New EDM Technologies – Unique Sodick's Solutions
But the EDM process is slow.
What are the advantages of linear motors compared to traditional ball-screws,
if speed in EDM process is not necessary?
Sodick Flat Linear Motors are demonstrating reliability and longevity –
fully proved by over 20 years of successful operation, highest dynamic precision, high power and thrust (core EM coils), perfect heat sink and extra rigid structure with unalterably constant gap = 0.4 mm;
Shaft (cylinder) motors suffer of thrust deficit (ЕМ coil are coreless!), heat sink problems, multidirectional runouts of the magnetic shaft, dynamic asymmetry of the gap, flimsy design.
Any Sodick linear servo drive with a flat linear motor is designed individually for the part of the machine that this drive must move in the machine.
A Sodick linear machine tools and linear servo drives with planar linear motors are always a unified mechatronic system.
On the one hand, EDMing is a thermal process.
On the other hand, EDMing is аn electrical process.
Therefore the ideal materials for the EDM work zone are merely and nothing but robust electrical insulators with very low thermal expansion.
Hand Scraping
Hand scraping of the contacting bearing surfaces of cast iron parts is categorically an indispensable technology! All the bearing surfaces of cast iron structures of machine tools should be scraped: beds, columns, tables.
Only SCRAPING eliminates waveness that inevitably arises on surfaces as a collateral result of milling
Only SCRAPING eradicates microcracks, burnings, internal stresses and eliminates charging(impregnation) of surfaces with microabrasives.
Only SCRAPING can make it possible to build machine-tools with long-life accuracy lasting for decades.
Linear servo drives in Sodick EDMs with powerful flat linear motors move the electrode at speeds up to 600 mm/s and accelerations up to 2.0G!
Dynamically and quickly moving up and down, the electrode works like a pump piston, evacuating electroerosion waste incomparably more efficiently than dielectric flushing!
Instead of dielectric flushing, the pumping effect of fast electrode movements is used!
Regardless of the experience of the operator, the complexity or depth of the work – always high-quality machining, EDMing without defects!