No configuration pages for Y2 Axis

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06 Jan 2026 16:02 #341073 by scsmith1451
No configuration pages for Y2 Axis was created by scsmith1451
Hi All;

I finally have the second Y Axis installed on my machine and was trying to configure it.  I'm using a MESA i76u board. When I started pncconf, I selected to modify my existing single Y axis configuration since it worked beautifully. I increased the number of Step/Dir channels to 5 as my machine was currently configured for a 4th rotary axis.

On the Axis configuration page I set the 5th Step/Dir configuration to Y2 Tandem, and on the P3 pin configuration page I added the input for the Y2 Tandem Both Limit & Home. I moved through the X Motor config as it was already working correctly to the Y Motor configuration which I verified till worked as expected. I expected the Y2 Motor to be the next configuration page, however pncconf proceeded to the Z, then A axes with no page to configure Y2.

Did I miss something earlier in the config process that would generate a configuration for Y2? Perhaps I needed to set the machine configuration to xyyza or xyy2za or something akin to it? 

A little help would be greatly appreciated.

Also, what happened to my previous topics? Are they automatically purged with a new year? 

Regards and happy New Year

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06 Jan 2026 17:01 - 06 Jan 2026 17:55 #341075 by PCW
Replied by PCW on topic No configuration pages for Y2 Axis
AFAIK, in pncconf a tandem axis simply duplicates the the primary axis
(with a different stepgen and joint position command) so any differences
(like a reversed direction) would need to be done by editing
the hal or ini file.
Last edit: 06 Jan 2026 17:55 by PCW.
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06 Jan 2026 17:25 #341077 by tommylight
Replied by tommylight on topic No configuration pages for Y2 Axis

Also, what happened to my previous topics? Are they automatically purged with a new year? 

No they are not.
Do you recall the tittle or some exact part of the content or section of the forum or anything that might help find it?
Usually they can be restored, if not permanently deleted.
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06 Jan 2026 18:40 #341083 by scsmith1451
Replied by scsmith1451 on topic No configuration pages for Y2 Axis
I don't need them, this post was a continuation of a previous post on the subject of adding a second Y axis to my machine. But PCW has answered my question so finding the previous post is a not necessary.

Thx,
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08 Jan 2026 13:28 #341168 by scsmith1451
Replied by scsmith1451 on topic No configuration pages for Y2 Axis
After creating the new profile, I was comparing the Y configuration in the .ini to the Y2 configuration and both to the original single Y axis configuration. I noticed the the HOME_SEQUENCE for Y and Y2 is set to -3 in the dual Y axis configuration rather that 3 like the original single Y axis configuration.

I seem to remember reading in the documentation that when the HOME_SEQUENCE is set to the same value for two axes they both home together. Is -3 correct for a dual Y axes configuration?

Kind Regards,

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08 Jan 2026 19:45 #341174 by tommylight
Replied by tommylight on topic No configuration pages for Y2 Axis

Is -3 correct for a dual Y axes configuration?

Yes it is, tandem joints must have negative value for homing sequence.
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