Softlimit Values (Backwards & Forwards)

[keithorr]

I am having a problem with the softlimits settings interfering with motion either in G Code or Jog.

A six axis robot arm. The fore and back softlimits are not the same value on two of the axis.

Axis 2 (y) is forward 60, backward -50.
Axis 3 (z) is forward 30, backward -90

If I jog or G Code axis 2 forward, it will stop at 50 and never reach 60. There is no softlimit message. In diagnostics if I click "Why am I not moving?" the answer is "Not stopped, still trying to make last move"
If I jog or G Code backwards, the machine stops at -50 with a softlimit error message as expected.

Same for axis 3: I can only move backward to -30 and the machine stops moving with no message, or forward to 30 with an error message.

Do the forward and backward values need to be the same, i.e. 50 and -50?

The machine zero position is not centered between the limits.

The only workaround I have found is to disable the softlimits, which is not acceptable.

Yes I have looked through the online help under softlimit.

[camsoft]

Hello Ed,

We can help you directly with the Soft Limits. You're still under maintenance so can you please contact us directly and e-mail us your latest CBK and LogFile.FIL files and we will take it from here once we review what you have.

Tech Support
CamSoft Corp.
(951) 674-8100
support@camsoftcorp.com
www.cnccontrols.com

[oaktree444]

when you set up .....home position....travel limits....how far did you roll of limits?

[keithorr]

Oaktree

The situation had to do with using a negative one value in the Gear setting in setup.exe.

I wanted the arm to move positive when going forward, so I needed to enter a negative one in gear to reverse the action when inputting axis values or modify the encoders to reverse the servo direction.

Negative values in Gear mess with Softlimits.