Replies

1. 
   rwjiudice | Dec 23, 2006 11:11pm | #1

   I have a DJ15 so I suppose the DJ20 is similar. The beds are supported with eccentric bearings (bushings). You can easily adjust them by loosening the set screws (from the top) then rotating the bearings (4 in front - 4 in back). That's one of the advantages of a "paralleloram" type jointer .

   Just loosen / adjust EITHER the 2 front or two rear bushings for the outfeed table by rotating the bushings.

   NOTE: There are 3 critical measurements:

   1- out table flat

   2- intable flat (parallel to out table,

   3- FINALLY Blade hight parallel to both tables.

   You  are trying to make the outfeed table co planar with the infeed table. If both are already coplanar, then adjust the KNIVES to the tables. Otherwise you'll just go nuts chasing your tail.

   MARK THE START POINTS FIRST so you can see how far you screw them up - and start from scratch again!!!!

   Easily adjusted, tough to align properly..... I spent an afternoon doing this

   ---

   Edited 12/23/2006 5:34 pm ET by rwjiudice

   
   

   ---

   Edited 12/23/2006 5:43 pm ET by rwjiudice

1. 
   eddiefromAustralia | Dec 31, 2006 05:11am | #12

   HI Graham,There's a fourth critical parameter, especially if you're using Tersa knives.The initial setting you need to worry about is **make sure that the outfeed table is parallel to the cutter block**Then continue as per post 2.The proof of the pudding is in the tasting. If the thing joints flat, you've got it set up fine.Cheers,eddie

2. 
   RickL | Dec 24, 2006 02:45am | #2

   You will need a machinist straight edge to do it best. Also watch out on the setscrews. All the ones I've adjusted had double setscrews...meaning you remove the top one completely and then you can loosen the one underneath that locks the cam adjuster. If you don't do this you risk scoring a groove in the adjustment cam.

   It's a bit tricky to adjust for the first time. Changing one corner of the table affects the opposite corner. I've adjusted DJ15's, DJ20's, DJ30's and a slew of other jointers over the years so I have the proper tools.

   I wouldn't think it would affect the warranty. I'm guessing you didn't buy it from a local dealer with service. .004" is pretty small and might be considered within tolerance by Delta. I know that if your table had a dip this small it would be considered acceptable.

   Are you geting unacceptable results trying to joint boards??? You should, if careful be able to tweak that one corner without having to do the other corner and get it within .001".
   Did you use a feeler gauge or dial indicator to do your measuring????

1. 
   Graham-Dragushan | Dec 24, 2006 09:40am | #3

   Thanks for the info!  I found the double set-screws...  I'd heard about that, but couldn't "find" the second screw - until I discovered it under the first - felt like an idiot!!

   I now have the two tables within a tousandth or so...  I need to re-set the knives before I know how this turned out.  I used a 24" machinists straight edge as you suggested, and two sets of feeler gauges - one with ground double-measuring leaves, and a set from Lee Valley that starts at .001 - that is one delicate leaf! 

   Interestingly, the second set-screws were all loose when I got to them.  I could never figure out why the darned machine kept changing its cutting performance.

   I am grateful for your assistance all!

   Graham

1. 
   RickL | Dec 26, 2006 04:38am | #4

   Interesting how the bottom setscrews were loose. Well considering how many jointers they make it's not unusual to find a glitch now and then. Perhaps it was being set between a lunch break and they forgot to tighten them. I was pretty sure they were still using the double setscrews. I've adjusted a few recently and they were still there. Good thing you found them or you would have scored the cam adjusters up. In the future if you really had a table off a 24" straight edge isn't really long enough to do major adjustments. I have a 48" straight edge for small jointers and a 72" straight edge for the big eight foot beds, both Starretts.

2. 
   PatCap | Dec 27, 2006 02:15am | #7

   Hi Rick, I also have the DJ-20 do they all have 2 set screws? I loosened one set screw and I didn't see a second. Also are the adjusters suppose to move easy? I had to tap them with a screw driver, I hope I didn't ruin anything.

1. 
   tinkerer2 | Dec 27, 2006 07:43am | #8

   You might have lost the outside set screw.  I think one poster said his were loose.

2. 
   RickL | Dec 27, 2006 03:30pm | #9

   Over twenty years all the DJ series I've worked on have double set screws. The hole is pretty deep to fit two setscrews so it amy not be seen unless you shine a light in there. Put the allen wrench in the hole after you take the top setscrew out and it should engage in the hole. The cam should move fairly easy. If you have to really pound it with great force it sounds like the second setscrew is engaged. There are special wrenches available called spanner wrenches. I typically use a pin punch with a modified slightly rounded tip. A screw driver would not be my tool of choice.

3. 
   rwjiudice | Dec 27, 2006 06:12pm | #10

   Like Patcap said.....

   You said you "loosened" one set screw....? You have to completely remove the first to see .... feel the second.

   Once the second set screw is loose, the bushing rotates pretty freely...

1. 
   Graham-Dragushan | Dec 31, 2006 04:56am | #11

   Regarding the capscrews (I've had to readjust the allignment - sigh), on the first go-round, I tightened the lower screw first then the second one about the same...  then on removing them, I found the lower one loose, as I did the first time.  I suspect that loosening the top one also loosened the lower one.<!----><!----><!---->

   This time, I tightened the lower one fully, but just snugged the second in place sufficiently to lock it in place.

   Also, I found the bushings quite stiff...

   Now, with everything adjusted, the machine is cutting like a dream.

   <!----> <!---->

3. 
   BigK | Dec 26, 2006 04:16pm | #5

        You should contact Delta and request instructions for 8 way alignment for the infeed/outfeed tables of your DJ-20. They will send the instructions free of charge. I don't understand why these are not included with the owners manual.  I had to do this for my DJ-20 when I first got it, made all of the difference in the world. You will need a good straightedge and a set of feeler guages, and a bit of patience as this is a fairly persnickety process but the results are worth the effort. Good luck.

4. 
   PeteBradley | Dec 26, 2006 05:17pm | #6

   You can probably adjust some of that out, but in use, you're never going to notice .004 across an 8" jointer.

   Pete

   
   

   ---

   Edited 12/26/2006 10:25 am ET by PeteBradley