Electronics > Altium Designer

Disable routing to a pad?

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microbug:
Hi all,

This has been driving me up the wall recently. I'm routing a board that has a large electrical through hole pad on the top layer (a surface mount threaded pillar). On the bottom layer it's just a mechanical hole. However, every time I try to start routing from the circled pads that fall under the top layer copper for this pad, Altium starts routing from the centre of the bottom layer mechanical hole rather than the ESD diode pads circled (or if I use differential routing, I just get an error about no complementary net existing).

Is there a solution here that I'm missing? So far I've been manually moving the pad out of the way every time I need to route under it...

Edit: starting the routing from the other pads that aren't under the pillar also works, but this doesn't work everywhere because some nets are completely under a pillar.

ajb:
Have you tried removing the bottom layer pad from the pillar Pad Stack (setting the size to zero)?  Or maybe create the footprint with the non-plated hole and top side pad as separate objects?

thm_w:
Is hotspot snap set to off (Shift+E)?

tooki:
Try using single-layer mode (shift+S, I think) and/or setting snapping to the current layer only (and make sure you’re starting with the bottom layer active!).

You can also try reducing the hotspot snap distance.

microbug:
None of those suggestions work unfortunately. Even with snapping turned off entirely / single layer mode / zero size bottom layer hole, it still snaps to the centre of the hole when clicking anywhere within the diameter of the top layer pad.

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