Technical_reference - 第53页
Technical Service Manual 53 Revision Dat e: August 2004 C - CONVEYOR CONVEYOR TYPES This Section descr ibes the three types of conveyor transpor t systems available on the Vitronics- Soltec Reflow Ovens. They are: 1) Edg…
Technical Service Manual 52 Revision Date: August 2004
BOTTOM HEATER REPLACEMENT
1. Retrieve the heater panel for this cell and lay it into place in the cell. Be careful not to bend the thermocouple wire.
Prop the heater panel up from the front to reconnect the heater wires.
2. Reconnect the wires to the panel referring to the SKETCH made when the panel and wires were removed. Use
two 11/32" wrenches to NOT break the ceramic block or tear the foil connected to the lower (closest to the panel)
nut on the stud.
3. Carefully place the thermocouple wire in its protective 1/8" vinyl tubing through the correct hole in the panel. If the
thermocouple(s) was not marked (circled) before removing the panel, then count three rows from the right and
seven holes from the front to locate the correct hole. If the Oven has the Redundant Over-temperature Sensing
Option (ROSCO), refer to the SKETCH to locate the second thermocouple.
4. Once the thermocouples are located in their proper holes, lower the heater panel in place. Remove the vinyl tubing
from the thermocouple(s).
5. Replace the front panel bracket and fasten it down with two Philips head screws. Replace the rear heater panel
bracket and fasten it down with two Philips head screws.
6. Replace the left and right ICBs and fasten them down with two Philips head screws each. Refer to the sketch of
ICB placement to adjust them.
7. Carefully bend the thermocouples into the correct places and replace the clamps and screws. Tighten the screws.
8. Reconnect the conveyor system. See the procedures for reconnecting rails and chains and reconnecting the belt.
Technical Service Manual 53 Revision Date: August 2004
C - CONVEYOR
CONVEYOR TYPES
This Section describes the three types of conveyor transport systems available on the Vitronics-Soltec Reflow Ovens.
They are:
1) Edge Rail Conveyor System,
2) Mesh Belt Conveyor System,
3) Combination Conveyor System.
The Mesh Belt conveyor system is standard on most Vitronics-Soltec Reflow Ovens. By special order, Ovens may have
only the Edge/Rail or Combination Edge Rail / Belt Conveyor System’
The description of all three follow:
EDGE / RAIL CONVEYOR SYSTEM
The edge / rail conveyor system (shown below) permits single or double sided surface mount printed circuit boards to be
processed through the oven. The standard chain conveyor carries circuit boards on 0.185 inch (4.75mm) long pins
extending from the chains. This conveyor system provides a convenient interface to other equipment in the production
line. Some Ovens have two sets of rails and chains (Dual Rail) for the processing of two PCBs at the same time.
ADJUSTMENT LEAD SCREWS
PROCESS TUNNEL
Edge Conveyor Rails
Edge / rail conveyor system.
Technical Service Manual 54 Revision Date: August 2004
MESH BELT CONVEYOR SYSTEM
The mesh belt conveyor system is used to process single sided surface mount printed circuit boards.
Mesh Belt Conveyor
COMBINATION CONVEYOR SYSTEM
The combination belt/rail conveyor has both the edge rail and the mesh belt. The mesh belt is below the edge rail
conveyors, and both conveyors are driven together. The belt conveyor is shorter than the outside edge of the machine
with the sheet metal covers on, and shorter than the end of the rails with chain guards installed.
A
pproximately 3 inches between end of
belt and end of rail conveyor (both
ends).