Trying to publish to joint with python script

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Here is my script

#!/usr/bin/env python3
import rospy
from std_msgs.msg import String


import rospy
from std_msgs.msg import Float64

def talker():
    pub = rospy.Publisher('/rx150/wrist_rotate_controller/command', Float64, queue_size=10)
    rospy.init_node('rx150_talker', anonymous=True)
    rate = rospy.Rate(10)
    while not rospy.is_shutdown():
        position = -1.0
        rospy.loginfo(position)
        pub.publish(position)
        rate.sleep()

if __name__ == '__main__':
    try:
        talker()
    except rospy.ROSInterruptException:
        pass

When executing this script the gazebo simulated robot doesn't respond to the joint command I give.

The simulated robot however does respond to this command when I type it in the terminal:

rostopic pub -1 /rx150/wrist_angle_controller/command std_msgs/Float64 "data: -1.0"