horrors on meters!

[zumergido]

i was doing some fine setup on the mm.
cut a rectable and measure to see if there is an error. and 1mm -+, i desasemble all the pinions to check tightness and the error apears again.
for now the problem is the meter i use. i forgot about this issue.
took some pictures to show the problem.




on 800mm this meters can have more then 1mm diference. dont what to know the diference on 2 meters.

[smreish]

...when I was apprenticing long ago in a wood cabinet shop the owner said asked me if I had a tape measure. I said yes....he said "good - because when you start a project with the one in your hand - it is the only one allowed to be used...period." I only want one unit of measure to be the reference for that cabinet your about to craft.

Interesting true still and apparent in your case too.

[zumergido]

yes is what i do. i use to use the orange one.
on the mechmate that tape have a diference of some mm. only one of the metallic rullers are same that the mechmate say.

[Gerald D]

Fernando, what happens if you align the 100mm point and then look at the 900mm point? (The 0 point is often damaged and you can never trust that)

[Regnar]

I also find that metal clips on the end of tape measure wear over time. So you will loose a mm or gain a mm depending on what direction your going. Cheaper tape measure have this problem before you even take them home.

[Robert M]

For what my storry is worth !

I once had this issue with some Starrett tape vs some Starret stick-on flex tape for jigs !!
What the Starret people kindly explained to me is it is apparently “normal” and in tolerance of some % ( which I can’t remember today) , even if you eliminate the metal start clip like comparing 10mm to 100mm from one to another !
Printing on these are not “prefect” I was told……unless you buy one for that purpose…..and you gest right….not easy to find ( Special order) …..and LOTS more moola !!.....I was told back then ( +/- 2005)
My story, Best of luck Robert