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Clamping & Pinning Order

shayla

WOW Framer
When you clamp and underpin frames, which do you do first?

We clamp with glue until dry, then pin. Just saw a post from someone who does the reverse.
 

Pat Murphey

SPFG, Supreme Picture Framing God
I do what you do, Shaya. It works best with my SER strap clamps. But, in dealing with some warpage issues gluing and underpinning particular corners first can help with alignment of the rest before clamping the whole frame. Max's method may work better with his Bessey clamps. I have no doubt about his craftsmanship with the rare joins that I have gotten from him. His reasonable free chop shipping minimum makes me buy chops for almost all orders.
 

munnframeworks

CGF, Certified Grumble Framer
WE underpin each corner and manipulate the joint till its perfect, after doing this to each corner we then clamp them to close any opening. this usually gives us the closest joint to closed corner finished frame.
 

shayla

WOW Framer
Thank you both for posting. Part of why I raised the question is that a truly excellent frame maker mentioned it. Just didn't want to presume, so made and anonymous reference. I love finding out the different ways framers work, and others can please feel free to share what they do.
 

framah

PFG, Picture Framing God
It only makes sense to glue them up in a vise allowing you to get them set at the same height and a tight corner edge. Once it has set up for about 15 minutes , THEN I underpin it.
 

DVieau2

PFG, Picture Framing God
I usually glue and then underpin. I like to give the joint hours to set up.
This is the way I get the best corners.

Any true production facility would underpin and glue at the same time. But then they have $20,000 saws and $10,000 underpinners and a person who might make 100+ frames per day.
 

Wilson

Grumbler
I usually glue and then underpin. I like to give the joint hours to set up.
This is the way I get the best corners.

Any true production facility would underpin and glue at the same time. But then they have $20,000 saws and $10,000 underpinners and a person who might make 100+ frames per day.
More like $10,000 saws and $20,000 underpinners, but yeah, pinning and gluing at the same time really helps the flow of work.
 
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