How to knock down posts without ruining them?

[Silverridge]

Hi, I was thinking of setting up a fence on the property so the dog can run a bit more freely. So, I went to Jula and bought, among other things, the following products:
Pole: https://www.jula.se/catalog/tradgard/utemiljo/stangsel-och-staket/stolpar/stangselstolpe-006226/
Anchor: https://www.jula.se/catalog/tradgard/utemiljo/stangsel-och-staket/beslag/jordankare-793035/
Post Driver: https://www.jula.se/catalog/tradgard/utemiljo/stangsel-och-staket/verktyg/stolpnedslagare-793089/

When I drive down a pole, the edge at the very top where the post driver hits bends, causing the metal to expand and I can no longer fit the green plastic caps on the pole again.

How is this supposed to be done?

 

[b8q]

Hello, I was thinking of setting up a fence on the property so the dog can run a bit more freely. Said and done, I went to Jula and bought the following products, among others:
Post: [link]
Anchor: [link]
Post driver: [link]

When I drive a post down, the edge at the top bends where the post driver hits, causing the metal to expand, and I can no longer fit the green plastic caps on the post again.

How is this supposed to be done?

Drive the anchor down first, then mount the post, maybe?

 

[Dilato]

Isn't the post driver well made for driving down wooden posts?
https://www.jula.se/catalog/tradgard/utemiljo/stangsel-och-staket/stolpar/trastolpe-016790/

 

[Silverridge]

Drop the anchor first, then mount the post, maybe?

But surely the small anchor alone can't hold a post, it'll be super wobbly?

 

[Silverridge]

The post driver is supposed to be for driving down wooden posts?
[link]

I have followed this video from Biltema (they sell identical products): https://www.biltema.se/fritid/tradgard/stangsel/
About 1:15 into it, they mount a post in an anchor, and then they say you should drive the post into the ground. The question then is how to perform that task without damaging the post.

 

[kniv]

I have followed this video from Biltema (they sell identical products): [link]
About 1:15 in, they install a post in an anchor and then say you should drive the post into the ground. The question is how to perform that step without damaging the post.

Place a thicker piece of wood on top of the post to hit? Usually saves the ends of wooden posts at least.