First time using the Auto xyz function to zero to my part and size my 3.175mm end mill. I noticed that it measured my end mill size at 3.11mm. But I have imputed my end mill dia in the tool library as 3.175mm in Fusion 360 so converting the file to g code for processing wouldn't that mean my tool path would be off? Should I change the end mill flute dia in tool library to 3.11mm? Thanks
Would be a good to have a second dataset to compare against? Did the puck move slightly during the probe? Is the endmill ground undersized? Steps per mm out? Endmill flute geometry not allowing accurate measurement? A cheap caliper would help For now run the job, compare any measurements after and see if it holds For what its worth, most ali/ebay/amazon bits are indeed ground undersized
Ok really good idea. The XYZ plate to my knowledge didn't move I hold it with one finger. I guess really the .065mm of difference between the 2 probably not crucial. Well its not like I am building a airplane. But I bought this particular end mill from Kodiak Cutting Tools. It was on sale.
I have been happy with their end mills, but if I am not mistaken, mine were a hair undersized as well. In fact most end mills I have are a hair under the stated size except for the ones that cost over $30 per end mill. My solution has been to measure each and us that measurement for the CAM.
I just got my OB Workbee up and working and the undersized bit issue popped up right away. I then thought, "okay, I'll just measure all of them before storing in the DB" and the Freud Diablo 1/2" 90 v-bit ended up being 12.82mm (vice 12.7mm). So that whole measure them first seems like a sound plan. also, don't forget the magnet on the bit/collet...otherwise the Z keeps trying to go down
All the Freud bits I've purchased have been undersized by a lot. Also, get into the habit of lifting the plate up to the bit to verify connectivity. Take a second and besides making sure you've attached the magnet, it will also help you ensure that you've placed the magnet on the flat of the collet nut. If its on the round part of the nut, you'll run into connectivity issues.
The Freud bits designed for CNC are sized correctly (at least the ones I have bought, I only have 3), the generic router bits sizes vary I have noticed, although all of the ones I have at 1/2 shank for big routers to be used in tables generally. Whiteside bits seem a little better in being on advertised size.
