Wee Mei,

To the first question:
The best is to get the components with legs of the proper length. Otherwise,
the legs should be trimmed. It is better than short to the body.
However, the trimming should be done before the soldering, because
1.  Trimming after the soldering will leave exposed copper, and
2.  The shock of the cut of thick legs will cause cracks in the soldering.
This is true whether you are using hand cutter or motorized surcace cutter.

To the second question:
Yes, it is possible; however, do not forget to consider the heat of the
resistor: It may affect the adhesive long term strength, and if the adhesive
blocks the air around it it may ovrheat.

Regards
Ofer Cohen
Quality Assurance Manager
SEABRIDGE Ltd.



> -----Original Message-----
> From: Lum Wee Mei [mailto:[log in to unmask]]
> Sent: Friday, February 14, 2003 02:03
> To: [log in to unmask]
> Subject: [TN] Lead Trimming & Gluing components
>
>
> Hello,
>
> I have 2 questions to ask : "Are we allow to trim down the
> leads of the
> power module after assembly just because they will touch the chassis
> cover?" & "Are components such as power resistors allowed to
> be soldered via wires to the PCBs and tab down on the PCBs with
adhesives?"
>
> To me, leads from connectors, power modules are not supposed to be
> trimed regardless before or after assembly. Then I may be wrong.
>
> Any advice out there?
>
> Thanks and regards,
> Wee Mei
>
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