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xy interpolation 5-axis machine

Created by: dehghan at: 5/22/2012 7:46 AM (4 Replies)

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5/22/2012 7:46 AM	Rate (0)
dehghan Posts: 9 Rating: (0)	Dear all I generate NC program free face part by power mill software with polygon method and then execute that on 5-axis and 3-axis CNC machines. On 5-axis CNC machine table not move softly when x-axis and y-axis move interpolation. But on 3-axis machine table move circular (move X&Y axis) softly. I circular test and move table circular by G2 in MDA mode on 5-axis machine it is not problem and move softly. I use G642 and cycle832 but problem occur again. Please help us where is problem. Sincerely
dehghan Posts: 9 Rating: (0)
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5/22/2012 10:37 AM	Rate (0)
Mr_Al Advanced Member Joined: 12/29/2011 Last visit: 1/6/2023 Posts: 39 Rating: (9)	Below is a possible answer to this same question a few days ago. You might need the System clock and IPO ratio setup improved. Check the processor load and Interpolator Buffer while doing your test programme which causes vibration. The actual processor loading can be viewed while a part program is running: From the "Machine page", press the "Menu select" key, then the "Diagnostics" softkey, then the "Service displays" softkey, then the "System resources" softkey. This “NCU Load” display, (percentage of time used by the position control and interpolator), should not be higher than 80%. The “Filling level of interpolator buffer” display should be above 95% when running a large part program with many short blocks such as your test program. The interpolation buffer is probably emptying and this would cause a vibration. The cnc stops and starts axis movement because it runs out of movement blocks. You need to contact your machine builder to fix a problem like this. Best Regards Mr_Al

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5/28/2012 2:55 PM	Rate (0)
dehghan Posts: 9 Rating: (0)	dear Mr_Al thank a lor for you regarding i Check the processor load and Interpolator Buffer while doing my test programme : “NCU Load” =18-22% “Filling level of interpolator buffer” =100% and when we move X,y or z axis by handwheel machine has vibration. sincerely
dehghan Posts: 9 Rating: (0)
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5/28/2012 9:12 PM	Rate (0)
Mr_Al Advanced Member Joined: 12/29/2011 Last visit: 1/6/2023 Posts: 39 Rating: (9)	Is your control in Continuous path mode "G64" Mode or Exact Stop Mode "G60" when running the test programme with lots of small G1 moves? You can read up on this in Section 5.1 of the "840D Programming Manual Fundamentals" or click on the link below for this same section from DoconWeb. Path Action Explanation Also. The vibration while using the Handwheel could be relevant. Perhaps the Axis Positioning Gain is set very high, what values are in MD 32200 for X and Y Axis Please? Key sequence to reach them with the Service Password set is Menu Select-Start Up-Mach Data-Axis MD Use the Vertical Softkey Axis+ and Axis - to find X and Y. Best Regards Mr_al

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6/22/2012 3:36 PM	Rate (0)
dehghan Posts: 9 Rating: (0)	Dear Al afterchange some parameters and use some G code that you say me before machine is better but machine vibration in two Quadrant as you know We have five axis CNC machine with 840D SL controller and we want to do a circular test and search in all section of HMI but cannot find circular test item . Where is circular test page or who we can active this page?? Sincerely
dehghan Posts: 9 Rating: (0)
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