The 1.7A label rating of the motor is a kind of maximum rating, and NOT the value it should run at, not even something you should aim for. Most likely should make a driver setting at 0.7-1.0 amp or around those values. And values 10x of thess, like 7A-10A are ... offcharts and impossible.
Also you can deduct the missing variable, for example if the motor label is 1.7A and 5V, then you can deduct from ohms law that the 3rd variable, the coil resistance will be 2.9 ohms. And to add to the confusion, you can note that even if the motor label says 5v, that is NOT the voltage the motor is meant to run at, either.
So, when you make a driver setting which according to driver datasheet, lets say equates to a 1.0A current, that is (read datasheet) I(peak). Note the word "peak". The driver lets the current rise in the coil, and when the current reaches a certain preset point Ipeak, driver shuts curent off. Also "peak' is NOT "average", they mean very different things. The average of current drawn by motor is who knows what, for starters its rise time shape/formula also depends on the L inductance, and fall time depends also on decay mode, but its beyond the point to make the exact average anyway, it would be a lot of work for some useless result. The point of the potentiometer setting is that when you need less, or more power you move it accordingly, thats all (the coil energy named flux depends only on current I, not v).
I wanted to point out at a few of what i think are usual misconceptions around the issue. Good luck. :)-D
Also you can deduct the missing variable, for example if the motor label is 1.7A and 5V, then you can deduct from ohms law that the 3rd variable, the coil resistance will be 2.9 ohms. And to add to the confusion, you can note that even if the motor label says 5v, that is NOT the voltage the motor is meant to run at, either.
So, when you make a driver setting which according to driver datasheet, lets say equates to a 1.0A current, that is (read datasheet) I(peak). Note the word "peak". The driver lets the current rise in the coil, and when the current reaches a certain preset point Ipeak, driver shuts curent off. Also "peak' is NOT "average", they mean very different things. The average of current drawn by motor is who knows what, for starters its rise time shape/formula also depends on the L inductance, and fall time depends also on decay mode, but its beyond the point to make the exact average anyway, it would be a lot of work for some useless result. The point of the potentiometer setting is that when you need less, or more power you move it accordingly, thats all (the coil energy named flux depends only on current I, not v).
I wanted to point out at a few of what i think are usual misconceptions around the issue. Good luck. :)-D