@deckingman said in Steppers PID - NOT heaters PID:
Belt stretch on a 3D printer? Nah - doesn't happen with timing belts from a reputable source.
exactly my point "reputable source"
reputable:
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ender 5
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noname aliexpress "double price" (marked as high quality) pack for corexy
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wanhao i3
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as you can see there's nothing in the e5 belt for e.g.
the wanhao i3 belt have "something" as reinforcement, that "something" is not glass/kevlar as when you clean the rubber and get to it you find it's syntetic rope hence the stretching
just do a simple test take 1.2m of the belt stretch it over 100cm board, put a pulley at the end, get belt over it and on that 20cm connect a scale. then link the belt around the pulley to indiator and null it, load the scale slowly and measure how much the belt stretch for each weight you add .. do that for few different PRC belts and do it with gates (unitta) or any other brand name and compare results ... I did .. 10kg on gates and my 0.001mm indicator did not move .. these "syntetic rope" reinforced ones and it starts moving after 100g 😞
extract the reinforcement from generic belt
e1a6d900-c473-487b-8086-7fce7adebf1a-image.png
you will see it's not glass, it's standard syntetic rope