Hi I repair these machines in the pittsburgh pa area. Your problem is common and easily fixed.:)
Begin by trying to slide the film in the machine that on the rod (manderll) as far left as possible. Tighten the right hand side knobs screws tightly.
then grab the film and push everything to the right which should free the right hand side of the mandrell, so the film can be removed.
once you remove the old film be sure to put the right hand side knob screws in the indentations in the bar, tighten the screws then put on new film.
Its hard to describe by typing it feel free to call me, I will help you on the phone.
If you within 75 miles or so of pittsburgh I will come to you, show you this at no charge. I still give free estimates:)
bob haller service and sales 412 366 4906, October 2014
