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Reset offset back to zero 840d

Created by: Chillin at: 2/12/2009 9:00 PM (9 Replies)

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2/12/2009 9:00 PM	Rate (0)
Chillin Posts: 1 Rating: (0)	Hello All, I am running a part in Traori that rotates my pallet to 4000 deg by the time it is done cutting the contour, When it changes to the next tool, the pallet has to "unwind" back to zero. What is the best way to reset my offset back to zero in the program and have the pallet in the right position without having to "unwind"? Thanks
Chillin Posts: 1 Rating: (0)
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2/12/2009 9:17 PM	Rate (0)
Gebhardt Karl Platinum Expert Joined: 7/16/2006 Last visit: 12/8/2023 Posts: 1502 Rating: (176)	Hi Give a G-Code for Referenzpoint-Drive. G74 X1=0 Y1=0 Z1=0 A1=0
	Karl
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2/12/2009 11:22 PM	Rate (0)
owenfred Posts: 30 Rating: (1)	I looked at the ISO programming manual and this code seems to be for tapping. I think he is trying to prevent the rewind of 4000 degrees at the end of the program.
owenfred Posts: 30 Rating: (1)
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2/13/2009 8:22 AM	Rate (0)
TSH Posts: 73 Rating: (2)	Hello Tryto find out within your part programmehow the palletis moved. Presumably at the end of the programmeis the command to return the pallet to zero, can this command be moved to an earlier place within the part programme? Regards
TSH Posts: 73 Rating: (2)
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2/13/2009 4:38 PM	Rate (0)
owenfred Posts: 30 Rating: (1)	The command is tyhe M30 which signifies a program rewind (start over) The idea was to not have the C axis rotate -4000 degrees and just do an incremental rotation back to 0 degrees and reset the rotary values in the control.
owenfred Posts: 30 Rating: (1)
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2/14/2009 10:55 AM	Rate (0)
TSH Posts: 73 Rating: (2)	Hello Not fully understanding what you mean, but have a look at the document. You can write/read a variable (Offset) in the part programme, maybe this is what you are after. Regards Attachment Frames.pdf (185 Downloads)
TSH Posts: 73 Rating: (2)
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2/18/2009 12:00 AM	Rate (0)
owenfred Posts: 30 Rating: (1)	I read through the document you sent as I have many times. I think what I am doing is different because I am using TRAORI. Ex. G54 TRAORI G1 X... Y... Z... A3=... B3=... C3=... X... Y... Z... A3=... B3=... C3=... and so on TRAFOOF M30 The code causes the Caxis to rotate around and countour up to about 4000 degrees. On the M30 line after the TRAFOOF the Caxis roatates -4000 degrees in Rapid to get back to 0 degrees. It really only needs to go -40 degrees. Since this is all in machine coordinates "NOT FRAMES" The question is: How do I get the machine to ratate back to zero incrementally and reset the Caxis to 0? Thanks
owenfred Posts: 30 Rating: (1)	Last edited by: owenfred at: 2/18/2009 12:03 AM
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2/18/2009 6:41 PM	Rate (0)
SteveA Posts: 297 Rating: (41)	Is your control set for ISO mode or standard Siemens mode? In Siemens mode, Gebhard's reply is correct, G74 will cause the axis to re-reference itself (depending on encoder type - incremental, distance coded, absolute). The equivalent ISO command is G28 C0 HTH, SteveA
SteveA Posts: 297 Rating: (41)
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2/18/2009 6:42 PM	Rate (1)
owenfred Posts: 30 Rating: (1)	This question has been answered by a Siemens rep over the phone. (Thanks for the help you know who you are). The machine parameters 30310 and 30320 need to be changed to 1 so the machine counts in MODULO instead of Absolute. This will cause the axis to go from 359.999 to 360 then 1 instead of 360 then 361... This should not affect my programming since I use cycle800 between 0 and 360 and TRAORI with tool vectors (A3,B3,C3). I hope this helps someone else out. The information is in the "function manual extended functions". Owen * The information in this message comes with no warranty. Use at you own risk and always make an archive before changing any machine parameters.
owenfred Posts: 30 Rating: (1)
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7/11/2017 6:11 PM	Rate (0)
KBPatel Posts: 1 Rating: (0)	Chillin Hello All, I am running a part in Traori that rotates my pallet to 4000 deg by the time it is done cutting the contour, When it changes to the next tool, the pallet has to "unwind" back to zero. What is the best way to reset my offset back to zero in the program and have the pallet in the right position without having to "unwind"? Thanks I know you must have solved the problem. I had a similar issue. I end up changing MD30310 to 1 (ROT_IS_MODULO) and that fixed the problem.
KBPatel Posts: 1 Rating: (0)
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