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- เผยแพร่เมื่อ 30 พ.ค. 2024
- Click here for Stepper Motors: www.omc-stepperonline.com//?t...
Click here for CNC Control: www.centroidcnc.com/centroid_...
Click here for Machines: www.precisionmatthews.com/
Click here for Fusion360: aklam.io/c5qzM3
For motor couplings, search Amazon for: uxcell 8mmx10mm Clamp Tight Motor Shaft 2 Diaphragm Coupling Coupler - วิทยาศาสตร์และเทคโนโลยี
Very nice! Thanks for sharing the steps of your new project!
you do a very good job with the videos you upload..you have helped me a lot, keep up the very good work you do ,, I am watching you from Greece.
YES!!! YES!!! YES!!! The PM-728V-T is going to be CNC'd!!!
I have the same motors controlled by centroid Acorn and run very well.
No complaints or regrets!
I did it a really good choice for this 2 products!
Franco you’ll be happy after set up this motors in your mill!
Are you running a VFD? I'd like to see how you connected it to your controller board.
Yes I do
What brand of VFD are you have?
Can you do a video with software review for how you are interacting with the motor/encoder?
Hi just finished watching this vid you have it figured out really good i have the same PM mill just put in NEMA 34 for the Z and 23 for the x y using CL57T i can move the zed but for some reason the x y don move at all i noticed i can turn the motor by hand but when i changed it to 4000 like you mentioned no way i can turn it. but still can't move it I'm using a masso controller i was hoping you could help me out I'm thinking i have the wrong settings. any help would be greatly apreciated.
Would you know if Is it possible to wire MPG directly to the driver AND continue using CNC controller. I have MK3/4 usb CNC controller which does not support generic MPG.
I like it and I love the size of that driver.
Nice pieces and the prices look good too.
Hello Franco. What about stepperonline stepper and driver kit can you tell two years later
Hello, can you tell me how you connected the alarm signal output?
Hi Mate,
I am going to carry a steel pallet (overall weight of 700 kg) over rollers with 2 stepper motors on each sides, do you reckon "Nema 42 CNC Stepper Motor Bipolar 30Nm" is enough for this application?
Franco thanks for posting. I’m having trouble locating the configuration software. Can you help? Thanks, Steve
Good info ....but please add comments on cost $$$ and a quick demo running the steppers with no load
Dear Franco, can i get index signal from encoder?
My Z axis weight 14 kilogram, can it handle with this stepper motor or is it better with 8.5NM?
Hey Franco - I totally appreciate the videos - my PM-728VT turned up about the same time as yours did - it was nice to see your evaluation matched mine
I am curious why you did not opt for Clearpath servos for this build - that is the direction I am currently thinking about - a little more expensive, but given the base cost of the mill it seems like they match the mill quality and precision I am looking for
If other options make sense I would love to get more input - thanks again
th-cam.com/video/Gq03WN99FoE/w-d-xo.html
thanks for the vid. I can't believe how cheap they are . I hope they work with my ethernet controller .
Thank you for all the videos! I just got a Sherline lathe and want to convert it to CNC with acorn, which motors and drivers would you recommend for my build from stepperonline?
Hi. Thanks for watching my videos! Here is the link to Stepperonline that supports my channel:
www.omc-stepperonline.com//?tracking=5e66c8d3ae793
I think you will find that these motor/driver combos could work well for the Sherline lathes: SKU: 1-CL57Y-23HE22 or SKU: 1-CL57Y-23HE30
The Sherline open loop motors are only 136 oz-in. Both of these options exceed that. Just keep in mind, bigger isn't always better as the more powerful motors can actually damage your machine if you crash.
PLEASE NOTE: Sherline really wants you to use 1/4" shafts and the stepperonline motors use metric shafts. You can try to find different couplings or you can check out this vendor:
www.automationtechnologiesinc.com/products-page/nema23-closed-loop-stepper-motor-system-hybrid-servo-kit/hybrid-servo-drive-kl-5080h/
I hope this helps!
Well explained, i like my nema 34 from stepperonline!
I also have those motors, and hope they can push my beast around well
@@paulbertsch7540 here is the one i bought my video: th-cam.com/video/IydKu_NMd7U/w-d-xo.html
what machine are you trying to push around?
stepperonline is selling gearboxes as well. Can you ask them for a review unit.
Is it possible to connect CL57Y with Nema 23 closed loop with 8wires to encoder? i can see you have 6wires from stepping motor to encoder how should i solve this ?please explain! thank you
Would you recommend setting the stepper driver frequency to match the frequency of the cnc controller, or visa versa?
If the controller is outputting pulses faster than the driver can read them, you will miss steps. Make sure the controller is set lower than the driver.
Hi Franco, are you going to do a video of your new closed loop steppers running. I am considering them for my build and would like to hear what they sound like compared to the DMM servos you did in your other video. If these are about as quiet as those then I will go this route. Let me know. Thanks
Yes I am. I may get that video out this evening.
@@FrancoCNC Great, Thank you!
How is this different to a closed loop stepper motor?
Hi Franco,
As per your recommendation I bought those closed loop stepper Driver and Motor from stepperonline.
