Thread: winding bobbins

I have a terrible time winding my bobins, I have a little winding machine made by singer, but it doesn't wind evenly. So I try my sewing machine to wind them, same thing. I have the correct size bobin. Any information you can give me will be greatly appreciated.
Thank-you
Twixbar (Rhona)

This has happened to me as well. I found that I hadn't wound it around the tension disc enough to create tension, maybe this is what's going on with you. Hope this helps.

This happens all the time to me. I found that putting tension on the thread helps a lot. I put a finger on the thread before it enters the tension disc.

I have a 6600 Janome, the dealer told me to wrap the thread around the tension disc once and a half, it puts more tension on the disc and actually wraps the thread tighter on the bobbin, thus getting more thread on the bobbin,

Thank-you all for your suggestions, I will try them all.
Twixbar (Rhona)

I try to remember to hold the thread end as the bobbin starts winding...after a bit it will break off. Also was told to not wind bobbins too fast, but not sure why that is...I think something about the thread stretching.

I have a Janome 6600 and I just wind it on the wheel backwards and that seems to work for me.