Pm-940m-cnc (pre-assembled)

[phazertwo]

And this is repeatable on all 3 axis??

I assume you're talking about my statement on the buffering time vs accuracy. So far yes, it is repeatable on all 3 axis. I only tested for ~5min but every time I sent it to a random x,y,z position running a low buffer time it would get there within 0.0001". The further I cranked the buffer time up the larger that 0.0001" got. I probably won't have time to do more testing until Wednesday night, I will post up more results.

HOPEFULLY I can actually run some g-code on Wednesday (just a marker in the spindle)!

PZ

 

[cut2cut]

I found the problem that was causing me "hiccups". Fusion 360 created some VERY strange G-Code... Note to self, always check the G-code for anomalies if the mill is acting strange during a job. So I edited my above comment that pointed the blame at the 940cnc 2017 revision USB controller hardware Nevermind....

Also, briefly I just tried a newer i5 64 bit computer with a fresh install of windows 7 professional 64 bit and downloaded and installed a demo copy of Mach3. Seemed to work quite well and while using the default buffer size in the nMotion plugin configuration settings.
I tested the g-code that hiccuped, and also moved the x and y around after zeroing, and then used the G0X0Y0 command and it landed at .0000 or .0001 every time.

Jake

 

[phazertwo]

I found the problem that was causing me "hiccups". Fusion 360 created some VERY strange G-Code... Note to self, always check the G-code for anomalies if the mill is acting strange during a job. So I edited my above comment that pointed the blame at the 940cnc 2017 revision USB controller hardware Nevermind....

Also, briefly I just tried a newer i5 64 bit computer with a fresh install of windows 7 professional 64 bit and downloaded and installed a demo copy of Mach3. Seemed to work quite well and while using the default buffer size in the nMotion plugin configuration settings.
I tested the g-code that hiccuped, and also moved the x and y around after zeroing, and then used the G0X0Y0 command and it landed at .0000 or .0001 every time.

Jake

This is good to know. I have a much better computer just sitting around that I can load XP on and give Mach 3 another shot, hopefully with a smaller buffer. I'll have to start the install process tomorrow and see how far I get.

PZ

 

[phazertwo]

Made my first chips last night! Didn't take a picture because there wasn't really anything to take a picture of. I simply ran G1 codes around a block of aluminum for no reason other than to make some chips and say that I used my mill!

Hopefully I will get a little bit of play time over the next few days and actually cut something out.

PZ

 

[rodjava]

Ok, sorry for the delay. Here are the pendant pictures I promised.

I'm still getting the software configured little by little. A fellow pm-940CNC owner has helped me test the spindle, and also showed me some wiring for things like the coolant pump that were not designated anywhere.

X Y and Z function so far, so the new controller appears to be functioning.

So far I love the rigidity and smooth ground ways. I have yet to check for backlash and such, but the fit feels good so far. I do have a knocking sound in the Z that I need to inspect. I believe it has to do with the slop in the hand crank gear interface with the ball screw...or possibly the screws holding the ball nut are not tight. If it is the hand crank slop I'll probably remove the hand crank assembly entirely, unless it serves to keep the head from creeping down on its own weight ?

Cheers,

Jake

View attachment 225057View attachment 225058

Jake,
I'm trying to figure out the wiring for the coolant pump too. Any pictures or info how the 3 wires connect to the pump? I emailed Matt, but it's Sunday.

Rod in San Francisco

 

[cut2cut]

Jake,
I'm trying to figure out the wiring for the coolant pump too. Any pictures or info how the 3 wires connect to the pump? I emailed Matt, but it's Sunday.

Rod in San Francisco

I haven't actually wired it but I asked a fellow with the 2016 revision of the pm 940-cnc' if he could send his wiring. I don't recall if the terminal block looks exactly the same but here is what he sent me.
If you get yours wired up and working please send a picture of your pump wiring !

Jake

 

[cody.williams]

Hey Guys

So long story short, I'm a new employee at a small lab. They had purchased a PM-940M a few years back and never had it set up. This past week I have been in charge of setting it up. I've been able to get the mill to jog in all directions but I have not been able to get the spindle to turn at all. I've tried everything listed in this thread, but without any luck. I did notice the VFD throwing a AErr code which directed my to check the ACI Wiring. I checked the M1 and M2 wires and everything seemed fine, still getting the error...

I also have been having problems with the physical E-Stop Button. It is wired to I11 on the JNC-40M motion controller, I have the input mapped to 11 on Mach3, yet in the diagnostics page when its pressed Output 3 starts flashing.

I am new to this CNC thing and at a complete loss. Any and all suggestions will be appreciated

 

[cut2cut]

I don't have the older controller so I doubt I can help you Cody, however I've recently converted my mill to use Linux CNC which required new electronics / controller, so if you ever need or want to swap out for the latest ( 2017 revision ) controller for the pm940 cnc , I will be selling my factory nMotion controller with pendant.
I also am going to belt drive and in the process will have the spindle motor for sale too. For anyone interested, I suppose it's best to send me a private message.

Jake

 

[phazertwo]

I don't have the older controller so I doubt I can help you Cody, however I've recently converted my mill to use Linux CNC which required new electronics / controller, so if you ever need or want to swap out for the latest ( 2017 revision ) controller for the pm940 cnc , I will be selling my factory nMotion controller with pendant.
I also am going to belt drive and in the process will have the spindle motor for sale too. For anyone interested, I suppose it's best to send me a private message.

Jake

Hows the new setup? Which controller did you end up with?

I have been battling more with the buffer time... and somewhat frequently it still seems to just not do what I want it to do...

 

[cody.williams]

Hi,

Is there any way anyone could send me their parameters on their VFD. Matt seemed to indicate that with the machine not running for a long time, the internal memory on the VFD might have went blanked and the parameters reset.