I’ve pulled my machine apart with the stock steppers, so has Ryan. I ran my mpcnc when it was 5 foot square for about 20 hours straight, no issues with heat. It drilled tens of thousand holes, so a crapton of up and down motion on the z. Was running the dewalt 660 at the time. The only issue with heat for that run I had was for my dust collector. The chip bucket got warm enough to collapse under the vacuum.
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