Electronic machines

[steeljack]

Which are the advantages and disadvantages of linear pulling and rotational pulling on electronic machine??
Thanks

[David Pavlich]

At least in my case, the Sensor head pulls quickly for one. I also own a Silent Partner Aria and find at its highest speed setting, I can activate the tension head on it and before it's finished tensioning, I can release the clamps. Not so with the Sensor.

Another negative, albeit a small one, is the rotary head on the Aria is square, so it leave a mild kink in poly. On a split drum like the SP E stringer DG (I used to own one of them), you get a more severe kink because of the edge of the drum.

Some say there's less friction at the grommet with a straight pull machine, but that's more a function of the angle of the string from the grommet to the tension head than it is because it's a straight pull or rotary pull.

Some straight pull heads (Babolat) actually rise up before pulling except when located under the racquet handle. This reduces the friction between the string and the grommet even further. BUT... and that's a big but, these machines are VERY EXPENSIVE. The jump in price from the Babolat Sensor to the Sensor Expert, which has the rising head, among other things is about $3500 American. And the reliability of the Expert isn't the best.

David

[Gaines Hillix]

Which are the advantages and disadvantages of linear pulling and rotational pulling on electronic machine??
Thanks

It also takes more string on any machine with a normal rotating tension head(the SP Aria is the exception). With a linear string gripper one can usually even get away with it when the last bit of string won't completely reach across the entire gripper. With a normal rotating head the string has to be wrapped around the drum at least once and then into the jaws of the gripper.