In most you want a motor that skips before it grinds on the filament. When only the filament jumps around, but the shaft turns, it usually means grinding. I usually paint a small line on the motor shaft to quickly see if the extruder is skipping because that’s when the shaft doesn’t turn continuously anymore. Skipping means that the stepper motor loses a step. If your extruder is not strong enough to push the material forward or to shear away the material, it will skip. Additionally, you’ll create more friction in the bearings and might even break your idler arm if the pretension is too high! Ideal pretension in most cases means that you have some indentation of the extruder gears on your filament so that enough torque can be transferred but not so much that you crush the material and waste energy at the extruder and make the deformed material harder to feed. Crushing, so permanent, plastic deformation takes a lot of the motor’s energy, and you, therefore, lose power to convey the material forward. This doesn’t only deform the material and makes it harder to feed. On the other hand, the filament literally gets crushed if you apply too much pressure. This causes grinding shows in grooves on the material. This way, only little force can be transmitted via positive engagement, and most of it will come from friction between the gear and the material. In this case, the teeth of the gears just barely dig into the filament. 87990cbe856818d5eddac44c7b1cdeb8Īppeared in the January 17, 2023, print edition as 'Investors Scrutinize IT Defenses.Let’s look at two extremes. “It’s no longer a minor thing that maybe the operating team should deal with, but it’s front and center for the lead partners at a lot of these funds.”
“The willingness to take chances is way down than it was in the past,” he said. Stafford said, his company has a cybersecurity advisory group that meets quarterly or twice a year with around 30 funds to examine portfolio companies’ cyber postures.
Many private-equity firms are taking a similarly serious approach to cyber, said Chris Stafford, a partner in the mergers and acquisitions group at advisory firm West Monroe Partners LLC, in part due to the increased visibility of-and responsibility for-cyber risk management at senior executive levels.ĭue diligence processes now aren’t just focused on whether a company has the right policies or governance in place, but can now include network scanning and penetration testing, where security specialists attempt to break into systems, he said. Calhoun said, adding that companies require cyber upgrades almost every time. Sundaram, a former chief digital and technology officer at airline JetBlue Airways Corp.Įvery portfolio company gets this treatment, Mr. The idea is “to bring the security of companies to our minimum standards,” said Mr. Virtual CISOs help with creating security policies, testing controls, advising chief executives and technology officers, and reporting to the board, said Each portfolio company gets at least 10 hours each month of access to such a CISO from companies including Tailwind contracts with consulting firms for a certain number of hours a year of work with virtual CISOs, who are often retired corporate security chiefs. It also requires companies to have a chief information security officer either full-time or through Tailwind’s relationships with cybersecurity companies. Tailwind requires portfolio companies to have multifactor authentication, network security, cyber insurance, and an incident-response team or access to one at a cybersecurity company. “Cybersecurity has evolved significantly as a risk factor, and it’s an area that requires due diligence before we even make an investment,” said Mr. In addition to fundamentals such as financial health and management structure, they’re often looking at cybersecurity. Private-equity companies are also stepping up how they assess companies they may wish to buy. “The insurance industry and regulators are almost driving the same controls into a company to make them perform better,” he said.
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