Differences in tension heads

#1
I've noticed that some tension heads have the part that the string is wrapped around first, and then it is placed in the portion that calmps on the string prior to pulling. I have the Alpha Axis Pro and it does not have this as compared to the Gamma Progression.

What is the benefit of wrapping the string around this piece vs. not?

From what I can tell, it provides the proper angle for the string to be inserted into the clamps so they're not being pulled at an angle.

How easily would it be to fit this into my tension head?
 
#2
The linear gripper of the Axis Pro is basically level with the mounted frame. You do not need a diabolo. Gamma's gripper is 1.5-2.0" below the mounted frame, which is why they added the diabolo. 3¢
 
#3
I've noticed that some tension heads have the part that the string is wrapped around first, and then it is placed in the portion that calmps on the string prior to pulling. I have the Alpha Axis Pro and it does not have this as compared to the Gamma Progression.

What is the benefit of wrapping the string around this piece vs. not?

From what I can tell, it provides the proper angle for the string to be inserted into the clamps so they're not being pulled at an angle.

How easily would it be to fit this into my tension head?
The string guide on a Gamma machine keeps the string at a constant angle going into the gripper plates and it insures the string is guided straight into the gripper plates. With the string going around the string guide (this is not to be confused with a diablo) because the string always goes into the gripper plates at the same angle you always have a consistent tension because the lockout always trips with the same tension on the string. With any other lockout as the angle changes the amount of tension on the string required to tilt the back of the gripper assembly could be ever so slightly different so the tension at lockout if different.

Fitting a string guide on an alpha machine would be very difficult to do right.

EDIT: Whatever you do never ever put a diablo on a lockout machine it will not work. Also the Diablo will tilt up just a little and you will lose 360 rotation if you have it.
 
#7
@letplaytennis if you try to mount a roller guide on your machine make sure the gripper assembly is not restricted when doing so and the roller turns freely. Notice in the pic below how the roller guide support arm is mounted. This will change the angle of the string going into the gripper so you will also have to recalibrate your machine. My guess is linearity will be completely messed up.
 
#10
@letplaytennis, I wouldn't put one on your machine. It is designed without a diabolo for a reason. The manufacturer accounted for the string angle from frame to tensioner already. I own a Babolat Sensor, it does not have a diabolo and doesn't need one. The design of the machine is such that the need for one is precluded.
 
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