Wiring Up The Centroid Acorn on The PM-25MV Milling Machine CNC Conversion

[@bryannill3435]

I know this video is older. Just wanted to say thank you for putting it up. I have used it as a reference to converting my PM25

[@hayel2015]

Good work Franco

[@MrPatdeeee]

Franco, in all due respect, at the 6:05 time mark, you said that pin 8 was sending 24 volts to the E stop and then the E-Stop was connected to com. IF this was true, that would mean a "short" circuit that would blow something, the moment power was applied to the Acorn. The correct thing is: The E-Stop is sending a common ("Low" or ground potential) into pin 8 via the E-Stop. Pin 8 then sends this to a "diode and resistor" (on the schematic) that symbolizes a very sophisticated transistorized "sensor". THEN the transistor sensor is fed by 24V. In this way the transistor "sensor" is letting the Acorn unit KNOW that the 24V system is OK. On the other hand, IF the current flowing through the E-stop should rise above a given threshold, the E-Stop will "blow" and kick it self out of the circuit (normally closed to open). Similar to a circuit breaker in an AC panel. This then protects the Acorn unit. Now what would cause the current to exceed that threshold? The transistor (represented on the schematic as a diode and resistor) will sense any number of faults that might occur any where within and outside the Acorn controller. Thus it is protected by blowing the E-stop. So while it is represented as nothing but a" diode in series with a resistor"; it is a very complex sensor that is designed to protect the board from MOST things that would damage it. Again, NO disrespect Franco. I hold you in the highest esteem and love your videos.

[@FrancoCNC]

Thanks Pat Dee. I appreciate comments like yours. I wish I knew more about electronics. I tend to think of inputs and outputs as if they were some of switch. I'm just happy when I don't let the expensive smoke out of my components.

[@MrPatdeeee]

I have a confession to make. I got up this morning after thinking half the night that I was rude in calling attention above. I was going to delete everything I said. Further: my years of teaching electronics got in my way and I should not have done it. Because you wired it 100% correctly. So what difference does it make if the rhetoric was not quite right. IE: in 45 yrs I have seen kadzillions of errors in schematics; But what does it matter if the wiring is correct. Shut my mouth dear Lord! Now I see how graceful you replied. And now I admire and respect you even more. Thank you so much. Keep up the excellent work dear friend.

[@FrancoCNC]

No worries, pat dee. Feel free to comment anytime you hear me explain something incorrectly.

[@Phiz787]

How does that flood coolant relay actually work? I get that a switched COM signal comes from Acorn, and the relay is powered by the 5v Supply... but lets say I have an IEC Connector (power plug) wired to my cabinet, and I plug in a Fish Pond Pump to it. How do I send power to that IEC connector/pump when the relay is switched On? I don't understand how sending +5v/-5v to your Mean well power supply ultimately switches on Flood coolant. I know this is an old video... Hopefully this question reaches you anyway :) Thanks!

[@noithugian494]

Which section did you download that shematic from?

[@trialnterror]

What’s the encoder used for? Spindle rpm?

[@lgyo44]

Franco where are you located I live east of Cleveland Ohio

[@robertmcpherson4298]

I see on the setup there is a setting for TTL. Is that active? Might be able to use for Co2 Laser

[@trialnterror]

I got a 60v av power supply a 24v dc power supply with leadshine 2hss86h drivers. From the acorn schematic it shows I need 5v dc. So it looks like I need to get a 5v dc power supply.

[@lgyo44]

I bought the board also to add to my lathe that has Eding control on it, looking for some help if possible.

[@alid1310]

Helo Franco, I v order Acorn and NEMA 34 from Stepperonline, I have al wiring diagram but don t know to wire VFD Huang Yong to my realys on Acorn. Do you have any wire diagram or something? It is for my cnc router and I need just to start foward my spindle and stop it,without dust collector a other things?

[@FrancoCNC]

Hello - The Centroid website has a link where you can download dozens of wiring diagrams. There should be one that explains how to wire up that VFD.

[@andrewharvey3699]

Great video Franco, are those your new servo motors?

[@FrancoCNC]

Negative. These are the closed loop steppers from Fasttobuy. The DYN2 servos will outperform the steppers, but I'm not sure if my little mill can handle it. I am still going to try to use the DYN4 as a spindle motor. I have high hopes!

[@AB_Tool]

I wired the drives the same way you did but when I hit job x it makes a popping sound then trips my drives any ideas ?

[@danielricaud3783]

hello, my drivers can support 5V or 24V. what is the best solution and what are the advantages of choosing 5V or 24V? thank you

[@FrancoCNC]

24V is less susceptible to electrical interference.

[@trialnterror]

How would you hook up a 3 wire proximity switch to this?

[@cnctoolspro1]

Question on the Centroid free V12 ? What can you not do like threading?

[@FrancoCNC]

Robert Adams Hi. Follow this link: www.centroidcnc.com/centroid_diy/acorn_cnc_controller.html There is a table that compares the versions.

[@skirkdouglas]

What encoder did you end up getting? And have you figured out how to hook it up to the mill yet??

