M593 schouldnt start with 0Hz

[TylonHH]

Regarding to: https://github.com/MarlinFirmware/MarlinDocumentation/edit/master/_gcode/M593.md

I used the code for Prusa: M593 F{(layer_num < 2 ? 0 : 15 + 45.0 * (layer_num - 2) / 297)} ; Hz Input Shaping Test As I see the Freq is set to 0Hz at the layer <2. But there will be no movement with this Frequenz! Will it?

So the code should look like: M593 F{(layer_num < 2 ? 15 : 15 + 45.0 * (layer_num - 2) / 297)} ; Hz Input Shaping Test

Tell me if I'm wrong

[thisiskeithb]

That just zeroes out the damping frequency. It doesn't stop motion.