Preset pin not engaging on KAPEX KS 120 REB

[Klup]

Bought my Kapex last week.  When I slide my saw so that the it stops at a preset, say 0 degrees, it’s randomly off by 0.5-1 degree randomly.  It’s inconsistent where it stops.  It’s always within a degree of zero but, rarely right at zero.

I flipped it over to see how the pin engages the knotch.  It doesn’t appear to be seating securely.  I think that explains the random nature of the preset.

see photo

Does that look right?
Is there an adjustment I can make, or is better to call for service?

 

[JonBuck]

Hi, I also just bought a Kapex KS 120 a week ago and mine is exactly the same. The indents seem to be 0.5 to 1.0 degree off the scale. I have called customer services and I'm awaiting a response from an engineer.
My laser is also wrong and doesn't line up with the saw cut.
How did you get this fixed?

 

[rmhinden]

Hi, I also just bought a Kapex KS 120 a week ago and mine is exactly the same. The indents seem to be 0.5 to 1.0 degree off the scale. I have called customer services and I'm awaiting a response from an engineer.
My laser is also wrong and doesn't line up with the saw cut.
How did you get this fixed?

There are instructions in the manual on how to adjust the laser. It's also in the supplemental manual:

Kapex® KS 120 Miter Saw

I found the supplemental manual is very helpful.

Bob

 

[JonBuck]

Thanks Bob, my only concern was that the saw has come out of the factory un-checked.
The biggest issue for me was the indents not lining up with the scale. I contacted customer services and an engineer contacted me back in an hour (fantastic Festool customer services).
He told me that the saw should not be like this and advised me to have it replaced which it what I have done. New saw will be swapped next week and hopefully everything will be okay.

 

[marshman8]

Found myself chasing similar issues. Wondering why after multiple dialing in of 90 degree cuts, it kept being off. I noticed what seemed to be play in the indents. Measured all the indent notches with a digital caliper and saw no drastic variance. My conclusion is that the H shaped piece of metal that has the indent catch on it twists and rocks with some pressure in a way that nudges the catch slightly out of the indent. I double checked that the catch was screwed tight (through the access ports in the cast base). I am attaching the parts diagram (part 112) to explain what I mean by H shaped catch....its pretty thin in profile and needs act like a spring to go up and down ....just not in a twisting way. Did a video to show part 112 warping in pressure, but FOG doesn't seen to allow video uploads. I think that the only way the catch could sit further into the indent would be if the indents were all a bit wider, which would then present a sticking problem. In any case, once I get my 90 in the locked down position, I adjust the micro arrow position to be exact and make sure that when it lands in an indent, it is at that position and in corresponding 45 degree indents.