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840C tool length compensation

Created by: greenhorn at: 10/25/2006 7:31 PM (4 Replies)

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10/25/2006 7:31 PM	Rate (0)
greenhorn Posts: 2 Rating: (0)	Somebody out there must know what I need to do to correct this. Our recently aquired 4 axis boring mill has been retrofitted with an 840c Sinumeric controller. No matter which plane isprogrammed (i.e. G17, G18 etc) the machine is taking up the tool length compensation in the Y axis rather than Z axis. I suspect this is a rather simple problem to fix, but I don't know what to change. Everything I try does not work.
greenhorn Posts: 2 Rating: (0)
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10/27/2006 6:20 PM	Rate (0)
SteveJ Posts: 328 Rating: (29)	Dear Sir With regard to your tool compensation problem. I would suggest that you consult the 840C programming guide, It is available from the following location https://www.automation.siemens.com/doconweb/content.asp?item=20&cd=840c_1101_e&scope=all Best regards SteveJ
SteveJ Posts: 328 Rating: (29)
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10/29/2006 11:12 AM	Rate (0)
tomas94 Bronze Member Joined: 10/2/2005 Last visit: 10/23/2024 Posts: 32 Rating: (1)	Are you using D=R101 or D=R102 ...after the your tool name? Tomas

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10/30/2006 7:15 PM	Rate (0)
greenhorn Posts: 2 Rating: (0)	The machine has no tool changer so we have simply programmed "D1", "D2" etc. So far this works fine, but only if I program the plane selection as "G16 x y z+".If I program any other plane seletion it takes up tool length in Y-axis, vertical movement instead of spindle movement. In the plane selection menu, the graphic representation showsthe horizontal component as "X" (table cross feed) like it should be; the vertical component as "W" (saddle infeed) which should be Y; and the Depth component, which would normally be Z is shown as "Y" axis. If I could rotate the cartiesian 90 degrees about X-axis, and swap W for Z (spindle rather than saddle), everything would work as it should. As I understand it these plane axis designations are set by the machine tool builder but I cannot find where they are set. The thing I find odd is that if I cancel tool length comp(D0) and program G17G02x___ y___ I _____ J______ it cuts an arc in X-Y plane just fine. Shouldn't it be trying to cut an arc in the X-Z plane, if the axis are indeed set out as the graphic displays?
greenhorn Posts: 2 Rating: (0)
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11/3/2006 8:47 AM	Rate (0)
tomas94 Bronze Member Joined: 10/2/2005 Last visit: 10/23/2024 Posts: 32 Rating: (1)	In the manual Sinumerik 840C Simodrive 611-D Installation Guide, and page 325 – 327 can you read more about this. Tomas

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