Mirac homing problems after USB upgrade.
Posted: Tue 23 Aug , 2022 18:56 pm
I have upgraded my Mirac by fitting a standard USB control card ie Baldor/ABB designation NES003-501, Denford designation
B100434Y.
Before fitting the new card I made sure that everything worked correctly when using the existing RS232 card.
Fitted the new card, which EASY UPGRADER identified as a NextMove-ST with USB Interface (Green LED) with up to date firmware.
Selected the machine type as MiracNS and used the Mint File MiracNS.55xx.mnt. Mint file is loaded to machine correctly.
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The problem is that the machine attempts to home SLOWLY in the wrong direction on both the X and Z axes and, if allowed to, will continue to drive the axes until the axes' limit switches are operated generating an Emergency Stop condition. I can affect a partial fix by unticking the Negative X and Negative Z boxes in the "Home" section of Machine parameters. The machine then homes in the correct direction, but still does so SLOWLY. Jogging works correctly with the axes moving the right way.
Other threads suggest that this problem can be down to limit switch problems, but that's not the case here. Operating any of the three limit switches manually, results in the Emergency Stop Relay operating. It doesn't appear to be a proximity detector problem either.
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I've carefully checked the homing operation both before and after the upgrade.
Before the upgrade the axes are driven QUICKLY towards the home position until the proximity switch operates. The drive direction is then reversed and the axes are driven SlOWLY away from the home position until the proximity switch deactivates.
After the upgrade the axes are driven SLOWLY towards the home position and the drive stops once the proximity switch is activated, there being no drive reversal.
----------------------
What has gone wrong here? The machine parameters for the Mirac and MiracNS are very similar.
I have the same problem if I use the MiracNS.mnt file.
Thanks, Max.
B100434Y.
Before fitting the new card I made sure that everything worked correctly when using the existing RS232 card.
Fitted the new card, which EASY UPGRADER identified as a NextMove-ST with USB Interface (Green LED) with up to date firmware.
Selected the machine type as MiracNS and used the Mint File MiracNS.55xx.mnt. Mint file is loaded to machine correctly.
--------------------
The problem is that the machine attempts to home SLOWLY in the wrong direction on both the X and Z axes and, if allowed to, will continue to drive the axes until the axes' limit switches are operated generating an Emergency Stop condition. I can affect a partial fix by unticking the Negative X and Negative Z boxes in the "Home" section of Machine parameters. The machine then homes in the correct direction, but still does so SLOWLY. Jogging works correctly with the axes moving the right way.
Other threads suggest that this problem can be down to limit switch problems, but that's not the case here. Operating any of the three limit switches manually, results in the Emergency Stop Relay operating. It doesn't appear to be a proximity detector problem either.
--------------------
I've carefully checked the homing operation both before and after the upgrade.
Before the upgrade the axes are driven QUICKLY towards the home position until the proximity switch operates. The drive direction is then reversed and the axes are driven SlOWLY away from the home position until the proximity switch deactivates.
After the upgrade the axes are driven SLOWLY towards the home position and the drive stops once the proximity switch is activated, there being no drive reversal.
----------------------
What has gone wrong here? The machine parameters for the Mirac and MiracNS are very similar.
I have the same problem if I use the MiracNS.mnt file.
Thanks, Max.