Need Help AlumiGraphics® GRIP - Substrate Advance Issue

I need help please.

This 53" foil based substrate prints well for ~2 linear feet until fuzziness starts happening because the advance is going out of wack. I always re-calibrate the OMAS before a job, and it starts crisp, but always seems to lose itself after a few feet into a job. It's like the sensor quits working after 2 feet.

The take up reel is set for maximum tension (i.e. Both counterweights off.. I was told this helps with preventing slippage).

The Substrate advance calibration chart (printed 3x back to back) is all over the place too, not sure any value is consistent so manual advance seems out of reach.
Chart photo: https://imgur.com/Ss5N4fi

Anyone have thoughts, recommendations? This substrate is really expensive

Printer: HP Latex 315, using Flexi Production Manger 19.

 

Jay Grooms I don't think so. Iv'e had success with this substrate/printer before.

Update:
Making the Take-up reel lighter seems to be helping for the meantime! Fingers crossed that this was the issue.