Screen printing apparatus with stroke control

In a screen printer for printing on a substrate through a printing screen, the combination comprising:

• a printing head;
• a screen frame assembly having a printing screen mounted on the printing head;
• a squeegee mounted on the printing head for relative movement with respect to the printing screen during a printing operation;
• an electric servo motor of the print head -causing relative movement between the squeegee and the screen during a printing stroke;
• an electrically programmable controller for controlling the servo motor to cause a print stroke having a starting point, an ending point and a velocity of movement between the starting and ending points;
• and
• programming apparatus at the print head for programming the programmable controller to establish the start point, the end point and the velocity between the start and end points.

In a screen printing apparatus, the combination comprising:

• a printing frame;
• a plurality of printing heads on the printing frame;
• a plurality of controllers at the printing heads for controlling a plurality of parameters;
• the controllers comprising a supporting housing;
• a plurality of switches on the supporting housing for operation by the user;
• the switches bearing indicia designating the function of printing head associated with the respective switches;
• up arrows on one side of the switch to indicate an increase in value for the print head function when operated;
• down arrows on the other side of the switch to indicate a decrease in value for the print head function when operated;
• and
• a display panel to display on the housing for showing the value being increased or decreased.