I currently have a not so old Kenmore sewing machine that has been great, but this last weekend, I noticed it struggled as I was attempting to sew multiple layers of nylon - especially compared to how easily the machine on the youtube video I was using as a guide operated...
The video was using a Domestic/White 464R to demonstrate something so I checked out other whites and found this model has a 1.3 amp motor and can sew through multiple layers of denim, leather, etc...
Now I want to upgrade but don't know what to look for other than this model White based on what I saw. I actually found that very model locally, and they have a Necchi BU Mira or Nova (I don't know enough to tell which yet) which is supposed to have a 1.1 amp motor and can even get geared lower by adding a pully set.
A friend is a huge fan of the Pfaff 130 model and recently told me he'd be willing to assemble one from the many parts machines he's got. Looking online, I see these models outfitted with up to 1.5 amp motors, retrofitted, modified, etc... and still considered an outstanding workhorse.
This leads me to the question: What makes a good medium to heavy duty machine? Does the weight of the machine have anything to do with it? I see the output from the motor affecting the force at the needle, and maybe the RPMs the machine is capable of acheiving. I understand accessory pulleys can be added for extra oomph at the needle (at the expense of speed). What else?
Of the models I listed above, which would you guys choose and why?
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