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.

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.

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.)

Differential Factor as used by CPC-HOB should not be confused with the machine's Lead Constant. Differential Factor is used by CPC-HOB to accommodate the Index Constant on some hobbing machines that changes when the differential is locked or unlocked. CPC-HOB automatically compensates for changing Index Constant when the Diff Factor (DF) is entered. The Index Constant for most machines is constant and independent of differential engagement.

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).

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.

CPC-HOB selects suitable index gear sets based on index gear NDP and center-to-center (C-C) distance between fixed index gear shafts. These are user-specified values entered for each machine in CPC-HOB's Hob Machine List. If C-C distance is too small, or if the NDP entered is smaller than actual index gear pitch, then CPC-HOB thinks smaller size gearsets will fit together on the machine.

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.

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.

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.

If you use Windows NT or XP, CPC software is displayed in a small command window on the desktop by default. Personally I like it that way, but I use a large monitor and often switch to other windows. If you prefer full screen however, you can change the command window to be displayed "full screen." There are two ways: You have the option to either make the change just for the current session of for all future sessions.

Dongles are, well, a nuisance to software developers and users alike. Dongles must be physically shipped to users, dongles get lost, and if more than one is attached to a computer's parallel port it can get "Bulky". I never met anyone using dongles that liked them. We use activation keys to protect software with minimum inconvenience to our valued customers. Activation keys protect our investment and permit us to base prices on value and service, not losses.

To do this you must add certain lines to your Linux startup files to add a pseudo slip port to talk to TNOS. First I shall give details of the necessary lines that must be added to your startup files, and then the lines which will need to be added to your TNOS startup file (autoexec.nos). NOTE: You must also have IP_FORWARDING enabled in your Linux kernel. This is set in the make config part of building a kernel. Usually these lines can be put in one of the rc.* files found in # # the /etc/rc.

CPC maintains a sufficient staff of tax and engineering professionals so we can deliver our services to our clients in a consistent and efficient manner.

Once the sheet of wool batting is enclosed in the cotton covering, we tuft or quilt the Underquilt so that the wool will not shift or move around.

I can tell you how I "shift". It may not be this way for others. I welcome any additional comments on this subject for addition here. What I mean by "shifted" is the state of mind that I'm in when I feel closest to my animal spirit. It's a feeling of heightened awareness, a sense of prowess and well-being. It's what defensive-tactics instructors call "Condition Orange"..

HOB Central is a supplemental pick-pack service for Hanes | Outer Banks wholesale customers. Wholesalers will take orders for the products in HOB Central stock and Hanes will pick and package the goods and ship them to the final destination. Distribution centers in Ontario, CA (Southern CA) and Elizabethtown, KY (near Louisville) will support the program, each carrying the full line of available products. Approximately 80% of the US will be serviced in 2 days.

The Hob is the wall at the front of the shower. With improved water proofing methods it is not necessary to have a hob however if you prefer a hob we will construct and tile it.

Our new bag washing system allows an operator to complete his end of shift washdown in 7-10 minutes using an ordinary garden hose. Yes! You can specify the optional recycling back box for the Applied 424HS 'Hi-Speed' and TR models. This box has separate loading ports for plastic bottles and cans and these items are gathered in individual plastic trash sacks ready for later discharge into larger recycling units.