[Eldon_Joh]

i converted my taig to 3mm pitch ballscrews and 120IPM is the new maximum. the 8 mm diameter ballscrews are only rated to 300 lb force so i'm scared of breaking them.

[Bob La Londe]

i converted my taig to 3mm pitch ballscrews and 120IPM is the new maximum. the 8 mm diameter ballscrews are only rated to 300 lb force so i'm scared of breaking them.

300 lbs is a lot for a Taig. It should be fine.

[dazp1976]

Not fast enough! 80ipm reliable rapid moves which was a little disappointing. Got some resonance which isn't helping things.
Only have 3000rpm max spindle so limited to around 20-24ipm cutting with a 8mm 3 flute anyway (esp slotting).
If it makes any money it'll be spindle and servo upgrades first.

[shujaa]

Hi
I am still thinking, if doing 3 D work , how fast is it possible ?

[OlfCNC]

Hi
I am still thinking, if doing 3 D work , how fast is it possible ?

High acceleration is the important for 3D work. If your machine velocity is fast, but can accelerate the axes up slowly then it will be still slow with 3D work because it can't accelerate up and down in time to reach the programmed feedrates.

[shujaa]

SoWell the more is better but for such 3d workwhat should be the target acceleration range.....say 300mm2/min or 600mm2/min...
Any guidelines keeping in view practicality. Although i would love accelerations of a F1 race car.

[dazp1976]

Not fast enough! 80ipm reliable rapid moves which was a little disappointing. Got some resonance which isn't helping things.
Only have 3000rpm max spindle so limited to around 20-24ipm cutting with a 8mm 3 flute anyway (esp slotting).
If it makes any money it'll be spindle and servo upgrades first.

This is where I'm glad I went overboard for Nema34's on my PM25 clone.
At 400rpm (2000mm/min) the torque figure is almost identical to the Nema23 motor from a similar model line.
When it comes to acceleration though it's a fairly big difference so far.
Haven't got round to do that much testing yet with tuning to find it's stall point.

[dazp1976]

This is where I'm glad I went overboard for Nema34's on my PM25 clone.
At 400rpm (2000mm/min) the torque figure is almost identical to the Nema23 motor from a similar model line.
When it comes to acceleration though it's a fairly big difference so far.
Haven't got round to do that much testing yet with tuning to find it's stall point.

A little update.
Dumped the X,Y nema34 1080oz motors.
Swapped for nema23 566oz. Kept it as a 60Vdc system.
Rapids up to 2500mm/min (98ipm), very smooth and it could easily do more.
Acceleration went up to a setting of 3000 without issue. Seems limitless atm.

Still not the fastest cutter with it's 3000rpm spindle limit. Should be much better when the servo goes on.