Ivoclar Vivadent EP 3000 - Manual

Programat ® FURNACE UPDATE
©2012 Ivoclar Vivadent, Inc.
Rev. 1 6/2012
EP 3000 & EP 5000 Models
Guidelines to Optimized Pressing
Do I need a dedicated circuit for my
Programat Furnace?
Yes! The EP 3000 & EP 5000 models are designed to perform
optimally with standard voltage input. Fluctuations in voltage
and draw from other equipment can alter the furnace’s performance.
How often do I need to
calibrate my furnace?
We recommend calibrating your
furnace every 50 Press cycles.
Which software version is installed on
my furnace?
To ensure optimal performance, the latest software version
should be utilized. All software downloads can be found
by visiting the Download Center online at ivoclarvivadent.com
What should the length
of my sprue be?
The proper length for a sprue is 3-8mm.
Sprues should be attached thick-to-thin
to ensure proper flow direction and the
combined length of the wax-up and sprue should not exceed 16mm.
Why are the wax
patterns placed on the
sprue base at a 45-60°
angle?
Restorations should be sprued at 45-60°
so they sit in the ‘hot zone’ of the ring.
The IPS e.max Sprue Guide should be
used to verify proper sprue positioning.
Note: Spruing with the margins up helps
to move the pattern outward into a more uniform heat zone
and adds the benefit of easier investing. Also, for full contour
restorations, it can be advantageous to place the margins up to
ensure material does not have to flow back to the center of the
ring as material fills the occlusal morphology.
Which investment material
should I be using?
Press parameters in Programat furnaces
are developed for processing in PressVEST
or PressVEST Speed investment. Some
investments are higher in density and therefore, do not transfer heat
in the same manner. The basic rule: The higher the density, the lower
the temperature in the center of the ring. Also, be sure to adhere
to the proper mixing/setting times and burnout schedule. For
predictable press results the PressVest investment is recommended.
Should I use an Alox plunger
or a disposable plunger?
Press parameters in Programat furnaces are
developed using Alox plungers. If disposable plungers are used, the
temperature profile in the ring may be altered due to their lower
density. Additionally, the dimensions of after-market plungers from
other manufacturers can vary, leading to loose or tight fit in the
investment mold. The most predictable results are achieved using
an Alox plunger that has been treated with the plunger separator.
What is the maximum time that should
elapse between taking the ring out of the
burnout oven and loading it into the press
furnace?
The ring should be inserted into the press furnace as quickly as
possible to avoid significant cooling of the investment. This step
should take a maximum of 30 seconds. If your burnout oven is in
a different room than the press furnace, for example, your ring is
losing too much heat and could result in a short pressing.
Does burnout furnace calibration affect
the press result?
The pressing parameters have been set based upon a known
starting temperature from the burnout oven of 1562° F (850° C).
Any deviation in this starting temperature can affect the pressing
result. Possible defects include excessive reaction layer, short
pressings, and optical changes to the shade or translucency.
For additional information,
please see Instructions for Use.
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