Electronics...

[Stiggero]

Hello,

I've been visiting these boards since the last 6 months regularly, and I'm pretty convinced that I'm finally ready to built my own router table.

The design is going to be a basic mobile gantry, 3 axis cnc (MDF based). The design will 20" * 30". I'll use Mach 3 to control it. The problem I'm having is concerning the electronics, like I live in Europe I simply don't have access to the famous Geckodrives

I was thinking of buying here:
http://www.slidesandballscrews.com/ (If you got good alternatifs, don't hesitate posting them)

What I'm thinking of:

Breakout Board:
Uniport (Click for information) ($81.00)

• Five optical isolated inputs with internal power jumpers.
• X/Y/Z/A buffered outputs with 30mA drive capacity.
• Three 16A @ 250V AC Single pole relays.
• Charge pump protection on all outputs and relays.
• USB powered, only consumes 250mA with all relays energised.
• Optional 5 volt power connection.
• LED indicators for power, charge pump, power save and all three relays.
• Uses standard parallel cable and A to B USB cable.

Stepper Driver (3x): ($72.00)
PM752 Microstepping Driver (Click for information)

• High performance, cost-effective
• Supply voltage up to +75 VDC
• Output current up to 5.2A
• Self-adjustment technology
• Pure-sinusoidal current control technology
• Pulse input frequency up to 300 KHz
• TTL compatible and optically isolated input
• Automatic idle-current reduction
• 16 selectable resolutions in decimal and binary, up to 51,200 steps/rev
• Suitable for 2-phase and 4-phase motors
• Support PUL/DIR and CW/CCW modes
• Short-voltage, over-voltage, over-current protections

Servo Motor (3x)
SY60STH86-3008 Nema 23 (Click for information) ($40.00)

• Step Angle 1.8 Deg
• Step Angle Accuracy 5% (full step, no load)
• Resistance Accuracy 10%
• Inductance Accuracy 20%
• Temperature Rise 80OCMax.(rated current,2 phase on)
• Ambient Temperature -20OC~+50OC
• Insulation Resistance 100M Min. ,500VDC
• Dielectric Strength 500VAC for one minute
• Shaft Radial Play 0.02Max. (450 g-load) Shaft
• Axial Play 0.08Max. (450 g-load) Max.
• radial force 75N (20mm from the flange)
• Max. axial force 15N

420 dollar total What do you think of it?

Thank you very much in advance =)

Ps. I wish to add that I have quite some experience using CNC Cutters, laser cutter, prototyping & 5-axis machinery (however I can't program the last one on my own ). A few examples of past work:

[kawazuki]

I ordered my Gecko 540 direct from Gecko for $299 + freight and had it within a week, 3x 3N steppers from the UK - were about £28/each - I know which I'd rather have!

[hemsworthlad]

Buy the uniport straight from Roy the man who makes them, a little cheaper and a very help full man. http://www.diycnc.co.uk/html/uniport.html