Page 8 - Fall 2023 EDM Today

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HS-Rib Capabilities
The HS-Rib Z-axis also provides greater overall
capability as there are no amperage limitations,
One of the most challenging features to cut is
and the maximum speed capability of the HS-Rib
deep, narrow ribs. The high-speed Z-axis developed
Z-axis can be utilized with electrodes weighing
by Makino, called HS-Rib, achieves a 20 meter-
up to 11 lbs. (5kg). In operation, the HS-Rib design
per-minute jump speed with a 1.5G acceleration
can reduce rough machining time of rib details
rate using liquid cooled ball screw construction.
This combination of jump speed and acceleration
is also boosted by generator technology and
provides greater machining performance and
orbiting methods.
capability – see Figure 7. The higher acceleration by up to 65%. This improvement in performance
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Updated generator settings provide extremely low
speed provides faster roughing speeds of small
electrode wear, and a unique orbiting method for rib
electrode details, as it is the increased acceleration
machining provides a consistent side wall surface
rate that pulls the debris away from the spark
fi nish over the entire length of the rib detail to
gap during the jump cycle. This creates a
improve part accuracy and quality.
cleaner machining environment which improves
machining speed.
As a result of the faster jump speeds and greater
acceleration of Makino’s HS-Rib technology, it is
acceleration of Makino’s HS-Rib technology, it is
necessary to manage the heat that is created to
necessary to manage the heat that is created to
maintain accuracy. A liquid-cooled Z-axis structure
maintain accuracy. A liquid-cooled Z-axis structure
helps maintain thermal stability for repeatable high
helps maintain thermal stability for repeatable high
accuracy. The third generation Version C EDAF
accuracy. The third generation Version C EDAF
Series machines incorporate a heat exchanger
Series machines incorporate a heat exchanger
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circulating cooling oil to the Z-axis structure for
circulating cooling oil to the Z-axis structure for
effi cient dissipation of heat – see Figure 8.
effi cient dissipation of heat – see Figure 8.

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Figure 8 EDAF Thermal Control System
This includes a core-cooled ball screw to maintain
This includes a core-cooled ball screw to maintain
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precise depth control. The new heat exchanger con-
precise depth control. The new heat exchanger con-
fi guration allows the machine to achieve high accu-
fi guration allows the machine to achieve high accu-
racy thermal stability during continuous machining.
racy thermal stability during continuous machining.
Figure 7
EDAF Head with Liquid Cooled Ball Screw

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