This question is for players who plays on sport conditions or in a lot of differents patterns when u know that hard and straight with a plastic ball i salmost a must
how many throwns to the 10,6,3,7,4,2pins do u need to be just like a robot every time u have a single or a makeable multi pin spare?

It takes a long time I think.  Anytime your game can get a little something different which can cause your spare game to hit he dumps.  I shoot spares about twice a week, and still am not totally satisfied.  It is something that takes so much dedication and to put time into it is very hard, because it isn't the funnest thing ever.  Luckily where I bowl we can set up any pin in the deck for spare shooting so practicing any combination can be done easily.
I would say the biggest thing for spares is getting your pushaway in the right spot every time and having consistent speed.
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I am having difficulty understanding your question. But I shot as straight as possible to all spares that dont have sleeper combinations. And in fact, I shoot over the same target for all spares.. 5th arrow. I break my wrist back to eliminate revs, I throw the ball into the lane and loose it at my ankle on purpose. Its about proper hip and should alignment with my pushaway and armswing following the path of the target. If I do these things I will make every spare. Its that simple. This point I tell others.. is that you litterally have about 10 boards at the pins to hit it. That equates to 3 boards at the arrows. As long as I use proper mechaincs (hip/shoulder alignement) I cant miss my target enough to miss the spare.
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thanks for all the answers ,yes onlybowling what i wanted to know is how many throws to make a muscle memory to throw all the spares straight with plastic...the thing is that i bowl pretty much on sport conditions and i have a very high average and when i finish my set of 6 games i realize that i have maybe five or six opens and that is about 10 pins average...i only throw with plastic my six and ten pin and with my strike release the 7 and the 4 and i want to make everything straight because i am thinking to put my game on another level and like mika koiviniemi said "pros dont miss spares"
again sory for my english i am an international player from argentina so i can speak english like spanish but when it comes to write i have a little bit of trouble