would be a good *cheap* spectrum analyser Got an email from Altera today, about ASTA and their FPGAs. If I understand it right, that could mean eliminating a PC mobo... and then there are those 18 Gbits / second serial links sigh...
255FBNEW.PCB. Do you
panel?
No idea. I only know what they have done with my jobs. But where I am unsure how a file/job will be treated ,I ask (as above). So far the answers haven't been unpleasant.
this
about
Case 1 the PWB fab house sees exactly one layout for all variations=20 and does not populate the boards; don't ask, don't tell -> no premium.
Case 2 the PWB fab has to differentially stuff the boards -> lots of=20 extra housekeeping on their part; depending on volume, ordering them=20 separately may get better deals.
cancel
are
how
the
charge more?
charging
IDo i correctly understand that it is the exact same Gerbers and Excellon=20 and soldermask and silk screen for all 8 cases? And that they are only=20 providing blank PCBs? If so don't tell them.
cel
re
how
the
rge more?
rging
IYes, you are correct. They see different functional modules on the PCB and want to charge more. They don't have to do anything else with the additional designs. This usually cause delays on the job, so I either pay or suffer the delay. It's the industry's best kept dirty secret.
cancel
they are
to
know how
(where the
charge more?
charging
=A0Usually, I
nonsense.
except
designs
Excellon
only
=46irst, remind them just what you are paying them for. Then it is time to try some other vendors, just to find out.
cancel
y are
onow how
re the
charge more?
charging
y, I
e.
ept
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nly
Yeah, a coupla good approaches with 'negotitations' like this are to ask them "If you were in my position, how would you feel about pricing like this?"
also, "Why are you trying so hard to never do business with me again?"
The nice thing about combined designs is that you're unlikely to be in all that much of a hurry (otherwise you'd not have bothered combining) so there is time to shop around or ask for a quotation then not place the order if they don't want to do business.
Best regards, Spehro Pefhany
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
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