Vibration with router mounting

[jobole]

I was wondering if anybody has found a way to decrease the vibration that occurs when larger diameter bits are used in the accessory table mounted router. Would be possible to fill the honeycomb underside of the acc. table with melted led or something to ad mass. I find with heavier bits the whole saw really vibrates and can walk things right off it onto the floor.

[venkatbo]

Have read elswhere that this heavy vibration makes the accessory table unsuitable for larger bits. You may want to build a dedicated router table with a torsion box base and mount this accessory as the top of that dedicated router table.

Not of much help on a simpler fix for the problem:-)

/venkat

[bigsteel15]

I was wondering if anybody has found a way to decrease the vibration that occurs when larger diameter bits are used in the accessory table mounted router. Would be possible to fill the honeycomb underside of the acc. table with melted led or something to ad mass. I find with heavier bits the whole saw really vibrates and can walk things right off it onto the floor.

Also make sure you have the bolt attached to the rear rail .

[jobole]

Thanks for the response, I do have the rear clamp in place and everything is snugged down tight. If I drop the motor rpm down it disappears, and dont have room for a stand alone table. I think its the cantelevered support just starts vibrating with nothing to calm it. May try some temp legs on the end as the saw must remain moveable.

[LCHIEN]

Thanks for the response, I do have the rear clamp in place and everything is snugged down tight. If I drop the motor rpm down it disappears, and dont have room for a stand alone table. I think its the cantelevered support just starts vibrating with nothing to calm it. May try some temp legs on the end as the saw must remain moveable.

Well my first thought was about the rear clamp but you do say you have that installed and working.

The next thought is that you say you turned down the speed and it got better which brings up this question:
Normally the router speed is reduced when running large bits. You neither say what size bit you are running and what speed you are running.

If the bit is 1" dia. or smller than full speed (20-23,000 RPM) is OK
for bits 1" to 2" diameter, offhand I recall the speed range should be around 13-18,000 RPM
and if you're running 2"-3" bits then you need to slow down to 8-10,000 RPM.

And you don't say if this is simply running or while cutting, if its just while idling then you'd ought to consider getting a new bit if its that badly out of balance.

[LarryG]

I agree with Loring: it sounds like you're turning the bit too fast (and your own experience with turning the speed control down seems to bear this out).

Safety is the main concern. But if you're getting enough vibration that stuff is literally walking off the table, you're not doing your router's bearings any favors, either.

[drumpriest]

Loring and Larry are correct, you shouldn't be swinging large bits at 23,000 rpm. You are lucky that you havn't been hurt if you have been.

[jobole]

Im at work now so I will check more specifics later tonight. What I recall is the bit is a Freud tongue and grove, its the one that cuts the tongue, however I have had this occur with about any bit with large girth such as door sets, ect. never a raised panel. The bits cant be too large or they wont fit the openning anyway., I'm guessing 1 3/8" to 1 1/2" max, just with large massive cutters.The vibration occurs with 3 different routers with no loads so I pretty much ruled them out and was focussing on the entesion table they mount to as the cause. I dont know the exact speed as I just reach up under and drop it down til the vibration stops, will check more specifics later. I was just hoping adding more dampenning would help the situation, since Ive noticed many table saw manufactorers table saw router mount wings seem to be cast iron and thought adding some weight to the Ryobi would help.

[jobole]

I was running too fast

Upon further investigation I was probaly pushing the saftey limits with my settings. All the bits causing vibration were indeed in the 1.75" - 2" range. By slowing down the router to a speed of 16,500 all the vibration disappeared. Thanks for the heads up on the speed recomendations. Now my can of pop will not land on the floor.
Joel
ps I would still like to know if the underside could be filled with lead.

[ElRay]

ps I would still like to know if the underside could be filled with lead.

There was a thread on the old forums about filling the groves in the handle with epoxy and lead shot (or maybe it was fishing sinkers).

Ray

[sacherjj]

Here is the thread I started on the handle fix. I have a web page linked off that thread that would be nice as an article here, but Sam was swamped when I tried to make that happen.

You could use the lead shot and epoxy to add mass to the accessory table, but be careful not to overstress the rails.