PM-940m CNC - VS Motion Controller Conversion to Centroid Acorn

pburgh said:
Hey Guys,
I also wanted to talk to you about your thoughts for a power draw bar. I was watching a video on YT and a guy from Australia purchased a 3 stage cylinder like the one that Tormach makes from a company in China and setup his power drawbar. I took a chance and purchased the same cylinder and valve that he did from China and it should be here the beginning of next week. Take a look at the video and let me know what you think.
Also, i'm not sure if you've looked at Hoss' site for info, but it looks like his site is gone. He had a lot of good info on there. The site was www.hossmachine.info

Regards,
Doug
Click to expand...

Can you share exactly where you got the cylinder and valve ? I might do the same! Thanks

Jake
 
Absolutely! Mine should be here on Monday. I thought the pricing was good. Here's the info and her response back with pricing and all:
Here's their website:

http://www.xinyipneumatic.com/
http://www.airpneumetics.com/

Her response, model numbers and pricing:

Thanks for your inquiry.

CQ2100X 12-3 US$160/PCS

4V310-08 US$10/pcs Do you need DC12V or DC24V ? (I told her 24v.)

Shipping cost US$80 ( be sure to let her know your shipping location. This price may vary for you.)

Total: US$250

> > If you confirm the order I can send invoice to you by paypal ..

> > Any question, Pls let me know .

> > Best regards
> > Vicky jin
> > Sales Manager
sales@xinyipc.com.cn

Let me know what you think.
Also, thanks for the info on the VFD. That was very helpful. I should be able to fire up the mill tonight with any luck.
Regards,
Doug
 
Jake,
So you recommend eliminating the relays as a way to go? I could do that. I'll have to stop and see if I can get some shielded cable. Do you have a place on line that you like for purchasing shielded cable?
Thanks,
Doug
 
pburgh said:
Jake,
So you recommend eliminating the relays as a way to go? I could do that. I'll have to stop and see if I can get some shielded cable. Do you have a place on line that you like for purchasing shielded cable?
Thanks,
Doug
Click to expand...

Hi Doug,
Considering the existing wire to and from the relays isn’t shielded ( mostly ). You can probably use unshielded there for now. I believe the other two should be however. Consider using a Cable with extras there so you can take advantage of the fault and reset modes the VFD provides. I haven’t wired those yet but it’s probably worth preparing for as the Acorn can sense and send those signals to correct a VFD fault. Let’s say you over power the VFD and it trips a failsafe. It would be nice for the job to stop right then saving us from a bad crash if it wasn’t attended.
I’ll wait until your power bar air cylinder arrives to order mine. Seems like a good idea since this isn’t at the top of my to do list. Hopefully you don’t experience any hitches and it’s a good place to buy from A to Z ! Thanks,
Jake
 
That sounds like a good idea. I'll have to see where I can get some multi conductor cable. Lowe's/Home Depot only have 2 and 4 conductor in shielded cable. Any suggestions for who has cable for sale online that's reasonable.
Regards,
Doug
 
pburgh said:
That sounds like a good idea. I'll have to see where I can get some multi conductor cable. Lowe's/Home Depot only have 2 and 4 conductor in shielded cable. Any suggestions for who has cable for sale online that's reasonable.
Regards,
Doug
Click to expand...
Sorry, I don’t have great suggestions there. Automation technologies inc has some by the foot ( dollar roughly per foot ) but I don’t know if it’s solid or stranded. Recently I was considering using shielded Ethernet cable that is waterproof and can be buried , but can only get large quantities and it’s pretty small gauge. I almost did it... but my brother came through with what I needed from his own stockpile of old wire.)

Jake
 
cut2cut said:
OR you could make life simpler, and remove the relays AND remove the power supply ground and 24v+ from this schematic too !!! in this scheme you should NOT connect COM ( adjacent to the OC4 and OC5 ) on the Acorn to the power supply ground, if you do it will create a ground loop. I assume the COM near OC4 and 5 aren't connected to the COM in other places on the Acorn board. AND NOTE, the OC5 wire jumps over the COM wire. They aren't connected.
Click to expand...

Hey Jake,
Just so i'm clear on this, would I use the COM between OC4 and OC5, or would I use the VFD/COMMON that is a couple of terminals above OC5?
See the pic below:
1516331049686.png



Also, when you say remove the power supply ground i'm not sure what you mean. I disconnected the +24 to the relays from the load side of the breaker eliminating them and ran a new wire directly to the Acorn from the breaker. For the other shielded cable for AN_OUT and AN_GND, did you ground the shield like it shows in the diagram?

Thanks,
Doug
 
I
pburgh said:
Hey Jake,
Just so i'm clear on this, would I use the COM between OC4 and OC5, or would I use the VFD/COMMON that is a couple of terminals above OC5?
See the pic below:
View attachment 254932


Also, when you say remove the power supply ground i'm not sure what you mean. I disconnected the +24 to the relays from the load side of the breaker eliminating them and ran a new wire directly to the Acorn from the breaker. For the other shielded cable for AN_OUT and AN_GND, did you ground the shield like it shows in the diagram?

Thanks,
Doug
Click to expand...

I'm fairly certain the two connectors you are pointing at are common to each other. You could test this with a meter just to be sure, but I believe they are. Currently I'm using the relays. I am using the COM between OC4 and OC5 and all is working fine, so you could try that first I suppose.

In the NON Relay wire scheme you do not want to use either the 24v or Common/Ground from the power supply for the VFD / Acorn section.

However you should wire the Acorn to the 24v power supply per the Centroid manual (as is normal for any setup) and all should be good.

I believe the shield in the AN_OUT / AN_GND is grounded to the acorn ground in the main Acorn power block ( where the power supply connects to the Acorn ) but I'd have to recheck that. It makes sense, though.

Jake
 
guys, keep this link handy. It might apply to us... and also save us from having to use a 5v power supply at all.
Why ? because this happened to me once tonight... upon starting the system after turning it off for a break. Thankfully I just made sure my wires were not loose and rebooted twice and it all worked again. Spooked me a bit, however.
http://centroidcncforum.com/viewtopic.php?f=60&t=1395&start=10
 
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