diff --git a/A4988-Stepper-Motor-Controller.md b/A4988-Stepper-Motor-Controller.md
index 3d804a57..7aa929be 100644
--- a/A4988-Stepper-Motor-Controller.md
+++ b/A4988-Stepper-Motor-Controller.md
@@ -28,7 +28,9 @@ There are six corresponding GPIO [components](Components) for this Tasmota drive
 The minimal configuration for the A4988 are the `DIR` and `STEP` signals. In such a configuration the motor will be permanently powered and microstepping will be set to 1/1 (full steps).  
 
 ## Operation
-Refer to the [Stepper Motor Commands](Commands#Stepper-Motors)
+Refer to the [Stepper Motor Commands](Commands#Stepper-Motors)  
+
+`MotorRPM` is an imprecise setting due to the implementation method. Also, if the value is too high for the combination of chosen micro stepping increment (`MotorMIS`) and the number of steps the given motor needs for one revolution (`MotorSPR`), the motor will not turn but make a whining noise. You will have to experiment some to find the optimal combination for your use case.
 
 ## Use cases  
 The cheap auto-feeder for my cats broke. It was a fancy plastic-thingy with voice-recording-function & programmable to feed several times a day after playing back your voice (cats don't give a sh$7 for your voice - they come when they hear the food falling into the bowl). It was never precise - a concern for the amount of nutrition it gave the cats. And it was not reliable, as the torque of the internal moving mechanism was insufficient to spin the separator/proportioning wheel through the food reliably. In addition, the batteries were always drained in a day meaning very grumpy cats when we returned!