TRION PS 300 Out-of-Square Cuts

[CumminsDiesel]

I am not sure that you are going to get much better of a cut with a different saw.
Scot

Agreed, but what is the point of having an expensive Carvex 420 (Trion in the same price as a New Bosch now) if it can't cut perfectly square?

I was thinking to buy Carvex,but reading a lot reviews make me stay away from this saw.

If I can't cut a 4X4,for example a PERFECTLY square,I don't need this saw!

No jigsaw can do that. You need a 12" miter saw.

"The post was installed and I have no chance but cut it vertically."

But, if you're trying to make a cut on an erect post you'll need some help to do it with a miter saw. 
It's safer to use a jigsaw or hand saw.

It takes some skill with either saw to get good results. You'll get the best results if you start off with the hand saw.

The loose end of the jigsaw blade wiggles laterally until it is establishes a kerf. If you start the saw and simply proceed to cut it's a crapshoot what angle the blade will be when it starts to form a kerf. Whatever angle is established by the wiggling blade is likely to be  the angle of the cut all the way across.

If you are cross-cutting an erect post the blade is also influenced by gravity. That doesn't influence the odds of the angle crap-shoot, it just increases the maximum blade deflection in one direction.

If you can get the blade to start cutting square you'll have a much better chance of making the whole cut square.

First layout the cut on two adjacent sides with a square and pencil or better yet a knife.
Then start the cut on the blade face of the post with a good handsaw close to the same kerf thickness as the jigsaw blade.
Put the speed of the jigsaw on slow and get the loose end of the blade started first then slide the base farther onto the post so the whole blade is engaged in the wood.
Switch to full speed and complete the cut.

If you don't have a handsaw you can get a kerf started on the far corner (getting a kerf started to contain the loose end of the blade is most important) of the post by allowing only the part of the blade closest to the shoe to engage the wood. Hard to explain but it means starting the cut from the opposite face of the post first to get a well placed kerf established.

Then start the jigsaw slowly and with the loose end of the blade in the kerf and slide the saw up onto the face of the post and switch to full speed as above

Very informative! Thank you so much!

 

[mouppe]

My trion can handle that cut no problem.

Any pictures?

My Trion can't do it perfectly square.

I'm popping over to my workshop later, and I think I have a 16/4 piece of sapele and a long jigsaw blade lying around. If I do, I'll take a 10 second video of the cut.

 

[CumminsDiesel]

My trion can handle that cut no problem.

Any pictures?

My Trion can't do it perfectly square.

I'm popping over to my workshop later, and I think I have a 16/4 piece of sapele and a long jigsaw blade lying around. If I do, I'll take a 10 second video of the cut.

Appreciate it!

 

[mouppe]

My trion can handle that cut no problem.

Any pictures?

My Trion can't do it perfectly square.

I'm popping over to my workshop later, and I think I have a 16/4 piece of sapele and a long jigsaw blade lying around. If I do, I'll take a 10 second video of the cut.

Appreciate it!

Here you go. It's just a couple of minutes long. The first cut I made was off by a degree or so, and I discovered my base was not square to the blade. Once I had corrected this, I shot the video and you can see the results for yourselves. Dead square.

 

[CumminsDiesel]

My trion can handle that cut no problem.

Any pictures?

My Trion can't do it perfectly square.

I'm popping over to my workshop later, and I think I have a 16/4 piece of sapele and a long jigsaw blade lying around. If I do, I'll take a 10 second video of the cut.

Appreciate it!

Here you go. It's just a couple of minutes long. The first cut I made was off by a degree or so, and I discovered my base was not square to the blade. Once I had corrected this, I shot the video and you can see the results for yourselves. Dead square.

Thank you so much RL,well I think I did something wrong,its supposed to be  square,and you prove it!I'm so appreciate!