QUOTE(louby @ Dec 2 2008, 01:19 PM)

Thanks AmandaL
Its been driving me mad as if I slow it down I can do it but speed it up and stubby stubby stubby
Had a lesson last night and weve had a breakthrough

Its my elbow, which tenses up, so after lots of open string bowing and then the dreaded study, getting up to Bachs speed, I was finally much better.

Yay

Breakthrough moments are the best!
I have to say, having basically learnt bow technique from scratch ("this is where you put your thumb" level) in 2 years (took around 30 minutes of open strings a day though), that while it starts off slowly and feels like too much information to process, the more different techniques you do the more things will come together and you will find that learning one technique will help another along a lot. Like once you have covered martele you can do up-bow staccato and sautille in a strange way helps legato bowing (teaches you how to bounce the bow and therefore how not to!).
If you are serious about building bow technique can I suggest that you get Casorti school of bowing technique and work through all the basic strokes with your teacher? It doesn't take much time per day but you will be amazed at how bowing will eventually no longer be an issue. For Bach A minor you might find looking at Sevcik Op 2 useful as well as it is basically just a bunch of exercises on string crossing without difficult notes or musical content so you can be 100% focussed on making a good sound with good technique.