The rack and pinion is mechanical and does not require air to operate.LaunyO said:2) I was afraid that some air could be blocked between the rack and the pinion.
I do not fully understand what you mean. (Btw I am French, so I get by in English but it is not my native language...)Baluncore said:You do not mention contact forces, the number of cycles, or lubrication requirement. The steel ball bearings for the rotating anode X-ray tube motors were lubricated with lead dust because it did not evaporate.
Yeah thanks I know google translate... I still do not understand your last sentence, even translated in French.Baluncore said:Use Google translate ...
"Vous ne mentionnez pas les forces de contact, le nombre de cycles ou les exigences de lubrification.
Les roulements à billes en acier des moteurs à tube à rayons X à anode tournante ont été lubrifiés avec de la poussière de plomb car elle ne s'est pas évaporée."
Ask specific questions. Posez des questions spécifiques.
Vanadium 50 said:How much vacuum are we talking about? 10-7 Pa? 10-9? Lower?
Because 316L can be slightly magnetic.Vanadium 50 said:That's not crazy high (much softer than the LHC vacuum). I'm not an expert, but see no reason 316L stainless wouldn't work.
When you machine non-magnetic stainless steel the surface and the swarf become magnetic. Then the magnetic state changes over time as the crystal structure evolves.Vanadium 50 said:I'm not an expert, but see no reason 316L stainless wouldn't work.
Baluncore said:When you machine non-magnetic stainless steel the surface and the swarf become magnetic. Then the magnetic state changes over time as the crystal structure evolves.
Rack and pinion refers to a type of mechanical actuator commonly used in Ultra-High Vacuum (UHV) systems to control the movement of components. It consists of a gear (the pinion) and a toothed bar (the rack) that engage with each other to convert rotational motion into linear motion.
In an Ultra-High Vacuum, the rack and pinion actuator is typically driven by a motor or a manual hand crank. The motor rotates the pinion gear, which in turn moves the rack in a linear direction. This movement can be used to open and close valves, adjust the position of samples, or control other components in the UHV system.
Rack and pinion actuators are preferred in UHV systems due to their high precision and repeatability. They also have a compact design, making them suitable for use in confined spaces. Additionally, they have a low outgassing rate, which is crucial in maintaining the high vacuum environment.
One limitation of rack and pinion in UHV systems is its susceptibility to contamination. The gear teeth can become clogged with debris, affecting the precision and smoothness of movement. To mitigate this, regular cleaning and maintenance are necessary. Additionally, the gear lubricant used must be compatible with UHV conditions to prevent contamination.
Yes, there are other types of actuators that can be used in UHV systems, such as linear and rotary feedthroughs and piezoelectric actuators. However, rack and pinion remains a popular choice due to its reliability, precision, and cost-effectiveness.