Southern Machinery

SMT & THT PCB Assembly Automation for EMS Factories

The insertion head casting height adjustment sets the distance from the
bottom of the plate under the CTA to the top of the rotary table. Failure to
correctly make this adjustment may cause interference between the CTA and
the components on the workboard.
Prerequisites:
Plate has been squared to the upper frame.
Comments:
When attempting to set the head height to the rotary table, do not change the
plate settings. The plate settings are set up at the factory and would require

Procedure:
1.Power down the machine and perform Lockout/Tagout according to local procedures.

2.Loosen the 4 mounting bolts on the head drive casting just enough to allow the casting to slide on the plate.
3.Position the positioning system so that the rotary table support bearing is under the CTA transfer plate.
4.Place the gauge block 34,37 mm (1.353 in.) next to the rear rotary table support bearing (reference point), adjust the setscrew (3/16 allen wrench) until the gauge block slides under and back out from below
the CTA transfer plate with only a slight amount of friction. Check the other side of the CTA transfer plate the same way.

5.After the correct distance has been set, retighten the four head casting bolts.

6.Recheck the setting. If the setting has shifted (become more or less than
it should be), repeat steps 1 through 4. If the setting has not changed,
apply torque seal over the set screw threads.

End of procedure.

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.

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.

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