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1

Hi everyone-I have a PP65 display that runs a Laguna Smartshop2 CNC and when i start up machine and home it I get the following message on the Y1 & X. “Basis movements: Start movement with absolute target position. Target position exceeds negative SW limit.” Any idea what is causing this. Thanks in advance

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Hi Steve. Each axis has defined sw limits and any new positioning command must be inside of this limit.

Imagine this:
neg limit: 100mm
pos limit: 500mm

your target position must met this condition:

neg limit < target position < pos limit

e.g.

If you abs movement target position is set e.g. 99mm, command will not be started and you will get error " Start movement with absolute target position. Target position exceeds negative SW limit "

usually neg and pos limit are configured based on physical limit of your axis, so very likely you set wrong target position for your absolute move.

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Hi- Thanks for getting back to me so quickly. I don’t think I changed any settings. Where would look in software to see if I had. My CNC table size if 4’ x 8’.

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Hi Jaroslav- One other thing that might help. When I go to home the machine all the axis home correctly. I get the error when homing is done.

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That is correct, without a homed axis you cannot start any movement.

Just a quick thought on what to check..

  • When exactly do you have this error?
  • Can you move your axis manually?
  • Can you see in the visualization the actual and set position, and what are the limits set for your axis in case of error?
  • You have a CNC machine, do you have this error when you start a CNC program?
  • Have you changed anything in the configuration?

Jaroslav

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Steve, are you from Laguna Tools or a customer of Laguna? It’s going to change what you have access to in order to change/fix things.

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Hi- I am a customer of Laguna tools. Their tech support is having trouble figuring out my problem. Thought I would reach out to the B&R community for help.

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Hi- The error happens when I get to the end of homing the machine.

  • I can move the axis only when I clear the screen of errors.
  • the laguna tech saw a screen shot of my screen and all numbers are correct.
  • I can’t start a program until I get the machined homed…can’t go any further.
  • pretty sure I haven’t changed any config.
9

Has there been a battery change or compactflash card change?

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there has been no battery change. The laguna tech is sending me a updated flash card. Do you think that will help?

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..for me it looks like application issue. you have probably found some “corner state” of your axis.From B&R point of view is behavior correct, you can not set target position out of sw limits. So update from laguna tech can definitely help.

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Yes. I think its definitely a machine software problem. I will receive flash card tomorrow and load it. Fingers crossed.:man_facepalming::+1:

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Let us know the result, so we can learn from it and close this topic. Good luck!