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I am trying to make a 3D printer (Prusa i3 model). I was testing all steppers and all steppers are working, however the Mk8 extruder (direct drive) is not working and I don’t know why. Can someone help me?

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  • $\begingroup$ Mk8 just says "iteration 8", but at this time that is usually shorthand for the "Makerbot MK8" Hotend/extruder design. The Prusa i3 Mk3 swapped to the previous Makerbot Mk8 for an e3D v6 hotend some years ago. $\endgroup$
    – Trish
    Dec 6 '19 at 15:46
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    $\begingroup$ What firmware are you using? Chances are, you've forgot to disable the rather useless "cold extrusion prevention" if you're using Marlin. $\endgroup$
    – towe
    Dec 9 '19 at 8:10
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It’s either because you haven’t connected it properly or you have not mounted it the correct way. This could lead to the damaging of the part and failure to work again.

Check your connections with the stepper motors and hotend power wires. Make sure the connectors are in fine condition and cords are not frayed. Ensure all power is completely off and mains cable is unplugged.

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