CFM chuck123wapati Posted June 15, 2023 CFM Report Posted June 15, 2023 a foot pedal tied to the handle to pull it down, a spring mounted above the handle to pull it back up, very simple. or if you want to get fancy a concentric cam mounted on the handle shaft you could then put your spring below it by the pedal. push the pedal down it pulls the lever down take you foot off the spring pulls it back up. Quote Worked in a prison for 30 years if I aint shiny every time I comment its no big deal, I just don't wave pompoms. “I won’t be wronged, I won’t be insulted, and I won’t be laid a hand on. I don’t do these things to other people, and I require the same from them.” THE DUKE!
CFM chuck123wapati Posted June 15, 2023 CFM Report Posted June 15, 2023 1 minute ago, chuck123wapati said: a foot pedal tied to the handle to pull it down, a spring mounted above the handle to pull it back up, very simple. or if you want to get fancy a concentric cam mounted on the handle shaft you could then put your spring below it by the pedal. push the pedal down it pulls the lever down take you foot off the spring pulls it back up. a round gear would even work like a bicycle chain and gear Quote Worked in a prison for 30 years if I aint shiny every time I comment its no big deal, I just don't wave pompoms. “I won’t be wronged, I won’t be insulted, and I won’t be laid a hand on. I don’t do these things to other people, and I require the same from them.” THE DUKE!
Members Dwight Posted June 15, 2023 Members Report Posted June 15, 2023 After operating a Boss for 20+ years . . . I can tell you that the pedal and circle . . . or pedal and spring will be a total waste of time. The handle pulls down well over 90 degrees from top to bottom . . . and it is a full 15 to 16 inch stroke that it has to travel True . . . one can shorten the handle . . . but that lever length was put there for a reason . . . that being having a "tough" sewing project . . . where the leverage is needed. A singer sewing machine treadle will not produce the required strength . . . having only about 4 inches of bottom pedal to use . . . unless the Boss is used for sewing thin and easy to sew stuff. The required air over oil hydraulic system is only about 125 bucks off of Ebay . . . if anyone is interested . . . shoot me a PM . . . I'll get you some kind of drawing and list of materials. May God bless, Dwight Quote If you can breathe, . . . thank God. If you can read, . . . thank a teacher. If you are reading this in English, . . . thank a veteran. www.dwightsgunleather.com
Members Hymat Posted June 15, 2023 Author Members Report Posted June 15, 2023 On 6/13/2023 at 12:59 PM, Dwight said: If I was going to attempt it . . . I would do a simple hydraulic cylinder to pull the lever down . . . and a spring to return it back to the top. Actually it would be an "air over oil" cylinder . . . the foot pedal would control the air supply . . . that forcing the oil into the hydraulic cylinder . . . Using an air cylinder by itself might work in most situations . . . the problem is air collects against pressure and when it overcomes the pressure . . . the speed is unpredictable. You get rid of that by using air over oil. Best wishes on the project. May God bless, Dwight I’m thinking more of manual like old treadle type machines. I have an idea of removing the operating handle and pressure foot handle and installing a “bar” with linkage down to the old singer base foot pedal. I’ll have to see if there is enough travel in pedal to move the “bar” up and down enough. thanks and may God bless you as well!! Quote
Members Hymat Posted June 15, 2023 Author Members Report Posted June 15, 2023 Thanks for all the input! If I’m able to make something work I’ll post it for sure. Quote
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