[@koplandavid]

same question

[@CNC4XR7]

Omron is a Good choice but make sure you match the PPR with your max speed. A 2000ppr encoder with a Max Response speed of 100,000 is good up to 3000 rpm after that it misses pulses.

[@FrancoCNC]

Hi. I think I know how I'm going to mount the encoder. On the top of the motor, there is a plastic cover. Under it is a cooling fan. I'm going to make a new fan that allows me to connect the encoder and a new cover that let's me mount the encoder. I'll post a video once I get it figured out.

[@toddcandee9836]

I have been contemplating mounting the encoder as well but when I read in the centroid wizard setup that the encoder must be mounted to the spindle in a 1:1 ratio that threw me. There is little room for this and special pulleys on the belt drive don't help either. Maybe this could be manipulated in the software if you can't do a 1:1 ratio. Not really sure and I haven't investigated any further.

[@dalepowell3822]

@@CNC4XR7 how do you match the encoder, looking to run max 5000 rpm. If you say that 2000 per is only good for 3000 rpm

[@dimimexmaquinadosyautomati8217]

Hello, one questions. If you want to connect two motors for one axis. What is the procedure?

[@FrancoCNC]

They have a diagram for that somewhere. As I recall, you simply send the step and direction signals for the axis (I'm guessing it is your Y-axis) to both drives.

[@dimimexmaquinadosyautomati8217]

Hi Franco. Thanks by youre answer. As you mentioned, I use the two servomotors with two drives for y axis. I have a cnc router working with mach3, but I want to replace mach3.

[@FrancoCNC]

@@dimimexmaquinadosyautomati8217 Check out the Centroid Acorn system. I really like it. IMO, it's the best control you can get for DIY money.

[@dimimexmaquinadosyautomati8217]

@@FrancoCNC do you know where I can buy the accorn system?. Do you know also if centroid can ship to México by dhl, fedex, ups?

[@FrancoCNC]

@@dimimexmaquinadosyautomati8217 www.centroidcnc.com/centroid_diy/acorn_cnc_controller.html

[@shawnhanifan2500]

For the Acorn 3 axis (with room for a 4th) set up like you have here, how large does the enclosure need to be to fit everything necessary, fans, etc?

[@FrancoCNC]

www.factorymation.com/EN-PCG-4050-B

[@shawnhanifan2500]

@@FrancoCNC Thanks. I was thinking a 20 x 24 x 8 box should be big enough. Thanks for the confirmation. I'm really looking forward to starting this project (PM-30).

[@fedeyoutub]

Hi Franco, I am fighting with power supplies, the engine salesman tells me that a toroidal is better, I would like to take switching, I see that you have put switching, what voltage do you use? thank you.

[@FrancoCNC]

The power supply voltage is determined by multiplying the square root of the motor’s inductance by 32, as in the example below for a 2mH rated motor: 32 * (√2) = 45VDC In my opinion, voltage is less important than current. Higher voltage will make your motors run hot and that is not good. When using switching power supplies, make sure you have more than enough current. If your drive needs 6 amps, make sure your power supply can supply 7 amps. Strange problems can occur if you push switching power supplies to their limit.

[@fedeyoutub]

Thanks for the help Franco, I have great difficulties in mathematics .. with 3 Nema34 12Nm the seller advised me to buy a toroidal power supply, (PS. fasttobuy, I buy them from the ebay seller you recommended, thanks again), it gives me a 60V, 900W toroidal .. I don't know if to trust , most of the kits I see them with switching, even if everyone recommends the toroidal ... bho .. what would you do?

[@FrancoCNC]

@@fedeyoutub Fasttobuy people are pretty good. I would use their recommendation.

[@tzampini]

Hi Franco. Just wondering how well the Centroid V12 software can run on a laptop without a touch screen. How convenient is it to use with a mouse? Thanks!

[@FrancoCNC]

Hi. You can use a mouse instead of a touch screen. No problem. In fact, I often use my mouse because my hands are oily and I don't want to touch the monitor.

[@tzampini]

@@FrancoCNC Thank you. I would purchase the Acorn right now, except for one thing that's bugging me. Centroid recommends that you essentially neuter your PC, changing a bunch of settings, making it useless for general use. Since the Acorn hardware is handling all the critical timing functions, is this altering of PC settings really necessary?

[@FrancoCNC]

@@tzampini Well, their #1 goal is to make sure your CNC machine always works well without interruption. They tend to be very conservative. But it works really well. I have never, not one single time, lost a connection or had my software stop while running a program.

[@tzampini]

@@FrancoCNC Thank you, that's very reassuring.

[@TheFixxxer11]

Hi, can i use laptop that don’t have the ethernet port? I use the conveter instead.

[@FrancoCNC]

I'm not sure if that will work. You need a proper Ethernet connection.

[@jonnymonkey2679]

Wheres the dmm stuff?:-(

[@trialnterror]

Oh it looks like v1 is 5v

[@slowjoeturbostang]

How many amps is your 220 volt breaker?

[@FrancoCNC]

15