I posted earlier about getting a new DeWalt saw under warranty. see here:
http://www.stevedgood.com/community/index.php?topic=20132.0Well I got the box opened and the first thing I did was check to see that the upper harm was straight. It was. But looking at the relationship between the upper an lower blade holder I found them to be out of alignment. The lower holder was to the right of the upper one by at least a 16th of an inch, but closer to 1/8"!
I went online to find a solution and didn't find one. I told my wife I was not going to be sending it back to the service center!!! So I tweaked it a bit here and there and got it pretty darn close. I don't see an issue when it runs and the blade is now 90 degrees to the table.
Now I'm ready to turn it on!
I turn it on on the lowest setting and it is moving very slowly up and down (probably slow enough for Hotshot (Randy)!) As I turned up the speed the steadiness of the slow speed was replaced by vibration between the 4 and 6 setting. Moving on up the vibration slowly dissipated and it was stable at around 7.5 - 8. I am not very happy about that, but I know this is a problem a lot of people have with the DeWalt.
My problem is the speed at the highest mark doesn't seem as fast as I remember on my old saw. There is no way to check it and I couldn't find an answer (or video) online to help me. What I am looking to find out is the speed the saw is actually going! The SPM should be 1750 at the 8 setting.
I need to know if anyone has a way to verify the strokes per minute (SPM) on the saw? If it is accurate then so be it, but if not then I'll have to contact DeWalt again.
![Cry :'(](https://www.stevedgood.com/community/Smileys/default/cry.gif)
AS for the vibration I will anchor it to my bench to minimize it, but I think it wall always be there. Something about harmonics I think. When the saw it going certain speeds it will create this vibration. (This is above my head for physics answers.)
I think I will figure out a way to put shock absorbers under the base of the saw to decrease the vibration.
By the way I can really observe the vibration by extending the articulated air tube away from the saw.
Any ideas for determining stroke speed?
Karl