b'\x1b\x1a\x19 \x1f\x18\x1d\x17\x16Machine TechnologyMACHINE MAKEOVERBy William Leventon models is 610 mm (24") along the y- proved accuracy and repeatability, axis and 635 mm (25") on the z-axis. plus the big-bore 40-taper boosts Y ou may have seen machine toolsIn most cases, Reeves said, thestiffness and allows increased depth with the same names before.fact that the D 800 provides asof cut during machining.But youve never seen anything likemuch y- and z-axis travel as its largerCompared with the previous D the new generation D series verti- counterparts is an advantage be- series versions, the new machines cal machining centers from Romicause customers usually want moreshow cutting depth increases of Machine Tools Ltd. in Erlanger, Ken- travel distance along those axes.up to 133% before vibration oc-tucky, said Regional Sales ManagerOn the other hand, this also makescurs, according to testing by Romi. Steve Reeves. the D 800 a larger machine. In machining operations, Reeves The D series VMCs have been redesigned completely for improved performance.Romi Machine ToolsHe said although the latest D se- If you need to get a machinesaid, the result is fewer passes and ries machines kept the names ofinto a very tight space, he said, theshorter cycle times.their predecessors, they are brand- D 800 may not physically fit whileDseriesspindlesoperateat new machines from top to bottom. some of our competitors smallerspeeds of 10,000 or 15,000 rpm, In the U.S., Romi Machine Toolsmachines will. which he said is too low for mint-sells three D series models: the 6,577Like all Romi machine tools, D se- ing and other applications that re-kg (14,500 lbs.) D 800, which offersries machines feature Romi-madequire very high spindle speeds. He 787 mm (31") of x-axis travel; thecast-iron beds that absorb vibration.noted, however, that the addition 6,895 kg (15,200 lbs.) D 1000, whichIn addition, all the machines areof a speeder head could boost the offers 1,016 mm (40") of x-axis travel;equipped with big-bore, 40-taper,speed of D series spindles to 60,000 and the 6,985 kg (15,400 lbs.) D 1250,direct-drive spindles. The companyrpm.which offers 1,270 mm (50") of x-axispoints out that direct-drive technol- Reeves said the new machines are travel. Maximum travel for all threeogy offers low maintenance and im- the first in North America equipped 12SEPTEMBER 2020 MachineTech.indd 12 8/14/20 3:00 PM'