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CR-10/S/Mini & Ender-5 default TMC RMS currents #15666

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thisiskeithb
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@thisiskeithb thisiskeithb commented Oct 25, 2019

Description

As a follow up to #15115, this PR adds default TMC RMS current values for the CR-10, CR-10S, CR-10 Mini and Ender-5 since stepper motors were easily identifiable online.

Steppers X Y Z E
CR-10 40mm/650mA 40mm/650mA 34mm/580mA 40mm/650mA
CR-10S 40mm/650mA 40mm/650mA 34mm/580mA 40mm/650mA
CR-10 Mini 34mm/580mA 34mm/580mA 34mm/580mA 40mm/650mA
Ender-5 34mm/580mA 40mm/650mA 34mm/580mA 40mm/650mA

Note: Stock motors are rated from the manufacturer using peak values instead of RMS (See bigtreetech/BIGTREETECH-SKR-mini-E3#22 (comment) and this gist from @knoopx), which is why these values are less than the advertised ratings of 840mA for 34mm and 1000mA for 40mm steppers.

Benefits

Easier setup of UART/SPI TMC drivers with an aftermarket mainboard on several Creality printers.

This also prevents motors from overheating due to users setting current using peak ratings instead of RMS (the motor manufacturer advertises with peak values instead of RMS) or using Marlin's default values.

Related Issues

#15115

Edit: A *666 PR number is fitting since this lowers current to prevent the steppers from getting hotter than hel- the sun.

@CristianoGorla
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The Ender 5 motors are X Z 42-34 and Y E 42-40, I think the configuration in your post is for the Ender 3.

Add default TMC RMS current values for the CR-10, CR-10S, CR-10 Mini and Ender-5.
@thisiskeithb thisiskeithb force-pushed the pr_add_creality_tmc_rms branch from a5c6673 to bfd05a0 Compare October 25, 2019 19:21
@thisiskeithb
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Ender 5 motors are X Z 42-34 and Y E 42-40

I've updated the Y motor size. Thanks!

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3 participants