Building of Mini Kossel 3D Printer – 17

Sense resistors S1, S2 are marked R100. I checked the resistance of the two but my multimeter was reading between 0.2 ohm and 0.3 ohm. R100 is 0.1 ohm by SMD code calculator.

A = VREF / (8 x RS)

= VREF / (8 x 0.1)

= VREF / 0.8

To set 1A current

VREF = 1.0 x 0.8 = 0.8V (800 mV)

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About janpenguin

Email: janpenguin [at] riseup [dot] net Every content on the blog is made by Free and Open Source Software in GNU/Linux.
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