Also, bring your own parts.

 The machine sales folks have already figured out which brands of 0402 parts
place better.

 Not as much of a problem with larger parts.

Bob Kondner

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Rex Waygood
Sent: Wednesday, December 02, 2009 10:41 AM
To: [log in to unmask]
Subject: Re: [TN] Component Placement Rates

If you have made your short list then get them to run some actual pcb
data through their optimisation software, go for 2 or 3 pcbs to
represent the kind of work you do.
This will do a lot of things.
It will give you a better idea how your jobs will actually run on their
machines.
It will give you an opportunity to see how easy it is for them to take
in your data and optimise a P&P prog. Obviously you get them to say how
easy it is for them to input data and optimise before you drop the data
on them :-)
If you buy their machine you can make it a contractual requirement that
on those real jobs the actual net rate will reasonably match the
prediction.
Doing real jobs like this will often reveal the "Ah buts" that are not
in any spec sheet.

Don't forget to take into account change over times and the costs of all
the extra bits you need to achieve those changeover times!

Regards
Rex

Rex Waygood
Technical Manager
 
Hansatech EMS provides value manufacturing through engineering and
quality
 
Hansatech EMS Limited
Benson Road
Nuffield Industrial Estate
Poole
Dorset
BH17 0RY
 
+44 (0)1202 338200


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Blair Hogg
Sent: 02 December 2009 14:18
To: [log in to unmask]
Subject: [TN] Component Placement Rates

Hi Technetters,

I've looked at machine specifications that quote placement rates per
IPC9850. 
How do these rates compare with actual throughput? If a machine quotes
20,000 CPH per IPC 9850, and a PCBA has 2000 components, should the
machine be able to produce a board every 6 minutes? 

Obviously, nozzle changes will reduce throughput, as will layout and de-
optimziation of the placement (layout, feeder positioning, etc.). 

Has anyone looked at actual performance vs. quoted performance to get a
real world estimation?

Thanks,

Blair

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