Polygon poor solder mask

[safarir]

Hi,

I am working on a board and I want to tin some very complex polygon poor. What the best way ? They are very complex and I don't want to redraw them ...

Sorry for my bad english,
Thanks for your answers

[free_electron]

emg : edit-move -polygon vertex
then click on the polygon and start moving.

[marshallh]

you can set a manual soldermask pullback. Go into the polygon properties and set the soldermask expension to -100mil or so to start with.

[safarir]

you can set a manual soldermask pullback. Go into the polygon properties and set the soldermask expension to -100mil or so to start with.

The option is available for Polygon Region but not for Polygon Pour ...

[marshallh]

Probably easiest to manually draw a new Polygon region over the existing polygon, on the soldermask layer. Use the 3d view to make sure it works right.

[safarir]

Probably easiest to manually draw a new Polygon region over the existing polygon, on the soldermask layer. Use the 3d view to make sure it works right.

Ok ... thanks

[free_electron]

Ah now i understand whatyou mean. I thought 'thin' a polygon as in make it smaller. So i gave you how to edit it. You want to open the soldermask on it.

here is a trick. Select polygon. Edit - copy - click on a pad of a component . Any component but remeber where you clicked. Now, in the inspector : change the layer of the polygon to top solder ask. If it asks to repour, say no.
Now do edit-paste and click again on the pad of the component you picked when you did edit copy.

Basically what i am doing is storing a copy of the polygon i. The clipboard , using a component pad as origin. I use a component pad as it is a point and altium will 'snap' to the exact centerof the pad.

Then i alter the layer of the existing polygon, telling altium not to redraw it.

After that i paste my copy from the clipboard back in , using that component pad as the placement origin.

This trick works with anything you want to move layers.