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I have noticed that my wheel bobs up and down if I don't have it completely flat when I slide it on the arbors.  Make sure everything is flat before you tighten the plastic lock nut.  See if that makes a difference

UPDATE:    I have been doing a lot of sharpening and have not taken the stone off of the arbor.  As a result, I am not seeing much if any wobbling up and down.  By taking the stone off to measure it and not having it referenced and indexed, it must have contributed to the stone needing to be graded more often.  I have calipers that can measure the stone without taking it off now.  I previously was using a combination square.  BTW, I love this machine.

Dan

Nice! I'll be there

Thank you very much.  I still have a lot to learn and am loving every minute of it.  Mods, you can take this down if you like.  Unless you think it will be helpful to others.

It is getting closer to true.  I trued it two weeks ago.  While truing it there was an angular pattern for the first third of the stone and then the pattern was up and down for the rest.  With the last pass it seems to have lessened.  Maybe a few more passes with the grader will sort that out.  I also have been taking  the stone off to measure it because I have been using the grind angle software.  I was not paying attention to indexing if the stone as the earlier posters had mentioned.  I've only had the machine for a month and have had to remove a lot of material to keep it true.  I will now do my best to keep the stone indexed to the markings that I had made to see if that makes a difference going forward.  I'm new with this and maybe I need more time.  I'll make a few more passes tomorrow as the vibration is very loud and my 20 month old goes to sleep in a little bit. Thank you all for your help, but it seems like I might just need more time with it.

First of all, thank you for the suggestions. 

I used a punch to make a reference point on the washer and on the shaft.  I marked the end of the shaft and the stone and started to grade the stone.  I am sharing 3 videos of what is going on when I true the stone.  Please let me know if something does not appear to be right.  It just seems wrong.  I'm just chewing through these stones.


Video 1:beginning of the first truing.   https://drive.google.com/file/d/1TC1S6JnczyF-029Urx8HhPSCUidjKgya/view?usp=sharing
Video 2: beginning of the third pass. https://drive.google.com/file/d/1XBG2b6uQJjFtocuJiZH59AdHEX6hvRfJ/view?usp=sharing
Video 3: end of the third pass https://drive.google.com/file/d/1XugW_JfhtHRliEBswsJzQ0TmmrkiOPcZ/view?usp=sharing

I would like to add that I just sharpened a kitchen knife today.  When the blade was contacting the stone closer to the outer edge, the wobble is very noticeable. I can feel the stone pushing the blade up and down.  when the contact area is on the inner side of the stone, it's not wobbling at all. 

I do not currently own a dial indicator, but maybe I will order one.  I will try all of the things you have mentioned and get back to you.  I didn't hear back from the tech support department.  Maybe I will send a follow up later today. 

Thanks!
Dan

Thank you very much.  I will do that.  I'll let you know how it goes. 

Dan

Hello Everyone,
First let me say that as a new Tormek owner, I am in love!  I apologize if this has been covered already, but I didn't find the answer I was looking for when I searched.  I bought a t-4 second hand and it seemed to be working great.  I then noticed that the stone was hopping up and down a little bit so I used the TT-5 and graded it.  I thought that corrected the issue, but I noticed again that it was hopping up and down.  I bought a new SJ 200 wheel and am now noticing the same thing.  I'm thinking the shaft may be bent.   The hop is much more noticeable on the outer edge of the wheel and not the inner edge.  Am I doing something wrong? 
Here is a link to the video:  https://drive.google.com/file/d/1XoFQvyOXGkKPe1iYfEAQzFKZGsiiN86c/view?usp=sharing

Thank you all very much for your help and expertise

Dan