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1 vote

Need very flat surface without breaking the bank

You can buy fret-levelling sander blocks that are ground flat to a thou or so long enough to cover all the frets. This is how the problem is solved if you do not have access to a CNC milling machine. ...
niels nielsen's user avatar
0 votes

Need very flat surface without breaking the bank

It depends upon how flat you want and how much variation you can accept over the distance being measured. For each extra decimal, expect to pay another 10X as much. You say 0.1 mm. For that (as ...
user1683793's user avatar
  • 1,050
2 votes

Need very flat surface without breaking the bank

Acrylic is one material (plastic, not glass), although not what I would recommend, too much flexibility. Glass is another material and is going to be suitable, especially if you can find a suitably ...
fred_dot_u's user avatar
  • 7,287
0 votes

Determine reading on gauge that doesn't have enough tick marks

Estimating at a voltage with uncertainties in the $\pm$ 0.5 V range is about the best you can expect by eye. To do better, photograph (image) the gauge straight on (perpendicular to the plane of the ...
Jeffrey J Weimer's user avatar
0 votes

Determine reading on gauge that doesn't have enough tick marks

You will have to use a digital or analogue multimeter to measure the voltage input to the gage so that you can get an accurate assessment of the gage reading. Then you can vary the voltage input to ...
Thomas Perry's user avatar

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