Question about NewCon Optik LRB 20,000 A Laser Rangefinder

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I have LRB20000 .It gives wrong measures and the measures are different values even when we aim at the same target .Some times the indicator gives zero reading .There is no stimulation tone when pressing measure. thanks alot

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I overheated my Makita 9557PB angle grinder. I replaced the brushes. Bearings seem ok: the motor assembly turns freely, smoothly, and quietly. The running motor is slow, with a loud "grinding" sound.


Measure the value difference in Ohm between the carbon brushes on the armature there are some collectors in the commutator give an other ohm value if compared to other collectors in the comutator of the armature . if measure turn the blad very slow so the collectros can be positioned to measure the ohm difference. range to measure 0-200ohm on ohmmeter.
If only one brush made trouble ( much more sparking ) then the electric field is not in ohm value balance, control always if there are slide contacts used they are solid. on the field. Measure the difference. between the 2 field coils of the electric field . if its also different replace allways the field and the armature if thats also have problems (BUT DON,T FORGET to order a new drive gear for the armature and new brushes. !!!

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1 Answer

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The problem is the "tolerance" of the electronic components that go into all electronic devices - your turntables included. Take a simple resistor. Buy 2 (or even 2 dozen) of the same value and measure them with the same meter. I bet you'll see to different values displayed. Next, use a different meter to measure the same resistors - I bet they display yet different values. You can do the same thing with 2 transistors, capacitors - you name it. It's not limited to just electronics, either.

Manufacturing processes have not managed to hit the 100% predictability mark yet. As a result, no two parts produced are exactly the same. No two loads of raw materials are the same - so it is going to be practically impossible for the finished output to be the same. Sure, they've come close - but I doubt we'll ever see the kind of similarity between supposed "identical" devices that you're looking to find.

You may find that "sweet spot" of pitch on 2, 3 or even 50 turntables where they play exactly in sync, but the indicator dials will not be in the same exact spot.

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1 Answer

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You will then need to move to at least to the next larger number up until you get a number reading.
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