Question about pocket cuts

[signtist]

I do a lot of pocket cuts with a 1/8" or 1/4" end mill. I cut a lot of HDU foam signs. I cut at 4 ips. The little problem I'm having is the cut leaves some different depth cut marks that are sometimes difficult to sand out because its close to the raised letters and scrolls. I cut with the raster so it is at least horizonal.
Is there something else I could do to make a better, smoother background? Sometimes I put a V Carve woodsie texture in it.

[Gary Campbell]

John..
Others have had the same problem..see this post:
http://www.talkshopbot.com/forum/messages/26/25923.html?1198106345
Even tho your sign foam cutting may not develop much side load on the bit, you may be having some of the same problems. We solved ours with a tuneup up of all the Z motion components.
http://www.talkshopbot.com/forum/messages/26/26324.html?1198025229
Hope some of this helps.
Gary

[gene]

Fred at centurion sells a 1/4 " compression bit that has a bottom set up for dados, it does very good and is under 20.00 ... i use it for cutting cab ends with dados and cutting out the whole piece so i dont have a bit change