How to Join Frame Mouldings with Alfamacchine U400 Underpinner

[@freehee2]

Does it stack the V nails easily with hardwood?

[@LIONPFSLtd]

Hi, yes it does when using hardwood V nails. However, if the wood is exceptionally hard (such as walnut) then the material needs to be removed. We recommend using the Hoffmann Frame Joiner to do this.

[@CarlaBates-zb4gp]

I purchased the U400 and have found it to be inferior in the joining process. The interchangeable cartridges, and double insert of wedges are a wonderful feature. However, the clamp doesn't strongly hold the moulding together and EVERY corner needs to put in a vise.

[@LIONPFSLtd]

We'd very much recommend getting in touch with the company that supplied you with the machine for advice on how to adjust the settings - what you're describing definitely isn't our experience

[@freehee2]

What’s the difference between u400s?

[@LIONPFSLtd]

Hi, the main differences are that the U400 uses interchangeable cartridges, U400S does not. The U400 joins wider mouldings and you can switch between left and right hander operation with the U400. There's also a height adjustable stand on the U400.