Help! How to square router with x axis?

[3fingersshort]

Hi. Just noticed when using a large diameter roughing bit that the bit is cutting deeper on one side. When I checked using a bent 1/4" rod in the collet, there was about a 1/4" difference over an 8" diameter circle along the x axis.
What is the best way to correct this? Thanks.

Here's a pic of what I'm trying to say-

If the .25" rod is touching the surface on the right side of the circle along the x axis , its about .25" above the table when its turned 180'.

[romaxxcnc]

Hello,

What material are you cutting and what size "roughing bit"? Which machine is this, WD or HS?

The sweeping test or "tramming" shows that the router is possibly misaligned on the Z axis mounting. Which router, and is this our mount? If it is our mount, there is a small bit of clearance on the mounting holes to adjust with. Not enough to correct 1/4" over 8.0" though. Tramming is something that is done in a mill with an "Indicol" Mill spindles and router spindles are two different beasts entirely. The mill spindle has much less runout, or "TIR". Spinning a wire in a collet with significant TIR, is probably not going to produce any sort of conclusive result.

For there to be 1/4" difference in parallelism of bridge to table surface over 8.0", something would have to be extremely loose or broken. If this is a WD, you can loosen the bolts on the right side of the gantry and adjust the bridge up or down, but there is only .100" adjustment. If it is and HS both sides can be adjusted. We set the bridges here with a digital hight gage, they leave here +/- .002" parallelism from the bridge to the table.

[Nick]

Jul 30, 2010 18:14:23 GMT -5 3fingersshort said:

If the .25" rod is touching the surface on the right side of the circle along the x axis , its about .25" above the table when its turned 180'.

0.25 off? Are you sure you didnt mean 0.025 or something like that? I couldnt even imagine how 0.25" is possible.

[3fingersshort]

Hi. I think what happened is operator error. I drove the router into the work , without it turned on, ;D and as it followed the tool path right, it may have shifted the router slightly in the mount. I'm using a PC 690LR, and it is the factory mount, but I straightened it out and tightened it up, and its good to go.
Thanks for replying, and its a great machine, the operator though could use a little work.

[antennas]

I have a WD-1 can I tram it as well? It is out as a surface tool path left large lines on the surface. Which bolts are you referring to when saying on the gantry?