A new hope: Epoxy granite and steel.

[Doddy]

Link to information that recommends a DC power supply for the servo driver?

[hardenum]

Link to information that recommends a DC power supply for the servo driver?

No such thing, it was my assumption, so in other words I don't need any PSU at all, just plug the drivers directly to mains?

[Doddy]

Read the specification for you selected drivers.

You will always need part for control logic, switching etc., but if you have mains driven servo drivers then this would be a much smaller power supply, at lower voltage and power.

[hardenum]

You will always need part for control logic, switching etc., but if you have mains driven servo drivers then this would be a much smaller power supply, at lower voltage and power.

ah, that makes sense, okay, thanks.

[jarjar]

Some servo drives need only a AC supply, others need AC + 24V DC for the control logic.
In all cases you will still need a DC supply for the motion controller and other things. Basically a small switching PSU like this: https://uk.rs-online.com/web/p/din-r...plies/0428477/

[hardenum]

gone

[pippin88]

Why direct drive?

Won't it be much harder regarding drawbar etc?

[hardenum]

gone

[pippin88]

It's a gantry style with a lifting z axis, no way to do belt drive the traditional way.



There are dedicated direct drive cartridges that have a hydraulic thing that moves the drawbar like these:
https://sc02.alicdn.com/kf/HTB1l9RHX...XXaC.jpg_.webp

The thought of modifying a $500 belt drive cartridge into a direct drive with a hydraulic drawbar fills me with excitement.

I don't understand why you cant have a belt driven spindle. Just put the motor beside or in front of the spindle instead of behind.

I'm not saying direct drive is a bad idea. I just suspect it will be difficult dealing with drawbar issues etc

[jarjar]

The Z looks complex. I assume you have a complete machine shop to build it. Ideally it should be as wide as the gantry carriage.

I would go fixed gantry for the relatively small working area you planned.

Maybe also consider simplifying the shape of the columns, but in the end you'll be the one to build the molds :)