If the gear faces are parallel, the Helix Angle is the same for both gears. This means the machine is Type A. Just for information, the gear lead in this case is different for both gears but the helix angles are the same.) See similar questions...

Feed formulas are found in the machine's manual or on the machine itself. Table Feed as discussed here is the cutter table feed in a direction parallel to the workpiece centerline. It should not be confused with infeed or tangential feed. While some hobbing machines may be equipped with infeed or tangential feed, all hobbing machines are equipped with Table Feed. Some hobbing machines mark the machine with a whole number indicating feed (let's call it K). See similar questions...

There are sources listed in FAQ "Manuals for my Gear Cutting Machinery" that may have the operator's manual you need. Also, the Gear Forum is a good place to ask for this kind of help. If you can't find a source for the differential formula then you can determine the formula for yourself using the following procedure, but you must have a way to measure a gear's lead. See similar questions...

Some differential hobbing machines do not use feed change gears. These machines use a hydraulic control to advance the cutter through the workpiece. A "dial" is used by the operator to control the amount of feed per revolution of the workpiece. See similar questions...

All hobbing machines use an Index Constant that synchronizes rotation of the workpiece with the cutter. For example, a 30:1 index constant means that the index change gear ratio is equal to 30/Teeth for a single start cutter cutting a spur gear. With the correct index change gears, a single start cutter will rotate a number of revolutions equal to the teeth on the workpiece while the workpiece makes one complete revolution. See similar questions...

All gear hobbing machines have an Index Constant. This constant, along with the number of teeth to cut and the number of starts in the hob cutter determine the index gear ratio and the index change gears. Some typical Index Constants are: 36, 30, 24, 15, 12, 10, etc. Let's take an example using a single start hob cutter. See similar questions...

The concept is simple. Let's say the gear to cut is 100 teeth. If it were to be a spur gear (helix angle = 0) then the index gear ratio would be Index Constant divided by teeth. For an index constant = 30, the gear ratio should be 30/100 as shown in the prior topic. Using 30/100 would synchronize the hob to the workpiece so that when the workpiece completes each revolution, the hob would be meshed precisely in the same tooth. See similar questions...

If manual or automatic "step" shifting is used, the normal setup is unaffected. Shifting of the hob in this case occurs during the non-cutting part of the work cycle. If continuous tangential hob shift is used, then an adjustment must be made in the lead change gear ratio. In other words, a spur gear could not be cut without a differential action equal and opposite to the continuous hob shift. See similar questions...

Since it is critical to minimize radiation and to provide complete lung coverage in a breathhold, this test should only be performed on a helical (spiral) CT scanner with current software and hardware upgrades. See similar questions...

made after 1978) pinball game. Older games (pre-1978), also know as "EM's" or Electro-Mechanical" machines are cherished for their history and retro 60's looks, but can be, and See similar questions...

The alumni machine, alumni.cse.ucsc.edu, is currently a Dell Dual 2.8Ghz Xeon machine with 1Gb of RAM. It runs FreeBSD 5.2.1. See similar questions...

You should use only Tempest “Rosco” smoke fluid in Tempest “Rosco” Smoke Machines. The earlier Tempest smoke machines (1601, 1801, 9000) were manufactured by Martin and use a Martin specified formula. Tempest offers a “generic” smoke fluid that is safe to use in other brands of machines including the Martin machines. See similar questions...

This exam must be performed on a spiral (helical) CT scanner. Spiral CT is more accurate than routine chest x-ray in detecting tiny nodules, and compared to conventional non-spiral CT scanners, a spiral scanner can image the entire lung with minimal radiation using a single breathold. See similar questions...

The new C99 Standard specifies type long long as effectively being at least 64 bits, and this type has been implemented by a number of compilers for some time. (Others have implemented extensions such as __longlong.) On the other hand, it's also appropriate to implement type short int as 16, int as 32, and long int as 64 bits, and some compilers do. Additional links: Part of a proposal for long long for C9X by Alan Watson and Jutta Degener, succinctly outlining the arguments. See similar questions...

The machine comes with a limited lifetime warranty against product defects. You may register your machine here. See similar questions...

Among the most known FDA approved Excimer Lasers currently in the market: Autonomous Technology (LADARVISION), Bausch & Lomb Surgical (Technolas 217a), CRS/VISX (Star S2), Nidek and Summit. However, it is the surgeon that is the most important factor in successful LASIK surgery, not the laser. Dr. Cornell chose the autonomous LADARVision Laser because of its exclusive tracking ability. It uses an infrared laser to monitor the position of the eye 4,000 times each second. See similar questions...

You may recall playing a particular machine as a youngster and if you are aged over 40, this will likely be an electro-mechanical game. This type of machine can look attractive and offer a basic but entertaining game. It can also be sited in a room without looking out of place, whereas a modern game will tend to dominate it's surroundings. If reliability and ease of use is of over-riding importance you would probably be better off going for advanced electronic. See similar questions...

The machine if fitted with a refillable LPG tank, will require a bulk LPG tank onsite. This would normally consist of a 2000 litre tank and electric pump. The siting of this tank would have to be confirmed by Calor. See similar questions...