Micro EM - Feeds and Speeds

[AM_MCM]

Hello all,

I noticed this topic was covered in a similar post where I originally posted the question, but I don't think many people have noticed it, so I decided to repost a new thread.

I am looking for advice on feeds and speeds for micro end mills. Here is some information I can provide:

1) Roku-Roku HC-548EX - Up to 32,000 RPM
2) Cylindrical die block 5" dia x 2" - 56-60 Rc, S7 Tool Steel
3) Finished part ranges from 0.25"-4"+ diameter
4) Depth of cuts ranges from 0.1"-0.7"
5) Currently using air, oil mister on the way
6) Using OSG Exocarb-WXS cutters - Ball nose, Stub length, 2 flute. Tools sizes:

DIAMETERS - LOC
3.5mm (.1378") - 2.8mm (.1102")
1.6mm (.0630") - 1.3mm (.0512")
1.0mm (.0394") - .80mm (.0315")
0.8mm (.0315") - .60mm (.0236")
0.5mm (.0197") - .40mm (.0157")
0.4mm (.0157") - .30mm (.0118")
0.3mm (.0118") - .24mm (.0094")
0.2mm (.0079") - .16mm (.0063")
0.1mm (.0049") - .08mm (.0031")

I know that's a lot of info, but just wanted to get all the required information for determining this out up front.

We are having success with the 3.5mm-0.3mm, but would like to optimise the feeds & speeds. However, the 0.2mm-0.1mm are the two trouble makers. We've been trying different F&S for these, but getting limited success. If anyone has any recommendations, please let me know!

One more thing; our tools are set by a blum laser and the stock is indicated with a blum probe, both with an accuracy of 0.00001".