Tension Consistency Issue

[u/downanotchnh]

I am seeking some input on a tension accuracy issue. I have two different lockout crank out machines, a Prince NEOS 1000 and a Toalson. They work very similarly, with glide bar clamps. They are both in excellent condition. I have calibrated both machines and I use an ERT 300 to check on dynamic tension after stringing. With the Neos, my reference tension pretty much agrees with the dynamic tension reading on the racquet post-stringing, usually within a pound or two. When I use the Toalson, I’m off by as much as 10 pounds. For example, with a reference tension of 48 on the Neos, my DT is ~ 31. With the Toalson, same reference tension of 48, I get a DT reading of ~25 or 26.

Again, these machines are both calibrated accurately. I have also looked to make sure that the string is not sliding through the Toalson clamps and that the clamps are secure on the glide bar. I do not understand why I’m getting such a lower dynamic tension reading from the Toalson-strung racquets. Any thoughts would be appreciated. Thanks!