Trouble engraving plaques

[Yewleaf wishes]

I use my router everyday to engrave hardwoods with perfect results. For this I typically use a traditional v bit, either 30 or 60 degree pencil tip.

The plaques I have been having issues with are 7mm x 25mm in size with text around 3mm - 10mm. The material is abs plastic with a metallic coating. I have been using a single flute solid carbide cutter, with a 30 degree and 0.235mm flat tip.

The results I am getting are quite poor. There is a lot of scalloping to the text, despite only using an 8% stepover.

Is the machine I am using just not good enough?

[Martin]

Can you post some pictures of the results you are getting & the tool you are using?

[Yewleaf wishes]

Hi,

Here are some of the results i am getting when trying to engrave the plaques.