Moving stage using udp command in qt gui

[ankit.1g@gmail.com]

Hi all,

I am new to qt, I am trying to make a gui to control my stage(based on stepper motor). it uses udp protocol to send commands. command structure is as:
header =07 ( 2 bytes)
command to move = FL10000 ( to move 1 cm)
termination <CR> = 13

I made a push button and created slot for the same shown below:

void MainWindow::on_move_1cm_clicked()
{
      QByteArray datagram;
      datagram[0] = 0;
      datagram[1] = 7;
      datagram[2] = 70;
      datagram[3] = 76;
      datagram[4] = 45;
      datagram[5] = 49;
      datagram[6] = 48;
      datagram[7] = 48;
      datagram[8] = 48;
      datagram[9] = 48;
      datagram[10] = 13;
 
      QUdpSocket udpSocket;
      udpSocket.writeDatagram(datagram, QHostAddress("10.10.10.10"),7775);

void MainWindow::on_move_1cm_clicked()
{
      QByteArray datagram;
      datagram[0] = 0;
      datagram[1] = 7;
      datagram[2] = 70;
      datagram[3] = 76;
      datagram[4] = 45;
      datagram[5] = 49;
      datagram[6] = 48;
      datagram[7] = 48;
      datagram[8] = 48;
      datagram[9] = 48;
      datagram[10] = 13;

      QUdpSocket udpSocket;
      udpSocket.writeDatagram(datagram, QHostAddress("10.10.10.10"),7775);

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The problem I am facing is on clicking the button at the first time the stage move, but doesnot when I click it again.
to make this code work again i have to power off my motor.
can anyone tell me what can be wrong.
I am planning on having 3-4 push buttons for different length of move.

Please help me out.

thanks.