Hi all
I recently purchased a TKS80 as I am replacing many of my older tools and was so excited about buying this system.
Spent the first two lockdowns toying with the idea!

Anyway I note that when I am ripping a piece of timber, it is becoming very tight between the blade and the guide stop.
Forgive me if I am not using the correct name for this as I note it is called several items in the manual.
From Rip Saw Fence to
The part number is LA-TKS 80 Stopper.
It is the fence that runs parallel to the blade on the right hand side.

It would appear that it isn't running truly parallel to the blade, so the riving knife is pushed over.
I was hoping there was some adjustment at the far end of the Stopper however this doesn't seem to be the case.

Has anyone else had any experience of this?
And hopefully a solution.

Clamping Piece

Does Festool make items like Mafell has to clamp rails and such down?

It sounds like this is the same case with other saws where the blade is skewed from the fence, and the close point is only at the leading edge of the blade.  I think the CMS insert for the T55 was the same. 

If you are getting binding, maybe you need the fence on the other side of the blade.

@The Otters
Be sure to do as Tony Shop says. The large round knob straighten the fence, the lever to the right locks the rear of the fence. It is vital to do in the right sequence. When both are locked it’s dead steady.

Measure after doing it in the right sequence, then check if the fence is parallel to the blade (preferably less than half a Millimeter toe out in the far end)
The TKS 80 also has a non conductive piece glued to the aluminium sliding fence extrusion I’ve seen some with this glued on wrongly from the factory, so that the fence won’t stay square to the table, because the non conductive piece lever the whole fence. 

After checking this ^ the fence can be calibrated by loosening the (four) Allen bolts under the moulded “square” where the large knob sits. (At least it’s this way on the other LA fences for CS50 and CS70) You may need to loosen the plastic end cap of the fence itself to reach the nuts inside the fence. Loosen all four, then slightly tighten two bolts diagonally, be sure that the fence can be positioned without being too loose when you measure and calibrate. Then tighten the bolts, begin with the two diagonally, then cross tighten all four.

EDIT: Be sure to calibrate without the rear lever lock engaged, lock only the large knob. The rear lock is just a slave and do not correct the fence in any other way than clamping it to the rear. So always lock the large knob with the rear locking lever fully open.

The fine adjustment system is just garbage!

Exactly, I took it out of mine. Totally unneeded and it only makes things difficult.

By the way, you have a funny autocorrect thing going on there. 

For posterity - I came across the following blog post from 2016 (written in German) which includes photos and brief instructions for how to dial-in (a.k.a. improve the accuracy of) the rip fence (a.k.a. "stopper") for the CS 70 [scroll down the page until you find the section that deals with this topic].

https://www.holzundleim.de/2016/10/hilfreiche-tipps-fuer-die-festool-cs-70/

Here's the English translated version of the above blog post.

Since the design for the CS 70 rip fence hasn't changed (and since it's the still the basis for the rip fence that's currently available for the CMS, for the TKS 80 and for the CS 50 (Note - the CS 70 version is also compatible with the MFT/3) I thought I'd post the link to the blog post to aid folk's understanding of the process.

I also took the liberty of amending the title of this thread to make it easier for inquiring minds to find this guidance in the future.

Enjoy!