bernarddt

I know this is an old article, but using a feeler gauge is a very good idea, as it is a high precision measuring device. But to achieve success you need to know how to use it. It should not be used a tool to determine the grip or resistance of the hotend pushing on it. A feeler gauge is a smooth metal tool that will not exert much or any resistance under pressure. The correct way to use it is to measure if the tool "fit or don't fit" in a gap. Thus, you need to slide the tool under the hotend, if it "slides under" it means the gap is either accurate or to big. So you adjust the gap slightly smaller, and try again, until it does not slide under anymore. Then you back out as little as you can, and test again, and repeat this until the feeler gauge slides under. Now to ensure you have to backed the hotend out more than your tolerance you need to select a slightly larger feeler gauge (if your tolerance is 5% and your gap is 100 microns, you need to select a 105 microns gauge) then if that does not "slide under" it means you have not overshot your tolerance, if it does, it means you did and you need to try and make a finer adjustment. Pro tip: To help you make small adjustments, use one hand to compress the spring that pushes against your adjustment screw. Then you can easily adjust your screw and then let go with the other hand to let the plate return to the adjusted level. PS. A feeler gauge is a cheap tool. Just buy it from any motoring supplies shop.