fanuc ddr rotary table free sample

1- What kind of rotary table/unit do you have? If this is a Fanuc DDR, or any other linear/direct motor type, there should be no backlash. If it"s a worm drive, or rotary cam drive, there could be backlash, but I doubt it. Even for rotary axes, there"s parameters for backlash compensation.

1- Indicate the table at "A0.0" to make sure it"s truly flat. Across the "Y" direction, but also across the "X" direction as well. If it"s not flat across the "Y" axis direction in the "A0.0" position, then you may have to tweak the "home" position. If it"s not flat in the "X" direction, then either the head is out of tram, or the rotary unit itself is not parallel to the table. Sweep across the trunnion table, and the table itself to see if they"re parallel. Rotate the rotary 180* and sweep the same face again - the error should be opposite now, of the same amount.

If the trunnion and table are parrallel, yet when you tram the trunnion table with your indicator (rotate the spindle/indicator, and keep the table stationary) and this check shows the trunnion/table are not square to the spindle, then then the head is out of tram...

2- Rotate the table 90*, as you would in the program. As in, mimic the program as much as possible. If the table is at "A0.0" and you have a "G0 A90.0" line in the program, then go to MDI mode, and execute the same "G0 A0.0" line to mimic the direction, and speed of the index. Then, indicate the same face with the machine, by moving the Z-axis up/down to check this face. Write down your results. Cut the face, and then indicate the same face, using the same method again. Compare results to see if anything moved, which would indicate deflection.

If the Z-axis is truly square to the table, and the head is trammed square to the table, then you should end up with a square part. If something is not square, then either the Z-axis is not square to the table, or the head is out of square.

After adding four-axis or five axis rotary table on the machine tool, multi axis machining can be realized, which can improve the machining efficiency and yield. With the improvement of manufacturing automation in China, the demand for rotary table increases significantly.

Now, I will introduce the situation of several rotary table brands in China. We will divide them into four categories: Europe andAmerica, Japan, Taiwan and Chinese brands.

Japan: Fanuc, Nikken, Tsudakoma, Kitagawa and Sankyo are major brands. They are mainly configured on machine tools of some Japanese brands. Some factories will also be equipped with them  when machining precision parts. Fanuc has the largest market share with, because robodrill is most widely used in 3C industry in china, so many factories are equipped with its DDR

Taiwan: TJR, Detron and GSA are the main brands, as well as DEX, Autocam and HW. These rotary tables are not only configured on Chinese brand machine tools, but also sold to end customers. Their precision is not high and their service life is not long, but they can meet the requirements when machining parts with low precision. Some users will consider these brands when their budget is limited. Among these brands, TJR has the best sales volume, with an annual sales volume of more than 10000 sets, because they have the most complete distribution network, complete models and cheap prices.Most importantl

China: there are many locally four-axis brands in China, such as Gutia,Silvercnc, Blue tech, CP and Deshu. The product quality of these brands is comparable to that of Taiwan. Due to more favorable prices and fast delivery, they have occupied the market of most Taiwan brands. The four axis of Chinese brands mainly adopt roller cam structure or harmonic structure. The wear resistance of roller cam is better than that of worm gear, with long service life and good accuracy retention. The price of harmonic reducer rotary table is low, which is suitable for 3C industry. These two structures meet the needs of the market and have been recognized by customers.

You mentioned in your first post that you"ve got the Tsudokoma Rotary Table. Did you purchase this through Methods Machine Tool? The reason I ask is that we"ve developed a list of Control Parameter Settings which go specifically with that combination of trunnion and machine.

For G68.2, those Euler Angles are not easy to figure out. You would need to take those angles, and use inverse kinematic math to calculate the rotation angles. But again, those angles should not be "correction values", that you are measuring with your Probe. Plus, the "setup" of Tilted Work Plane, Tool Center Point Control, and Workpiece Setting Error Correction on your Fanuc 31i Control, is all dependent on dozens, perhaps even hundreds of Parameter Value Settings. All of those Parameters must be setup correctly as a "group", and each group of Parameters gets modified, depending on "which packages and options were purchased for an individual machine".

Tilted Work Plane, G68.2, will not compensate for your part not being perfectly aligned on the machine, nor will it compensate for Rotary Errors (like where the Centerline of the C-Axis Platter, is not aligned perfectly to the Centerline of the Tilt Axis!). That is the purpose of WSEC. If you need to compensate for your setup, the WSEC Function will give you "6 Degrees of Freedom" for compensating your part. But as I mentioned in my earlier post above, you have to call the functions in a specific "nested order" for activating and deactivating the functions on the machine.

That said, you really should get some training on how to use the Probe, in conjunction with either the CAMplete setup, or your own NX Post Processor. What I mean by this is: how often are you calibrating your Tool Probe, Spindle Probe, and Kinematic Rotation Parameters? (PRM 19700-19705) My recommendation is to run those calibration routines weekly, and "right before any critical operation", until you are comfortable with the precision you can hold on the machine.

There is nothing inherently wrong with using a NX Post, however you will have to do the development to get working TWP, TCPC, and WSEC code output. Are you using "Post Builder" or "Post Configurator"? The new Post Configurator actually has support built in, for those advanced 5-Axis Fanuc Functions, so it might be easy to get that going, if you have licensed that function in NX. Remember that TWP, TCPC, and WSEC all function based off the calibration of the COR parameters, but those COR Parameters are only referenced if you actually "Call the Adv. 5X Functions in your NC Code".