diff --git a/src/schrittmotor.py b/src/schrittmotor.py
index 0443993..80156ad 100644
--- a/src/schrittmotor.py
+++ b/src/schrittmotor.py
@@ -34,18 +34,21 @@ class motor:
 
         self.pwm1 = GPIO.PWM(sp1, freq)
         self.pwm1.start(0)
+        self.pwm1.ChangeFrequency(freq)
         self.pwm1.ChangeDutyCycle(0)
 
         self.pwm2 = GPIO.PWM(sp2, freq)
         self.pwm2.start(0)
+        self.pwm2.ChangeFrequency(freq)
         self.pwm2.ChangeDutyCycle(0)
 
         self.pwm3 = GPIO.PWM(sp3, freq)
         self.pwm3.start(0)
+        self.pwm3.ChangeFrequency(freq)
         self.pwm3.ChangeDutyCycle(0)
 
         if self.halten == 1:
-            self.pwm4 = GPIO.PWM(sp4, freq_halten)
+            self.pwm4 = GPIO.PWM(sp4, freq)
             self.pwm4.start(0)
             self.pwm4.ChangeDutyCycle(cyc_halten)
         else: