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Sinumerik 840 D - Coolant pressure and flow control

Created by: jimmi_swe at: 7/15/2013 3:01 PM (16 Replies)

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7/15/2013 3:01 PM	Rate (0)
jimmi_swe Posts: 11 Rating: (0)	Hi, Experts! I have some questions and wonder if you can help me with them. The machine is a hermle C50 U with sinumerik 840D pl controller. 1. About coolant, can we measure the coolant pressure and coolant flow somehow? 2. Can we change the coolant pressure and flow during the machining? I mean, in the NC program, can we program it, so in some way we change the pressure and flow during the machining? 3. Can we measure the spindle power? If yes, how to do that? Does it exist as a signal or parameter? Thank you for your time!
jimmi_swe Posts: 11 Rating: (0)
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7/16/2013 10:28 AM	Rate (1)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877)	jimmi_swe Hi, Experts! I have some questions and wonder if you can help me with them.The machine is a hermle C50 U with sinumerik 840D pl controller.1. About coolant, can we measure the coolant pressure and coolant flow somehow?Thank you for your time! Hello, Yes it is possible. You need to connect pressure switch & flow switch in coolant circuit. Depending upon input sensor types necessary hardware needs to be incorporated & PLC logic to be modified. With all this you can read those parameters in your system. jimmi_swe Hi, Experts! 2. Can we change the coolant pressure and flow during the machining? I mean, in the NC program, can we program it, so in some way we change the pressure and flow during the machining?Thank you for your time! Yes, you need to modify the logic NC & PLC, define M codes, add coolant valves which shall vary the pressure & flow. jimmi_swe Hi, Experts! 3. Can we measure the spindle power? If yes, how to do that? Does it exist as a signal or parameter? Thank you for your time! Yes with standard spindle display screen, spindle power in terms of percentage is displayed. Please provide HMI & NC details for more information.

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7/16/2013 1:11 PM	Rate (0)
jimmi_swe Posts: 11 Rating: (0)	Yes with standard spindle display screen, spindle power in terms of percentage is displayed. Please provide HMI & NC details for more information. Can you send me a link?
jimmi_swe Posts: 11 Rating: (0)
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7/16/2013 2:06 PM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877)	Please follow this link.

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7/16/2013 2:49 PM	Rate (0)
jimmi_swe Posts: 11 Rating: (0)	PISCEAN 2010 Please follow this link. I am so sorry, but I can only find information about spindle speed monitoring....can't find the information about the spindle power percentage you was talking about... Please help me..
jimmi_swe Posts: 11 Rating: (0)
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7/16/2013 3:09 PM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877)	hello, Please provide us NCU details, HMI s/w details so as to help you. The link was helpful to understand spindle drive comissioning.

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7/16/2013 3:11 PM	Rate (0)
APC Tech Team Posts: 391 Rating: (50)	jimmi_swe PISCEAN 2010 Please follow this link. I am so sorry, but I can only find information about spindle speed monitoring....can't find the information about the spindle power percentage you was talking about... Please help me.. $AA_LOAD [31] Drive load reference: $AA_LOAD[X] Drive utilization in % X = Drive number
APC Tech Team Posts: 391 Rating: (50)
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7/19/2013 2:29 PM	Rate (0)
jimmi_swe Posts: 11 Rating: (0)	Hi, Now we are in the next step of the project. We have decided to install some external pressure and flow sensors into the coolant circuit. (see picture in attachment) Question is now how to read the value of the sensors from the NC? I mean, can we connect the sensors to PLC somehow and then modified the PLC logic and save the value in some R-parameters? If the answer is yes, does the value update continuously? Attachment Capture.JPG (218 Downloads)
jimmi_swe Posts: 11 Rating: (0)
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7/19/2013 2:41 PM	Rate (1)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877)	jimmi_swe Hi, Now we are in the next step of the project. We have decided to install some external pressure and flow sensors into the coolant circuit. (see picture in attachment) Question is now how to read the value of the sensors from the NC? I mean, can we connect the sensors to PLC somehow and then modified the PLC logic and save the value in some R-parameters? If the answer is yes, does the value update continuously? Hello, You need to select sensor first depending upon the parameters you want measure &control like flow rate, pressure, min & max etc. Then from input sensor feedback values whether it is 0-10 volt or 4-20 mA etc you need to select PLC analoge modules. Same case for out put devices like solonide valve, flow control valve, PLC out put modules needs to be selected. Your PLC HW as well as s/w logic needs to be modified as well NC logic also (R parameters, M codes configuration). Then you can achieve your requirement. While selecting PLC modules, its compitability needs to be confirm. I suggest you to contact your local Siemens service support for this engineering. Also selection of sensor & their comptability to be checked properly. Regarding value updatation, what is your requirement? How precisely you want? Itdepends upon your sensor & out put devices. Because NC, PLC scaning time is in ms, so, have a proper engineering about the input sensors, coolant system & out put devices & then proceed further. Hope this help you.
	Last edited by: PISCEAN 2010 at: 7/19/2013 2:45 PM Value updatation infomation added
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7/22/2013 11:13 AM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877)	jimmi_swe PISCEAN 2010 Please follow this link. I am so sorry, but I can only find information about spindle speed monitoring....can't find the information about the spindle power percentage you was talking about... Please help me.. Hello, Please check the values in MD 9428 & 9429. These should be 100. If not set to 100, switch Off & again switch ON power. This should display the actual spindle power in % as well as in form ofbar.

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