Updated June 29, 2014; to reduce the sewing time, for all items. Thanks to LilSister's post.
July 2, 2014: Added Medium Speed which takes the Sims about an hour to complete the larger items. File name BecksSewingMachineFT-MediumSpeed.zip.
The file BecksSewingMachineFT.zip is a very fast mode.
I created this in response to a request from LilSister. The mesh is by cokenasmile and is posted here.
I have cut in half, the length of time it takes for Sims to earn the sewing badges, and the time it takes to create the items they sew.
I did make changes to the original mesh and created a recolor.
It is found under knowledge/misc for $950.
Known issues: When sewing an outfit you are not able to choose what you want to sew, it will however, create a bundle of clothing that you may sell, and places it in the Sims inventory. I did not test this in a business situation, so if you do find issues...please do let me know. All files within the zip are needed in order to make this work. There is also a separate matching chair that is found under dining chairs for $25, which pulls it's textures from the sewing machine.