I went to the Yahoo Japanese machine group, signed up and promptly got lost. Couldn't navigate or find anything at all. I've never been back.
This foot controller is an Alpha Sew unit sold by Sew-Classic. I've bought several in the last for or so months and this is the first one to get hot like this.
I don't know if it has any adjustments but I'll pop it open and look.
I sent an email to Sew-Classics about it so we'll see what she says about it.
Joe