General advise needed on CNC Controller and Servo/stepper motor upgrade.

[JAZZCNC]

Jazzcnc, i agree on the motors and controllers as that seems like a fairly elegant solution and the money saved on power supplies is best spent on better motors and controllers.

do you have a schematic for connection of these motor controllers to the UC300 ?

last few days have been a bit of a head scratcher, initally i wanted to use the spares i had and when that went under i felt the centronics boars seemed a good solution however the closed loop board they supply is over £2k so by the time i add a bit of aux io its nice but way to spendy, i did however like the option of adding a linear enc input for additional axis which could have given me closed loop on the steps and feedback from scales on the other 3 axis.

would you say that the uc300 and the nema 34 motors from aliexpress plus mach 3/4 is the way to go ?
as you have done a few of these your experience is way more than mine in this respect.

Ok well you are talking about different things when you mention the Centronics Boar closed loop board.? This will be for a Fully closed loop system back to the controller. This is different to Closed-loop Stepper system which just closes the loop between motor and drive and doesn't feed back to the controller or neither does it have encoder outputs on the drives.
Likewise the UC300 isn't a Closed Controller either so even if you used a Servo system with encoder outputs you couldn't use them.
If you want fully closed loop system you need a more advanced controller and drives that provide encoder output, or use linear scales for feed back.

The connection to the UC300 is simply like any other stepper system in that you feed it Step/Dir signals and Enable, fault connections if required etc.

[Mister Mills]

UC300ETH, UCCNC and BOB ordered and on the way !!!!!!!!!!!!!!. Pretty hard to get anywhere that has stock of them. I ended up going to the Netherlands! (Virtually).

Took the plunge and ordered some HGR Square rail and carriages also My old setup was using round supported rail. Never had any issue with it as my gantry weighed in excess of 70KG. Gravity assist kind of kept things from floating around :) Ooh and emmm some 20mm Ballscrews and bits n Bobs... The 16mm Ballscrews that I had were a bit too short for what I needed.

Dam it anyway.. I promised myself I would not spend any dosh on this re-make of the Big girl. 1k out the door so far and those motors that Jazz sent me the link too will pop another 1500 or so out there too including mounts couplers etc. Once you get the CNC building fever it's hard to stop!!! Now if I could only get this idea of ATC out of my head I might be able to sleep ha ha. Last but not least the 4th and 5th axis. My biggest challenge will be keeping all of this from the missus!!!!!!