Julio,
Purchase a copy of IPC 9850, "Surface Mount Placement Equipment Characterization". Just $75 from your local IPC supermarket. www.ipc.org.
Here is the table of contents:
http://www.ipc.org/TOC/IPC-9850A.pdf
It provides information on just how good is good for pick/place machines.
But as others have pointed out, this assumes good machine and feeder maintenance and set-up practices. Without those, all bets are off.
Odin
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, September 02, 2015 10:51 AM
To: [log in to unmask]
Subject: Re: [TN] RES: [TN] Pick and Place Performance (Reject Rate)
Hi Juliano,
Here is something that you might want to look at to set a benchmark for your machines:
http://www.practicalcomponents.com/home/print-view.cfm?type=pcb&prid=1027&phid=284
Steve
On Wed, Sep 2, 2015 at 6:08 AM, Datacom - Juliano Ribeiro < [log in to unmask]> wrote:
> The components are 0402” up to BGA 50x50.
>
> We joint all data and it is used the same criteria.
>
> Current we have 4 SMT Line (3 Lines with NPM-W @2011 and 1 Line XP1/2
> @2004).
>
>
>
> We would like to use the benchmark index to start the control.
>
>
>
>
>
> Thank you
>
> _____________________________
>
> Juliano Bettim Ribeiro
>
> DATACOM
>
> +55 (51) 8446-2135
>
> +55 (51) 3933-3000
>
> Ramal: 3484
>
>
>
>
>
> De: Larry Dzaugis [mailto:[log in to unmask]] Enviada em: terça-feira,
> 1 de setembro de 2015 17:53
> Para: TechNet E-Mail Forum; Datacom - Juliano Ribeiro
> Assunto: Re: [TN] Pick and Place Performance (Reject Rate)
>
>
>
> What parts are picked?
>
> How old are they?
>
> Were they stored properly?
>
> Are the recommended PM's performed?
>
>
>
> Depends on the machine, feeder, nozzle and part.
>
>
>
> I have parts that are far better than that and marginally designed
> material that is worse.
>
> Parts that vary more than the allowed tolerance tend to have low pick
> rates and ones with inconsistent finishes, badly applied or inflexible
> tape and difficult features for vacuum pick up are lower.
>
>
>
> My information is on a machine that was spec'ed on performance rather
> than price and has less than 4k hours on it.
>
>
>
> It does a terrific job on the jobs in its wheelhouse and not so great
> on ones outside the strike zone. The previous statement can be made
> for most machines still in production.
>
>
>
> A machine and tooling that has not been maintained will have much
> worse results. Nothing new there.
>
>
>
>
>
>
>
> On Tue, Sep 1, 2015 at 3:05 PM, Datacom - Juliano Ribeiro <
> [log in to unmask]> wrote:
>
> Hello to all
>
>
>
> Whats the index acceptable to reject (component pickup error) in the
> pick and place machines?
>
> For example we have 4 NPM-W and today we reject rate is around ~0,03%.
> Is it number 0,03 good rate or not? Whats the index PPM to excellent
> performance to pickup in the pick and place machines?
>
>
>
> Thank you
>
>
>
> _____________________________
>
> Juliano Bettim Ribeiro
>
> DATACOM
>
> ENGENHARIA DE PROCESSOS
> Rua América Nº 1000 - Eldorado do Sul - RS CEP: 92990-000
> +55 (51) 8446-2135 <tel:%2B55%20%2851%29%208446-2135>
>
> +55 (51) 3933-3000 <tel:%2B55%20%2851%29%203933-3000>
>
> Ramal: 3484
> <mailto:[log in to unmask]>
> [log in to unmask] <http://www.datacom.ind.br/>
> www.datacom.ind.br
>
>
>
>
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