diff --git a/Marlin/src/feature/digipot/digipot_mcp4018.cpp b/Marlin/src/feature/digipot/digipot_mcp4018.cpp index 37853ff428..3f2ecbfcdc 100644 --- a/Marlin/src/feature/digipot/digipot_mcp4018.cpp +++ b/Marlin/src/feature/digipot/digipot_mcp4018.cpp @@ -31,9 +31,13 @@ // Settings for the I2C based DIGIPOT (MCP4018) based on WT150 -#define DIGIPOT_A4988_Rsx 0.250 -#define DIGIPOT_A4988_Vrefmax 1.666 -#define DIGIPOT_MCP4018_MAX_VALUE 127 +#ifndef DIGIPOT_A4988_Rsx + #define DIGIPOT_A4988_Rsx 0.250 +#endif +#ifndef DIGIPOT_A4988_Vrefmax + #define DIGIPOT_A4988_Vrefmax 1.666 +#endif +#define DIGIPOT_MCP4018_MAX_VALUE 127 #define DIGIPOT_A4988_Itripmax(Vref) ((Vref) / (8.0 * DIGIPOT_A4988_Rsx))