Having trouble with your Festool power tool? Well, we're here to help you. Before posting to the forum, give us a chance to diagnose and resolve your issue. In the U.S. and Canada, call us toll-free at 888-337-8600 on Monday-Friday between 8a-5p EST or contact us via email at service@festoolusa.com. For other countries, please visit http://www.festool.com for contact information for your local Festool service department.

Author Topic: Carvex 420 cannot cut straight - Problem Solved  (Read 12923 times)

0 Members and 1 Guest are viewing this topic.

Offline Gregor

  • Posts: 955
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #30 on: March 04, 2018, 09:00 PM »
Festool doesn't recommend cutting 3/4" material with the Carvex on a rail as has been posted here prior.
As festool sells the ADT-PS 420 for the carvex, advertised with for using the PS on the guide rail and it, as you write, isn't suitable to cut <2cm (3/4") thick material in this scenario... what is the Festool recommended use case for this item?

Festool USA does not pre-approve the contents of this website nor endorse the application or use of any Festool product in any way other than in the manner described in the Festool Instruction Manual. To reduce the risk of serious injury and/or damage to your Festool product, always read, understand and follow all warnings and instructions in your Festool product's Instruction Manual. Although Festool strives for accuracy in the website material, the website may contain inaccuracies. Festool makes no representations about the accuracy, reliability, completeness or timeliness of the material on this website or about the results to be obtained from using the website. Festool and its affiliates cannot be responsible for improper postings or your reliance on the website's material. Your use of any material contained on this website is entirely at your own risk. The content contained on this site is provided for informational purposes only and does not constitute professional advice.


Offline Laminator

  • Posts: 319
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #31 on: March 04, 2018, 10:12 PM »
My carvex has the same problem trying to use a guide rail.  I tried it when I first got the saw just for kicks because I never need to make perfect straight cuts with the carvex.   The cause of this is that the blade is not parallel to the center line of the saw.  You can check by turning the saw upside down and placing a precision straight edge against the side of the blade.   

Offline Peter Halle

  • Global Moderator
  • *
  • Posts: 11499
  • Another Avatar Coming Soon
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #32 on: March 05, 2018, 08:09 AM »
Correction. - Festool does not recommend over 20 mm workpiece thickness.  See page in owner's manual.



Peter

Offline lwillis

  • Posts: 5
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #33 on: March 05, 2018, 01:08 PM »
Hi Peter,

[Peter] "Festool doesn't recommend cutting 3/4" material with the Carvex on a rail as has been posted here prior"
[Peter] "Correction. - Festool does not recommend over 20 mm workpiece thickness.  See page in owner's manual."

(emphasis mine)

3/4" is not over 20mm, so I'm under the recommended limit.   (3/4" = 19.05mm)

And while I could make this particular cut with a different saw, I was intentionally using the Carvex to learn the saw and familiarize myself with it's operation on what should be a pretty straight-forward cut (no pun intended). I want to know whether this is just problematic thickness on a relatively soft material -- mellamine, or if my new saw has a defect.   Maybe the blade-holder assembly is misaligned.   If it can't cut mellamine straight, what can it cut straight?

I'm eventually going to need to cut a circular hole out of this same 3/4" mellamine.  If the Carvex can't cut a straight line w/o bending, it's not going to cut a circle properly either.


Offline grobkuschelig

  • Posts: 400
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #34 on: March 05, 2018, 03:20 PM »
The FSG blades (75) are stated for a material thickness of up to 55mm.
With the long FSG blades I have cut 90mm straight.

I have the feeling that the „cautious 20mm limit“ is coming from the fear that people will expect the tool to deliver regardless of usecase. In my opinion this is the level of „stupidity“ the world moves to, with not thinking anymore.

Every tool has a sweet spot. If you want the tool to perform well outside of this, you need to „push the right buttons“ and listen/feel for the feedback of the tool.

If you need dead on straight cuts regardless, maybe ty the Mafell P1 with their special blade. It is often touted to be the bees knees.

Or spend a little time with the Carvex, try different speeds and settings and maybe achieve the same. As always, YMMV. Just my two cents.

If you really think the blade is not aligned right, send it in for service.
Sorry for not being more helpful. [emoji56]

Offline lwillis

  • Posts: 5
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #35 on: March 05, 2018, 04:07 PM »
Regarding which blade to use:  I see on previous posts that there used to be a jigsaw blade guide:  http://festoolusa.com/jigsaw-blades , but that's now a 'page-not-found'.   Is there an updated location for that information?

I'm currently using the S 75 / 2.5 blade, b/c Festool describes it as "The jigsaw blade is an excellent choice for fine cutting in a wide range of materials. Precise, clean cuts can be achieved in softwood, hardwood, melamine, veneered plywood, chipboard, soft plastics, ABS, HDPE and similar materials."  (https://www.festoolusa.com/accessory/486963---s-752,525#Overview)

But I see in the manual that is says that one should only use an FSG blade with the guide rail, so maybe that's my issue.

Offline grobkuschelig

  • Posts: 400
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #36 on: March 05, 2018, 04:56 PM »
For straight cuts, I would always recommend the most rigid blades possible.
I really like the FSGs. Have them in 75 and extra long.

Try those and see where it gets you.
There are also some similar Bosch blades available, but I have not tried those yet.

Offline lwillis

  • Posts: 5
Re: Carvex 420 cannot cut straight - Problem Solved
« Reply #37 on: March 10, 2018, 06:55 PM »
Me: "...But I see in the manual that is says that one should only use an FSG blade with the guide rail, so maybe that's my issue."

Yes, that was it.  I switched to a "S 75/4 FSG" blade, and that worked much better.  Crisis averted.

Dear Festool, this really could be much clearer in the manual.   I did make a good faith effort to read the manual, both before I started and after I first encountered problems.

It does say (once) in the saw manual, page 16, in the instructions for the adaptation table:  "do not ex-ceed max. material thickness of 20 mm and always use cross-set saw blades (FSG)"  (emphasis added).

But, as a new user, I had no idea what an FSG blade is, it's not explained in the manual.  I thought FSG was just the Festool brand name for jigsaw blades (i.e. all Festool blades were FSG).   

So I looked thru your online blade guide: https://assets.festool.com/SiteCollectionDocuments/Catalog/Kat_2005/portal_multimedia_download/gb/p2010_broschjigsawbl_gb.pdf and picked a blades that were described as good for mellamine.   There's nothing in the blade guide that says which blades should NOT be used with the adaptation table or circle cutter.

You need a column or a footnote or something in the blade guide to tell people which festool blades work with which festool attachments.

Offline A-Team

  • Posts: 4
New Carvex 420 cannot cut straight
« Reply #38 on: March 10, 2018, 10:09 PM »
Just got a new 420 and the cuts are not at a 90 degree angle. Using the S 75/4 FSG blade free hand in 1 1/2 thick 2x4 pine. Amazed at the speed and power, but the cuts are 7 to 10 degrees off.

I have adjusted blade guide 1/4 turn off tight, pendulum at position 3, speed Auto. After seeing the videos of 4x4's being cut perfectly, I am disappointed.But maybe I'm doing something wrong...