From 6fc4dbbbc4b3b1e6820f4f18b81602451bb1786c Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Sat, 28 May 2022 17:05:09 -0500
Subject: [PATCH] =?UTF-8?q?=F0=9F=9A=B8=20Change=20M201=20G=20to=20S?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Marlin/src/gcode/config/M200-M205.cpp | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/Marlin/src/gcode/config/M200-M205.cpp b/Marlin/src/gcode/config/M200-M205.cpp
index 77cd5f7855..08b50b9680 100644
--- a/Marlin/src/gcode/config/M200-M205.cpp
+++ b/Marlin/src/gcode/config/M200-M205.cpp
@@ -108,12 +108,21 @@
 #endif // !NO_VOLUMETRICS
 
 /**
- * M201: Set max acceleration in units/s^2 for print moves (M201 X1000 Y1000)
+ * M201: Set max acceleration in units/s^2 for print moves.
  *
- *       With multiple extruders use T to specify which one.
+ *  X<accel> : Max Acceleration for X
+ *  Y<accel> : Max Acceleration for Y
+ *  Z<accel> : Max Acceleration for Z
+ *       ... : etc
+ *  E<accel> : Max Acceleration for Extruder
+ *  T<index> : Extruder index to set
+ *
+ * With XY_FREQUENCY_LIMIT:
+ *  F<Hz>      : Frequency limit for XY...IJKUVW
+ *  S<percent> : Speed factor percentage.
  */
 void GcodeSuite::M201() {
-  if (!parser.seen("T" LOGICAL_AXES_STRING))
+  if (!parser.seen("T" LOGICAL_AXES_STRING TERN_(XY_FREQUENCY_LIMIT, "FS")))
     return M201_report();
 
   const int8_t target_extruder = get_target_extruder_from_command();
@@ -121,7 +130,7 @@ void GcodeSuite::M201() {
 
   #ifdef XY_FREQUENCY_LIMIT
     if (parser.seenval('F')) planner.set_frequency_limit(parser.value_byte());
-    if (parser.seenval('G')) planner.xy_freq_min_speed_factor = constrain(parser.value_float(), 1, 100) / 100;
+    if (parser.seenval('S')) planner.xy_freq_min_speed_factor = constrain(parser.value_float(), 1, 100) / 100;
   #endif
 
   LOOP_LOGICAL_AXES(i) {