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SMT electronics assembly manufacturing forum.


Machine capabilities

Views: 6792

#62542

Machine capabilities | 26 August, 2010

Is there ever a point in the life span of pick and place equipment when you can expect the machine NOT to be able to produce at a zero defect rate.

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#62543

Machine capabilities | 26 August, 2010

The day you install it.

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#62546

Machine capabilities | 27 August, 2010

There's never a time in any machine's life when it will produce zero defects.

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#62547

Machine capabilities | 27 August, 2010

I do know that the machines will have the tendencies, but we have some older siemens equipment that is notorious for leaving off components. Getting upper management to understand that the machines aren't as capable as they used to be seems hopeless sometimes.

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#62549

Machine capabilities | 27 August, 2010

The machine is intentionally leaving them off because its feeling an age bias? Or decides to drop them after vision on the way to placement, or...? What's the root cause?

Just curious...

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#62550

Machine capabilities | 27 August, 2010

The machine sees the nozzles and thinks that the part is there. The lighting on the machine is in desperate need of an upgrade. Constently having to tweak the GF's to get components to pass vision. We share a line computer between 2 lines and the cameras see things differently.

Therefore we have to sometimes meet in the middle to get parts to pass on both lines simultaneously. Its a real pain, but haven't been able to convence that we need another line pc.

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#62552

Machine capabilities | 27 August, 2010

Have you tried replacing the LEDs in the illuminator? This is about the only 'wear' mechanism on a vision system, and should be pretty easy to fix.

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#62589

Machine capabilities | 1 September, 2010

A component placer performance can be kept alive if proper maintenance is carried out regularly. During such maintenance, all functions including component recognoition and illumination levels should be verified and any wear-out part replaced if required. As a process person, I agree with management that equipment ageing does not justify decline in equipment performance. However, capabilities may get restricted over a period, as recent designs demand greater capabilities to handle smaller components.

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#62594

Machine capabilities | 1 September, 2010

Are Any of you driving the same vehicle you drove 20 years ago? With most, if not all of you answering no, why not? Shouldn't regular maintenance keep the vehicle running well past 200,000, 300,00 or even 500,000 miles?

My boss also thinks that with regular maintenance our pick-n-place machine should run the same performance levels as when it was new 15 years ago. We all know that even with regular maintenance, as a machine gets older more things start to wear down or break down. There gets to be a point where the down time and maintenance costs exceed the costs of getting a newer machine.

I am all for maintaining a machine and getting the most use out of it you can. However, there does come a point where the costs of keeping an older machine running well are outweighed by the benefits of getting a newer machine. Trying to convince management that this point comes sooner rather than later is often a hard thing to do.

Good luck. It has taken a major breakdown plus showing my boss the increased time our operators are putting in tweaking the settings on our machine to finally convince her that a newer machine is needed.

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#62614

Machine capabilities | 2 September, 2010

Are we now talking about some "Vintage Collection" cars or the regular ones that do not have much re-sale value? In the former case, it would surely be worth spending on maintenance. However in case of SMT line equipments, one should consider 7-10 years as a fair performance measure, to remain competitive in business and derive maximum returns on investment. Again leads to a business case.

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#62630

Machine capabilities | 2 September, 2010

a quick search on "life expectancy of linear bearings" will give you a clue on how any pick&place machine performance will decline with time. It's measured in distance travelled. So the more you use them, the more they wear out, the less precise the placement, regardless of the amount of maintenance.

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#62631

Machine capabilities | 2 September, 2010

PCB equipment

SMT Machines