Sturdy and Fast all Steel CNC , my first build

[Boyan Silyavski]

80V Digital drives and recommend Leadshine AM882

I see that these get more popular here than the geckos. I read some threads here on the forum. I will go with them

3Nm nema 23 motors like these SY60STH88-3008BF

I had my eye on these as a substitute for the ones that i had to buy from abroad and pay duty. I will look deeper in the specs, but most probably will order them through Zappautomation.

70Vdc PSU preferably unregulated toroidal with correct amperage for all motors.

No idea for this one. I should educate my self how to calculate this amperage and from where to get the transformer.

BOB recommendation is difficult because the one I'd recommend and think is by far the best is PMDX 126 but it's expensive. PMDX.COM - Products for CNC and motion control applications

I was looking into this one. For sure i need a board with 2 LPT connections as i need more ports for communicating with the VFD, turning on mist and vaccum and
On my actual small machine i have trip signals from the VFD and power detection which are very handy in real life. And a second BOb af course. So that BOB wins. Actually its not so expensive for what it offers. I spend more money on my 2 boards.

Ball-screws would be 10mm pitch and 16mm Dia for X & Y axis with 5m pitch 16mm dia. Motors would connect to them using 15mm HTD timing belts and pulleys with 1:1 ratio. This lessens resonance which helps on a steel framed machine and it's much more flexible if you ever want better resolution or higher speed has it's easy to apply a ratio with simple pulley change.
20mm Dia 10mm pitch could be used but really not required at this length and would be over kill, would also restrict performance not increase due to extra inertia of larger screw and ballnut.

All the above I've used on several steel framed machines with gantry's approaching 80Kg so know they work.!!

Sorry, i dont understand you

1. 1610 for long axis that moves gantry and 1605 for the gantry / that moves Z/ and 1605 for the z, correct?

2. I buy belts from Belting online. Should i use the minimum sized belt pulley or go a bit bigger for the size of belt i mean? What is the typical size? I cant seem to find the sheet i used for calculating belts. I remember the AT was stronger but a kind of harder. Obviously either way it should be pitch 5, otherwise i have to go with bigger pulleys