Domino Parallel Joining - Help with vertical alignment of mortises

tpotter19

Member
Joined
Sep 6, 2011
Messages
2
It took me a while to make the decision, but as of this weekend I am an owner of the Domino.

My first few joins were a bit frustrating.  The major problem I am having is vertical alignment issues.  My procedure is as follows (i.e. parallel joining with 5/4 red oak with #8 dominos).  Lay both boards next to each other, line them up, and draw a line accross the face of each toward one end.  Then, start at the reference side (the side with the line) and make my first plunge.  Then, based on my cross-stop settings, reference off the last mortise and work my way down the board.  I would apply pressure downward on the fence handle and plunge by pushing in at the back of the machine where the cord is making sure not to plunch too fast.  I would repeat the process for the matching board (except start at the other end).  All of my cuts were with the fence on the good face of the board. 

Results: As far as horizontal alignment (right to left) they lined up great because I had room to shift them a little (first plunge at narrow width and each one after the first was a little wider).  However, I was getting a varied degree of height issues.  At one end the boards were flush as I ran my finger accross the top, however, in the middle they were off about 1/16 of an inch and on the other end they were off 1/16 in the opposite direction.  I had the boards clamped down to my workbench for each of the cuts and I applied ample/consistant pressure during each cut (at least I thought I did).  I tried this a few different times and there was always a little variation (more than acceptable) during each join. 

Has anyone experienced similar problems when you first started using the domino and what did you do to fix the issue.  I would rather form good habits in the beginning so any advice would be appreciated.  Not to mention, I would prefer not to use my planer after each join :)  I'm sure it is user error and not the machine. 

Thanks.
 
First,   [welcome] to the FOG!

I certainly found that the Domino had a learning curve for me.  In my learning curve I found that occasionally when plunging the base of the tool was actually riding on the work surface and when applying force to the front handle I was tilting the machine just so slightly and then causing height matching issues.  It would be fine in some places (where the piece overhung the workbench) and then problematic in others.  I also found that feed rate affected the parallelism of the domino to the top edge.  Too fast and it would be tilted for me.  Slowing down the plunge rate helped me out.

You might want to check to see if the same problems I had might be similar to yours.

Peter
 
Like Peter stated, there are a couple of things to check:

- Make sure the bottom of the Domino is not coming in contact with a work surface. This can make the machine reference off of its bottom rather than the fence.
- Keep firm, steady pressure on the handle of the fence and plunge smoothly
- Plunge rate can be a factor in some cases. There's an image on the forum here somewhere that has recommended plunge rates, I'll find it and add it back to the post.

We're only a phone call away. I would encourage you to call and speak to one of our application specialists to get help if you need it.

Shane Holland
Festool USA

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What's the recommended way to grab the Domino and a stopwatch?  I like being exact and Mississippi is way over used.
 
Ken Nagrod said:
What's the recommended way to grab the Domino and a stopwatch?  I like being exact and Mississippi is way over used.

With your hands.  [big grin]
 
Thanks for the suggestions!  I will run some more attempts later and see what the results are.  I'll make sure to clamp the wood to overhang the edge of the bench slightly and that I plunge at a slow pace. 
 
tpotter19 said:
Has anyone experienced similar problems when you first started using the domino and what did you do to fix the issue.  I would rather form good habits in the beginning so any advice would be appreciated.  Not to mention, I would prefer not to use my planer after each join :)  I'm sure it is user error and not the machine. 

All of us have had the same problem and it's ongoing.  I think it's inherent in the nature of the technology.  Because the bit is rotating parallel to the plunge it sometimes wants to climb.  You don't get that too much with a biscuit jointer because the rotation is perpendicular to the plunge. 

The best habit you can form is to get RonWen's Domiplate.  It's found on this thread.  It pretty much fixes the problem you're having.  Check out the testimonials in the thread, people love it.
 
tpotter19 said:
Thanks for the suggestions!  I will run some more attempts later and see what the results are.  I'll make sure to clamp the wood to overhang the edge of the bench slightly and that I plunge at a slow pace. 

Hello, Mr. Potter, and welcome.  I think you're on the right track--please let us know.

By the way, Shane is serious when he says "we're only a phone call away."  Definitely take him up on it if you can't get the tool to work to your satisfaction.  When I bought my first festools back in '03 or '04, one of them (an AT-65 saw) had a defect that wasn't apparent.  After we weren't able to figure out a solution over the phone, Festool let me know when one of their reps would be visiting a local store.  I stopped by, he spotted the problem right away and the tool went back to Festool for an exchange.  But that wasn't all.  The rep also taught me a bunch of tips for using my Festool jig saw and router, and with the benefit of his help, I went from being a "somewhat satisfied" Festool customer to a "very satisfied" Festool customer.  I'm confident that you and anyone else will be just as satisfied if you take advantage of the support this unique company offers.  Best of luck to you.

Regards,

John
 
I have a few suggestions for you.

First, put the cross-stop accessory to one side whilst you get up to speed with the basic machine. I find it is easy to get confused with the cross-stop and start mortising in the wrong place. I have referenced off the wrong end of the wood using this accessory more than once.

Second, regarding vertical alignment, are you using the preset stops or the ruler on the side? Just make sure that if you are intending to use the presets, the face is resting on the stop. Loosen the cam, raise and drop the face, and then tighten it again.

Third, with 5/4 stock you are not in danger of referencing off the bottom of the Domino instead of the wood which is a common beginner (and sometimes advanced user!) mistake. But you may be tilting the machine when mortising which is allowing the bit to enter the wood higher or lower than desired. More likely higher than lower in fact. You may be allowing the back of the machine to drop. The solution to this is to press firmly down on the handle on the face plate with one hand and hold the domino at the back of the machine with the other (by the plug-it cable). This will give you a more balanced and supportive grip and enable you to plunge forward directly.

Hope this helps
Richard.
 
... and relax. A steady but easy hold and plunge seems to work best. Can't even imagine counting the seconds. Hand on the plate, hand around the body near the plug and ease it in. (NO WISE CRACKS NECESSARY  [wink] - I know you want to  [big grin] )

Also - in my case - I found that I need to set my plate very carefully with the stop down at one end and measuring with an incremental steel rule or digital calipers at the clamp end. Every time I casually tighten the clamp I get some run out from the stop edge, so I take the time to measure and clamp. This can be frustrating but I get perfect - certainly acceptable - alignment of my faces for my efforts.
 
I would also suggest getting into one of the Festool classes, you'll really get up to speen on the Domino
 
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