OF1010 : axial runout

[kiaora_]

Hello,

I have a problem on a Festool OF1010 EBQ router, the axis does not turn round. I would like to know if you have already noticed this kind of problem or if it can come from my router.

It is while machining an MFT plate and its network of holes that I realized the problem. To make my MFT hole pattern as "square" as possible, I use the centering cone to position the copy ring, but despite that and a flawless jig, I still had a squareness error after a few rows of holes.

I did some "precision" measurements as I could, I share with you some pictures, basically I have a 0.3mm runout at 30mm from the collet, which means that my centering cone doesn't allow me to place the copying ring properly.

Have you ever encountered this kind of problem with your Festool routers? I hesitate between replacing my OF1010 or changing brand...

Thank you !

 

[guybo]

Hi, welcome to the fog,Iwould get a dial indicator and measure @the shaft w/o the collet that will say the shaft is bent,just a guess it's a bad collet,thread,etc.A bad reading @ the shaft greater than.002.bad bearing or some other looseness.

 

[tsmi243]

Agree w/ Guybo. 

Clean the collet and the taper bore, reassemble and try again.  Way more likely just dust than a spindle or taper issue. 

If you had bearing problems, you'd hear them when it's running. 

 

[kiaora_]

Thanks for the welcome

Yes, I also had some doubts about the collet (8mm), it has already been well used and has some wear marks, so I tried with a brand new 6mm collet and I also have the axial runout, but weaker (0.12mm).

I'll try to find a decent dial comparator to mesure the shaft only and clean the tapper bore.

I really don't think it's a bearing problem, I don't have any play in the shaft.

 

[luvmytoolz]

I also wouldn't be counting on the cone being perfectly machined. Once you've cleaned the collet and nut and re-assembled, I'd stick in  a straight cutter and measure against the shank as close to the collet/nut as possible to avoid errors to see what you get.

 

[guybo]

thanks for the correction not bad bearing ,bearing wear.

 

[Crazyraceguy]

It is also possible that the motor shaft itself is bent, less likely, but possible.
As far as the squareness issue, this really shouldn't be affecting it. "Run-out" will make your holes bigger, but they will still be centered on the axis of rotation. If you keep the handle of the router oriented the same way every time, that won't affect it either. The bushing/collar may be off slightly, but it's off the same way through the whole process.
That said, I would still look into fixing it. Do the checks that the others have suggested, replace the collet if needed, and if it is indeed bent, send it to Festool service. They can definitely fix it.

 

[kiaora_]

It is also possible that the motor shaft itself is bent, less likely, but possible.
As far as the squareness issue, this really shouldn't be affecting it. "Run-out" will make your holes bigger, but they will still be centered on the axis of rotation. If you keep the handle of the router oriented the same way every time, that won't affect it either. The bushing/collar may be off slightly, but it's off the same way through the whole process.
That said, I would still look into fixing it. Do the checks that the others have suggested, replace the collet if needed, and if it is indeed bent, send it to Festool service. They can definitely fix it.

I thought that too, but on further reflection it is not the case:

I use a machining jig that allows me to machine a row of six holes, using previously machined holes as reference. I agree with you that on the jig row, no matter what the centering between the motor axis and the ring axis is, if we maintain the same router position, then yes the spacing is good.

On the other hand, when you change row and use the previous holes as a reference, then the whole row will be shifted by the distance between the ring axis and the motor axis... multiplied by a dozen rows, you can quickly reach important shifts.

 

[Crazyraceguy]

[member=77691]kiaora_[/member]  I can see that referencing the previous holes would be a problem.

 

[kiaora_]

I cleaned everything up and redid some measurements with more serious measuring tools at work: Mitutoyo dial with a resolution of 1 µm, here are the numbers:

the centering cone is off by 0,12mm
the router axis has an axial runout of less than 0.002mm
the collet generates an axial error of 0.15mm

I will replace the collet and try to rectify the centering cone...

Thanks for your help.

 

[Crazyraceguy]

You really should have started with that last pic  [eek] That collet is shot.