This one is from the Main Forum on ATW...
"Does anyone with the 4000D run at full speed? Just wondering, as so far I usually set to 600 and I'm curious." -- RosieH
And some answers...
"I usually run it full out unless I am doing something dense like lace, then I slow it down. My repair technicain said that it should be fine running at full speed. It will speed up and slow down as the machine tells it that it needs to. Good Luck!" -- Holly
"I run my 4000D at all 3 speeds. It depends what I am embroidering. When I do lace I run it slow. If I know I have serveal minutes of one color I run it at 1000. If I am doing lettering I usually go with the 600. I guess it is what your comfortable with and experience."" -- Susan
"I run mine at full speed unless I am working on a questionable design or delicate like lace which I really don't do much and if I am actually sewing, I slow things down." -- Cari
"I used to run mine at full speed and then had some problems with the machine and since then have just run it at the slower speeds." -- Sikart
"I ran my full speed when I first got it and then had problems with the machine. My dealer told me to not run it so fast. I was thinking, then why did you use that as a selling point when I bought it. Don't take advice from me as I got a lemon and am not happy with the Innovis." -- Charlotte