Author Topic: Altium+cnc pcb pad issue  (Read 1383 times)

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Offline RectangularThomTopic starter

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Altium+cnc pcb pad issue
« on: February 18, 2022, 12:02:35 am »
I have a double sided pcb to design and I am gonna mill it myself with my cnc router.

Since I dont know how to plate via/pads, I need to configure altium to used only the opposite layer for through-hole components

I tried using a custom via/pads library to make single sided pads by deleting the opposite layer but altium put them back when I use it.
Next I tried to keep using normal pads but making design rules to prevent connecting traces to the same layer as the component but I cant make it work either

I think I'm gonna try making holes with traces around them instead (in the component footprint itself)
 

Offline RectangularThomTopic starter

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Re: Altium+cnc pcb pad issue
« Reply #1 on: February 18, 2022, 06:55:31 am »
Nothing worked since Idk how to prevent connections based on component class

I just ended up verifying manually
 

Offline T3sl4co1l

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Re: Altium+cnc pcb pad issue
« Reply #2 on: February 18, 2022, 03:13:07 pm »
What do you mean prevent connections?  Is this an autorouter problem?

You can make a custom pad stack by placing a pad on bottom layer only, for example, then a separate unplated hole in the same place.  Check that the hole is set to "No Net" and add a clearance rule allowing them to overlap in that particular circumstance (e.g. in applicable footprints).  (It may help to name the holes '0' or something like that, while the pads are named as usual for association with the schematic symbol.)

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Offline RectangularThomTopic starter

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Re: Altium+cnc pcb pad issue
« Reply #3 on: February 19, 2022, 07:43:10 pm »
The pcb is being mill as I write this but since I'm pretty sure there will be a revision, I'll make sure to try this. Thx!

And it's not really an autorouter problem, more like the ground polygon pour make altium think pads are connected because it thinks the pad will be connected on both sides
« Last Edit: February 19, 2022, 07:46:23 pm by RectangularThom »
 

Offline free_electron

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Re: Altium+cnc pcb pad issue
« Reply #4 on: February 19, 2022, 08:03:09 pm »
just leave the pad on both sides. you can use it as a via by soldering tap and bottom...
Professional Electron Wrangler.
Any comments, or points of view expressed, are my own and not endorsed , induced or compensated by my employer(s).
 

Offline RectangularThomTopic starter

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Re: Altium+cnc pcb pad issue
« Reply #5 on: February 20, 2022, 03:41:57 am »
I dont think so since I cant solder underneath components like screw terminal. Only the opposite layer is easy to solder
 

Offline tooki

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Re: Altium+cnc pcb pad issue
« Reply #6 on: March 12, 2022, 05:48:26 pm »
I still don’t understand what the issue is. Just lay out your traces and ground pour on the bottom layer only and that’s that.
 


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