I'm using Enroute 3.0 with the Techno TC 3D driver. 

I'm cutting out a part that was designed with arcs. No straight edges in the design. But, the island fill toolpath uses no arcs...its all linear moves.

How can you force Enroute 3 to use arcs when generating a toolpath. I see some stuff in the Driver set-up area, but not a clue how it works.  I've already checked the box, Use Arcs.

I rough cut at 900 mm/min (35 ipm) with a 1" ball nose. Then, finish cut using island fill, 95% overlap. For the Finish cut, I'm only removing 3~4mm of material, but I can only go about 1000 mm/min, as the x-axis becomes very jerky.

I generate the G-code with the TechnoTC-3D driver for Mach3.
I've messed with the motor tuning and Constant Velocity functions in Mach, but can't get any improvement.

To cut out the bottom of the platter takes about 50 mins. I'd like to get it to half that to make this piece profitable.

Here's a sample of the G-code when the X-axis is jerky. I did some rough calcs and the code runs at about 8 lines/sec. I interpret that as the X-axis needs to make 8, roughly 4 mm moves in one second. Intuitively, this seems like it will be jerky at the feedrates I want to run.

G1X148.2695Y91.7038
G1X151.8169Y91.883
G1X155.0467Y92.0315
G1X155.3119Y92.0435
G1X159.952Y92.249
G1X164.5179Y92.4262
G1X168.5946Y92.5635
G1X172.6548Y92.6806
G1X176.7165Y92.7781
G1X180.7795Y92.856
G1X184.8436Y92.9143
G1X188.9083Y92.953
G1X192.9746Y92.9721
G1X197.0374Y92.9716
G1X201.1038Y92.9514
G1X205.1685Y92.9116
G1X209.2324Y92.8523
G1X213.2954Y92.7733
G1X217.3571Y92.6747
G1X221.4172Y92.5566
G1X225.4939Y92.4183
G1X229.5524Y92.2609
G1X233.6086Y92.0841
G1X237.6878Y91.8865
G1X241.7407Y91.6705
G1X245.7903Y91.4351


Thanks for your thoughts.

Cheers.