Southern Machinery provides professional SMT peripheral equipment
Manual Board Handling Options Workboard Holders
Manual Board Handling Options Workboard Holders
Workboard holders hold the PCBs for the machine to perform work. Workboard holders hold the PCBs in a position that is oriented, and allow for quick removal of the PCBs. The workboard holders allow from one window up to four windows. More windows in the workboard holders enable faster machine operation by reducing transfer time. For a single-board workboard holder, the machine rotates the board into the assembly area, begins operation, and then rotates the board out when work is complete. While the board is being reloaded, the machine stops while waiting for a new board. Throughput improvements can be achieved by utilizing to a two-window workboard holder. With a two- window workboard holder, while one window is in the assembly area, the other window is available to be unloaded and re-loaded. Therefore, the machine idle time is limited to the time required to rotate the workboard holder under the assembly head. This rotation takes one second. The throughput gain can be further improved by implementing a four-window workboard holder that requires only a 90-degree rotation by the table to get a new board under the work zone. This reduces the transfer time down to a half second.
Radial CTA Procedures and Adjustments
The following procedures provide setup and adjustment information for the
Component Transfer Assembly (CTA). In order to prevent interaction
between the adjustments, these procedures must be completed in the order
presented. Refer to the illustration for the special tools that are required to
perform the CTA setup and adjustment procedures.
T
Radial Feeder Procedures and Adjustments
Adjustments and maintenance procedures required to ensure the machine
operates efficiently are presented in the following subsections of this
document. These are:
– Feeder
– Low Parts Warning
– Component Lead Conditioner
Insertion Mount (IM) Safety Rules
The following rules are specific to IM equipment (also known as Through
Hole) :
• Whenever powering the IM machine down for maintenance, follow
the next two procedures:
• On the AC power panel, push the breakers to the OFF
position. Also, at the AC power panel, turn the key to the
OFF position and remove.
• Attach a warning notice to the AC power panel showing the
machine is not operational and only the maintenance
technician is authorized to restore power.
• Disable the Full Command function to prevent machine operation
from a Host controller or UCT. This must be done if a maintenance
procedure requires machine power.
• Only qualified maintenance technicians are to use the Interlock
Bypass key switch to bypass the IM safety interlock circuits.
• Interlock Bypass: Never leave the Interlock Bypass key in the On
position except during maintenance. During non-maintenance
operations, the key switch must be in the Off Remove position with
the key removed to a secure area.
Head Drive Home Pulse Setup Procedure
The following procedure explains how to set up the head drive home pulse
with respect to the vertical and theta axes and the limit position.
Prerequisites:
Timing belts are removed
Tools:
MTR Home Pulse Setup Fixture
Comments:
This procedure is only used when setting the machine up at the factory or
when replacing the timing belt or motor in the field. Timing belts are to be
inspected on an annual basis.
This process is written for the use of both the manufacturing factory (place of
origin) technician performing the adjustment on the bench and the field
technician performing the adjustment at the customer's site.
The goal of this procedure is to position the head vertical at its negative limit
and the head theta at a point between its positive and negative limit
establishing the optima home pulse location, relevant to these limits.
Failure to properly perform this setup results in the machine not zeroing
properly.
Procedure:
1.Power down the machine and perform Lockout/Tagout according to local procedures.
2.Insert the setup fixture so it positions the head to the negative vertical
limit, and the head theta between its positive and negative limit.
3.Loosen the 4 motor mounting bolts and slide the motor up against the
tension spring. Hold it in position and retighten two of the bolts.
4.Slip the belt off the pulleys. Rotate the head theta motor shaft so that
the mark on the top of the shaft lines up with cables exiting the motor
housing, then rotate the shaft clockwise approximately 20 degrees
further.
5.Attach the belt to the pulleys while holding the motor shaft in
position.
6.Loosen the head theta motor mounting screws to allow the tension
spring to slide the motor into position. Retighten the motor mounting
screws.
7.Loosen the head vertical motor mounting screws and slide the motor up
against the tension spring using the jacking screw.
8.Rotate the head vertical motor shaft so the mark (or keyway, if no mark
exists) on top of the shaft lines up between case mounted connectors of
motor housing.
9.Attach the belt to the pulley while holding the motor shaft in position.
10.Loosen the head vertical motor mounting screws to allow tension
spring to slide the motor into position. Retighten the motor mounting
screws .
11.Remove the setup tool.
End of procedure
