b'\x1b\x1a\x19 \x1f\x18\x1d\x17\x16Machine TechnologyTAKING A RISCBy William LeventonB y eliminating the risk of data starvation, the RISC processor added to a feature-rich vertical ma-chining center makes it an even more attractive option for precision cutting applications.Sold by Methods Machine Tools Inc. in Sudbury, Massachusetts, the VB53 VMC from OKK USA Corp. in Glendale Heights, Illinois, offers a variety of features aimed at mini-mizing vibration and maximizing accuracy for high-end die and mold components, as well as other preci-sion applications.The VB53 is fully loaded for die/mold (machinists) or anybody else who wants to make very accu-rate parts, said Bob Meier, techni-cal product manager at Methods Machine Tools.The VB53 is a compact machine with a footprint of 2,495 mm3,050 mm (98.2"120.1"). The table work surface measures 1,260 mm600 mm (49.6"23.6") and has a load capacity of 1,200 kg (2,645.5 lbs.).The VB53 is a high-accuracy VMC. Methods Machine ToolsDesigned with operators in mind, he said the machines workspace re- respectively. Fine-pitch, high-reso- standard with the VB53.quires 50% less reach to get to thelution ballscrews for travel along theThe VB53 also includes Soft workpiece and spindle than its pre- machine axes increase machiningScale Cube technology that moni-decessor does. precision, as does a 0.05 m resolu- tors and compensates for temper-To improve part quality, the oiltion linear scale. ature-related displacement in real cooler is located externally. An encoder on the ballscrewtime. Meier said data from ther-All OKK machines have chillersmotor is not reading the positionmal sensors is fed to the control-for thermal stability, but in this caseof the table, Meier said. Its justler, which is programmed with the it isnt mounted to the machine,assuming where it is located. Butknowledge of how the VB53 re-Meier said. It is sitting on the floora linear scale along a rail actuallyacts to temperature changes. The because chillers vibrate and youreads the position of the table, so itcontroller also knows how to make dont want that in the machine. is the most accurate (type of) posi- corresponding adjustments so the The machine offers x, y and ztion feedback. machine stays accurate.travel of 1,050 mm, 530 mm andHesaidlinearscalesareop- The machines Fanuc F31i-B con-510 mm (41.3", 20.9" and 20.1"),tional for some machines but cometrol gets an assist from Hyper HQ 6AUGUST 2021 Machine Tech.indd 6 7/19/21 10:37 AM'