Stell frame cnc 1500X1000. Adjustable table your opinion please

[ba99297]

Big restart after 4 year
This is the second BIG RESTART on a project from 2014. I hope that this will be the last restart
Glad to be back to mycncuk. I have this project running since 2014.
In my last post back to 2017 I was “epoxy leveling” the gantry
Epoxy correct most of the error BUT checking the carriages with straight edge I found out that the rails are twisted (I don’t know if my English are correct). So shims should be used.
I wander if everyone that uses epoxy method ever check the machine against straight edge?

It was a painful process but I learned a lot about shimming
Some photos of my progress till now




Just to remember some basic specs of the machine
Cutting Size 750X1200
Ballscrews x,y axis 2010 z axis 1605
Gearing 1(motor):2(ballscrew)
At first I was planning using three motors (one each axis X,Y,Z) so I bought a set of three Yaskawa servo motors 400 watt, one of them with brake. After many suggestions and advices I finally bought another 200watt Yaskawa for Z so I have
2 X400 watt for x axis (long)
1X400watt (the one with the brake) for Y
1X200 watt for Z
Here is a picture of the motors


My main concern is if 200 watt servo with 1:2 gearing and 1605 ballscrew is enough to handle z axis that is nearly 25-30 kgr (assuming that gearing and ballscrew pitch will 4X the torque of the motor)
Last days i work on attaching the ballscrews so I can mount the motors and see what pulleys and belts I have to order (htd5 15mm wide). Are the Chinese ebay pulleys ok? Do you have any reliable supplier. Do I have something to be carefull. Here is my last progress





So i repeat my questions
#1 Is 200watt servo enough for z axis
#2 Pulleys and belts.a) What to be carefull about, b) reliable supplier

Thanks for your time
Vagelis