HME Technology router NEE AMC-E controller WinAMC software

[artmin]

I pulled the transformer out of the panel hoping to find some specs. printed on it, but unfortunately nothing.

It turns out to be Lintron & from there website I have the following specs: 160VA with an OD of 115 & height of 45. Weight 2Kg

The AMC driver board has +37VD printed on it beside a fuse along with +5VD in other places, so I'd guess a tapped voltage of +37V. Current I don't know.

I'm starting to think that as I'm not 100% sure what I'm doing (more like 50/50 at the mo. :lol:) it might be best for time versus cost, to go for a one box solution.

Trawling through other parts of the forum I see Roy at DIYCNC has a good name. What about this as a 1 box solution?
http://www.diycnc.co.uk/html/cnc_systems.html The 3 axis System without motors Code SYS43CFK £252. I see the supply voltage is 27V though when the steppers will take up to 90V :confused:.

I hadn't clicked that the supply voltage was proportional to motor speed & torque. Holding torque would be more important to me than travel speed. I aim to be cutting hardwoods, MDF & plastics in this machine but I don't know what kind of torque I need. The spindle power is usually my limiting factor as I will probably install a Kress 1050 unless someone can suggest an alternative. The Kress can burn through brushes rightly with a 6mm cutter :twisted:. With the Kress speed control for me would be unimportant as I normally set it manually at the start of each process. I just need an output that I can use to switch the spindle.

[Jonathan]

Since the existing driver uses 37 volts (odd number) you don't want to go below that as then you wouldn't be able to run the machine at the original feedrates. I'd want to use a higher voltage to get better acceleration, particularly as those are Nema 34 motors which will be slow on that voltage.

If you're after a '1-box' solution I could make one for a similar price to the one from DIYCNC, except with the 4.2A, 50V drivers and just under 50V power supply (or the 70V drivers). Plus including whatever else you need, spindle control etc. PM me if your interested.

Why do you say holding torque would be more important than feedrate? The forces on the cutter / machine are tiny when it's not moving! Alternatives to the Kress are the 1.5kW and 2.2kW water cooled spindles on eBay. Not cheap, but you get what you pay for in my opinion ... see recent discussion in other threads.

[artmin]

Why do you say holding torque would be more important than feedrate? The forces on the cutter / machine are tiny when it's not moving!

Just my ignorance! I assumed that when stationary, the motors would be maxxed out to prevent any movement .



Thanks for that link 2e0poz, but he hasn't had a good start on the 'bay. Mind you, ebay can treat sellers like dirt


I'll send you a PM Jonathan

[Jonathan]

Just my ignorance! I assumed that when stationary, the motors would be maxxed out to prevent any movement .

When stationary is the only time the motors will deliver their rated torque, so 1.5Nm. To calculate the holding force you need to know the pitch of the ballscrew and the diameter. For example if it's a standard 16mm ballscrew with 5mm pitch and direct drive gives holding force of about 1880N with your motor, plenty!
(Formula is F=2*T*pi/p where T is torque and p is pitch if anyone's interested)