Product category:
PCB Assembly Equipment and Tools
News Release from: Dima SMT Systems NL | Subject: Breeze
Edited by the Electronicstalk Editorial
Team on 02 June 2005
Reflow oven is cost effective for low
volumes
A new lead free full convection reflow oven targets the needs of companies that only have a single PCB or a small batch of PCBs that need to be reflow soldered.
The Breeze is the latest lead free full convection reflow oven from Dima SMT Systems For those companies that only have a single PCB or a small batch of PCBs that need to be reflow soldered, a huge reflow oven is too big an investment
This article was originally published on Electronicstalk on 6 Mar 2006 at 8.00am (UK)
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The Breeze is a lead free approved 4+4 zone reflow oven with a total process length no longer than 1200mm.
But the success of a reflow oven is not measured in its size or the number of heating zones, it is determined by the ability to create every possible reflow profile.
A simple calculation will help to explain what is needed.
Further reading
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New from Dima SMT Systems, the HS-100 is a semi-automatic stencil printer with an optional under-stencil cleaning unit.
For most lead free reflow profiles the board needs about three to five minutes in the process chambers.
For those companies that produce only a few boards the speed of the conveyor is of no big importance.
Therefore if the oven runs at 20cm per minute a tunnel length of maximum 100cm (5 x 20) is required.
The number of zones is a similar story.
High throughput ovens use many zones; but in practice several zones are set at the same temperature.
Dividing one long zone into several smaller zones makes it easier to keep the temperature uniform over a longer distance.
In theory only three zones plus one cooling zone are required (ramp-soak-peak); but in practice it is easier to create an ideal profile when adding one extra zone.
Dima's Breeze offers a powerful convection heating irrespective of the size and mass of the components.
The unlimited variation of temperature profiles is achieved by the tunnel design that includes four top heating and four bottom heating zones.
To minimise the stress for double sided boards the top and bottom temperature can be set independently.
The total process length has been kept to only 1200mm including one cooling zone.
To eliminate the possibility of damage caused by static, the Breeze includes an air ioniser in the cool down zone as standard equipment.
The Breeze reflow oven offers full forced hot air heating to maintain consistent edge-to-edge temperatures, regardless of component size or density.
The microprocessor controlled Breeze can be used inline, or stand alone by using a vibration free mesh belt conveyor.
The Breeze comes as a table top model or as a stand-alone unit when combined with the optional cabinet.
The mesh belt accommodates PCBs to a maximum width of 400mm.
The belt speed of the Breeze is adjustable from 50 to 800mm/min.
The Breeze is equipped with a DimaSoft reflow profiler that is capable to store up to six different reflow profiles.
Up to 99 different heating programs can be stored in the Breeze's onboard microprocessor.
Through the RS232 interface an optional PC with Windows based oven manager software can be connected providing unlimited storage capacity for profiles and programs.
The Breeze provides a power capacity of 8700W while its power consumption stays limited.
Unlike the large reflow ovens the Breeze comes with an integrated self-supporting exhaust system.
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