[Wiggles84]

Has anyone tried the MX3660 from Automation Technology INC?

Look's to be a lot of bang for your buck:
*three motor driver @ 6.0A
*BOB
*Speed control output (0-10V)

Cost:$260

So to get close:
*3 X KL-8056D = $300
*C10 BOB = $28
*C6 Speed control = $37

Total: $365

Plus the MX3660 would be less wiring, so cleaner install.


Thoughts?

Andrew

[hoss2006]

No but that's definitely going on the recommendation list now.
No wonder I missed it since he has it mistakenly listed under gecko drives.
That should be a real winner, I think I'm going to get one for the lathe project but it would be perfect for the g0704 too.
Hoss

[Wiggles84]

It's also under the digital drivers too. Now I just need to see if I have enough in my Paypal to get my G0704 under power! It's nowhere near ready to make cuts, but to see it move around under power would feel like I've some progress.

[Fastest1]

I have one on the way for my DM3000. It shipped today. 55v power supply too. I had ordered mine thru Arturo @ CNC4PC last week.

[Fastest1]

Attachment 209518
Attachment 209520
It's here! Just waiting for my power supply. Though I do have one I could use for testing.

[systemslave]

I am playing with my MX3660. It takes up a lot less room than 3 KL-6065s and a C11 BOB. It has extreme micro-stepping resolution (up to 12800 steps/rev.). I am having trouble right now with power on the outputs though. It has four outputs associated with pins 1,8,9, and 17. I have pin 17 set to spindle on. I test the unit under EMC2 with the spindle off and with the spindle on. No voltage on output 1 (associated with pin 17). I noted someone on a Mach forum with the same problem. Anyone know what we are doing wrong?

[Fastest1]

Hopefully these are not issues we are all about to experience. I can't wait to start configuring mine. The size is impressive and the fact it already puts out the 0-10v for my Bardac eliminates 1 more piece of equipment from the loop.
Fortunately I am in Costa Rica on vacation and can't tinker. I would have said unfortunately but anyone who has ever been here would know I am lying.

[luv2ride]

I'm very interested to know how these work out as I'm ready to order electronics. I don't want to be tinkering with these all of the time though.

[Fastest1]

Shouldn't need to do anything but an initial set up just like any combo.

[systemslave]

As Fastest1 said, I would expect the outputs to go active when pins 1,8,9,& 17 go high. There shouldn't be tinkering.

Shouldn't need to do anything but an initial set up just like any combo.

[Wiggles84]

Just want to give an update to anyone that finds this thread.

I did get an mx3660, and it has done all that I have expected and more. The one thing that most are getting hung up on is there is no internal power to the spindle control. I was able to pull power off of my KBMM-125's P1, P2 & P3 pins and use the mx3660 like a manual pot. My spindle motor is not changing speeds in a linear fashion, but that's no fault of the MX3660.

So currently I'm using three 570 steppers set to 1/8 microstepping, at the max amps, the KBMM-125 on the spindle control, I have three limit switches on the way (IP65 rated), a ESS to help with the computer issues I'm having (all three motors stalling at the same time) and of course an estop. There will be a relay connected to one of the outputs at some point for flood coolant.

So just to recap, Great little box so far that really makes getting a machine running quickly and with very little mess.

Andrew

[Fastest1]

Did you delete your existing linearity.dat file?

[Wiggles84]

Did you delete your existing linearity.dat file?

Kinda? I moved it to the desktop.

I get my half speed close, about 50 RPM off. but anywhere in between is off like 200 RPM and lower that half drops off like crazy!

I think its just the treadmill motor I'm using.

If I got the rpm sensor from vistacnc, could I get the spindle calibrator program to figure out the right volts for the S command?

Other wise I'll just start typing in S commands until I get the desired speed and make a cheat sheet for programming.

Andrew

[mrosso]

What fuse did should you use for the DC in for the MX3660? I can't find anything in the manual that says what amp rating should be used. Should I use 6AMP or 18AMP or ? I'm planning on running 2 x 570 motors on X/Y and a 1200 Nema 34 on Z.

[SSPW]

I have a MX3660 setup running on Mach3. I have wired up a 10V power supply to the spindle control analog out. I get 8.8V mach on speed signal.
Reading manual and post here, i see Mx3660 will always loss 1.1V for V+.
So if my VFD expects a POT, and manual say 0V = 0rpm, 10V is max rpm, wont my spindle only every get to 88% speed?
Anybody else having this issue?

[bwthor]

I have a MX3660 setup running on Mach3. I have wired up a 10V power supply to the spindle control analog out. I get 8.8V mach on speed signal.
Reading manual and post here, i see Mx3660 will always loss 1.1V for V+.
So if my VFD expects a POT, and manual say 0V = 0rpm, 10V is max rpm, wont my spindle only every get to 88% speed?
Anybody else having this issue?

I'm having the same issues with an MX4660. Did you ever find a solution? I'm hitting about 21480 max RPM's from my 2.2kw spindle. Running it manually, I'm getting the full 24000, and these speeds have been verified using a digital tachometer.