Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Connector Removal

Peterson

#20098

Connector Removal | 28 May, 2002

Hi Jim, Great to have a connector person on-board. Working with backplanes as I do, an expert in the field is always welcome! My question is: How do you feel about connector "removal" tools? Are they worth the money? How would you remove a...8X25 VHDM?

Thanks for your expertise.

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#20107

Connector Removal | 29 May, 2002

Hello Mr. Peterson,

I don't know where you're writing from, but if you're more than 25 miles from Rhode Island, I'll humbly and graciously accept the "expert" title.

In general, I have to say that the backpanel removal tools are worth the money. As I�m sure you�re aware, scraping a single backpanel can cost well into the thousands of $. Trying to repair a complex high density backpanel connector without the proper tooling may destroy the backpanel PCB.(Hint: if the connector removal is required because your connector vendor shipped a defective product, at a minimum, make them give you the tool.)

I�ll assume that the VHDM you asked about is the male backpanel side, not the female daughter card side. I believe the male backpanel module has individual signal pin rows alternating with ground columns. Can�t you just remove the damaged contacts and replace them without removing the housing? If not, you should be able to individually remove all of the contacts and ground columns, then the housing and re-press another connector module.

Please don�t hesitate contacting me for more information. Best Regards Jim Zanolli

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Peterson

#20114

Connector Removal | 29 May, 2002

I'm out here on the leftcoast. Actually, our method for removal is: break down the sides, pull each pin individually. It's tedious and time consuming, but it can be accomplished with little risk of damaging the board. Customers are curious, however. I guess they expect a "reverse press-fit tool" to be used. We typically use an arbor press and a 12-ton manual electric (ASG-MEP). My next question is regarding "surface mount connectors" We have a MY19 and a Pansonic MPAV2. Due gripper-type tools work effectively to pick and place these type of connectors?

Thanks again.

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#20125

Connector Removal | 29 May, 2002

Hello Peterson,

If the contact tails protruded enough on the underside of the PCB, then you could do a "reverse" press fit. I do not believe that to be the case with the VHDM.

Placement equipment is out of my bailiwick but; Usually small SMT connectors (less than 3� long) can normally be handled by standard pick and place machines by using vacuum pick up chucks with the connectors packaged in tape and reel or tubes. This requires the connector to either have a flat horizontal surface or if not, then a �pick up pad� is inserted on the connector. Grippers are used on odd form placement machines dedicated to placing larger components, like connectors. In either case, the machine needs to be equipped with a vision placement system to ensure accurate placement of fine pitch SMT connectors.

Best Regards Jim Zanolli

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