Huepar laser level calibration

[cwr]

Anyone tried to re-calibrate a Huepar laser level? 

 

Mine had a bit of a fall resulting in it being out by a couple of mm per m. Couldn't find anything on t'internet other than only the manufacturer can calibrate, and looking inside it after disassembly there is nothing terribly obvious to make fine adjustments.

 

So, feeling I'd nothing to loose I had a go with some hot glue to rebalance it, carefully applying blobs to the 'high' side. Manged to get it within 1mm at 7m, which will do well enough for what I need. 

 

Perhaps there is a proper way to do this, rather than my bodge...

 

 

[Oz07]

You'd be suprised how far they can be out and still be in spec. I tested mine in a big sports hall, one end and the other then checked the difference between the two marks. From memory it was something like maybe 18mm and checked the book and was in spec. Although 18 does sound a lot maybe it was 8 ?!

[crispy_wafer]

When i knocked mine out, i spoke to huepar about whether I could adjust it.  They asked me to send a video of me running the calibration check, they agreed it was off and sent me a new one FOC, it was within a year of buying it, but still, that surprised me.

[Thorfun]

Can someone explain how to test the calibration? Surely to measure at both ends you have to be certain what you’re measuring against is perfectly true?

[Thorfun]

8 minutes ago, Thorfun said:

Can someone explain how to test the calibration? Surely to measure at both ends you have to be certain what you’re measuring against is perfectly true?

Never mind. Found the answer. 
 

 

[Oz07]

49 minutes ago, Thorfun said:

Can someone explain how to test the calibration? Surely to measure at both ends you have to be certain what you’re measuring against is perfectly true?

I set mine up at both ends of the hall. Marked pencil lines halfway down the hall on the 2 side walls. Measure between both pencil lines. In theory the gap should be the same but I was suprised how much it differed. Read the manual and it was in spec

[Alan Ambrose]

It’s also instructive to rotate the laser in 8 x 45 degree turns and see how the horizontal line varies. You can compare that against the spec bearing in mind that the spec is usually for the diameter of the circle being traced. That gives you a real feel for the wobble in the beam.