600x900 Steel welded router build

[embraced]

Thanks for the suggestions.

For the gantry, i'm going to have it stress relieved and then milled back. For the frame, i'm going to use an epoxy bed - i think that getting the frame milled flat would be very, very expensive.
I'll add some diagonal bracing to the frame too.

As for the ballscrews, I think you're right Jonathan - the critical speed for this design in a 16mm ballscrew would be around 1600rpm. That's probably near the limit of what the steppers can provide.
I will thicken the plate used for the Z axis - I would rather not reverse the rails and blocks.

[embraced]

I've added braces to the legs in all directions.

I've also increased the thickness of the Z axis plate that will have the spindle connected to it. Previously it was 16mm, now it's 25.

[embraced]

I have a question regarding the motor selection:

I have 600W AC servos in my possession that I'd like to use for this build instead of the NEMA 34 motors.
They have a continuous torque rating of 1.91N.m. - and with the 10mm lead ballscrews, I will get 1200N of linear force.

The gantry and all components attached to it weighs in at 100kg. From dual-driving the gantry, the combined linear force of both motors amounts to 2400N.

Is this enough to move the gantry with a reasonable factor of safety?

[Boyan Silyavski]

What is your servo encoder count per revolution?

[embraced]

10,000 per revolution.