I'd like to know what cheap control board I can bought to make them work for my little workbee CNC machine? Thanks a lot
Well, the "cheapest" thing you can do is buy a $15 breakout board that works off of a parallel port. Then, you'll have to find a 32bit computer running an older version of windows and install Mach3 on it. That would be the cheapest. Another option would be to buy one of the cheap Chinese USB boards on eBay. I had one. I worked but it was very flaky and there was a huge buffer lag. I like the Centroid Acorn products. They are not the cheapest, but (in my opinion) are by far the best option out there.
BTW, I am curious, how do you know if the size of the steppers is going to be the right one?
The size - Nema 17, 23, 24, 34 - is just the size of the motor and is only a broad categorization of how powerful the motor is. You'll see 17's range from 11-79 ounces per inch and 23's range from 34-300, so as you can see there is some overlap. You could have a Nema 17 have more torque than a 23, but in general the higher the motor size (Nema number), the more torque it will have. Now as for figuring out the right motor for your application, you need to figure out how much weight you need to move. 3D printers usually use 17's, CNC routers will use 23's and 24's, and for heavier applications you would use 34's.
To give you an idea, a CNC router will move the X and Y axis with use of a ballscrew. It is very efficient because the weight of the ballscrew is right in the center of it. If you understand more about ounce per inch ratings, you will understand that it means it can move that amount of weight an inch away from the shaft of the motor. This decreases the further away from the shaft you get. Think about how lifting a 20 pound dumbell is easy if you hold it close to your body and move only with your wrist, while if you move it all the way out and lift with your entire arm, it is MUCH more difficult. Same thing with how ounce per inch with a stepper motor.
So, in an application like a robot arm, it would require very high torque, likely in the 1000's. Whereas a CNC router's ballscrew utilizes weight more efficiently and thus only requires torque in the lower hundreds. 3D printers are so light, under 100.
Please a video when working and setup.
Did you go with the $800 ballscrew option straight from PM on the PM-728-VT or are you going to install your own ballscrews when you go to CNC it? Not sure if that ballscrew option from the factory is new but it seems like it would save a bunch of work and hassle if they are good quality.
Hi. I'm waiting for the PM kit to become available. I'm hoping it comes with better quality ball screws than what is normally available on eBay.
@@FrancoCNC thanks for the reply back. On their website now it lists the balls crew option and it isn't listed as being backordered. I just don't recall ever seeing that on their site before so wasn't sure if it was new.
@@Hazdazos I don't want to speak for PM but now that they have moved the ball screw kit over to the same page as the machine, I'm guessing they will be available very soon.
Hey Franco I am on the stepper online link you provided and I am buying 3 motors with drivers and the kit is including a power supply for each motor is this how you set your machines up a separate p.s. for each driver/motor?? Please let me know so I can get the order put in using your hyperlink
Hi. If you have room in your enclosure, you can have three separate power supplies. However, there is nothing wrong with with having the X & Y share a power supply as long as that single power supply has enough wattage to power both drives. On my PM-25 conversion, I used three individual power supplies. Wattage / volts = amps
Why did you decide to go with these steppers? After watching your other videos I though you would go with DMM servos rather than a stepper. I picked up a PM-30MV mill back in Jan and plan on going with the DMM setup. Can you give some reasons why you went the way you did? I enjoy your videos and very informative. Thank you!
I got my PM-30MV in February last year and had it converted by the beginning of August. I used close loop steppers because they give you positional accuracy without fear of missed steps. They are also a lot cheaper than servos. I used 1128 oz in motors on all 3 axes. It's overkill for X and Y but they were only $200/axis for the motor, drive, and cables. I used a Unregulated Linear 1440W/72VDC/20A Toroidal PSU to power all 3 axes that added another $200. That's only $800 for the whole thing. I limit my rapids at 300 ipm but could go faster without losing steps. The clearpaths and DMM setups are great but I don't see much advantage using them in my situation.
@@3dmakerzone75 What brand of closed loop steppers did you go with? Secondly who did you go with for your ball screw kit? I've been looking at either Arizonavideo99's kit or the one from ProCutCNC. I would love your feedback.
@@alanz3138 I got the closed loop steppers from Automation Technologies Inc. They have a kit that includes the motor, drive and cables. I also got the power supply from there. I got the Arizonavideo99 kit. I am also using the Centroid Acorn controller. I am very happy with the whole setup. I post most of my stuff on Instagram under @3DMakerZone. Please DM me there if there is anything you would like to know about my build. I would also like to hear about your build.
Do nema 23 and nema 24 have the same hole spacing for mounting?
They are slightly different. Check this out: th-cam.com/video/Gq03WN99FoE/w-d-xo.html
@@FrancoCNC You can get identical hole spacing on nema 24's depends on the manufactures www.aliexpress.com/store/1907567?spm=a2g0o.detail.1000002.2.48b54011T7WZ1z This is a very good company they have 780 in/oz nema 24 with either size hole centres 47.14mm(nema23) or 50mm(nema24) they come as standard with 47.14mm if you want nema 24 hole centres you need to specify so they are a direct swap, they can also run on AC or DC, I am going to use one on my pm25mv equivalent for the Z axis, plenty of holding torque for the heavy head www.aliexpress.com/item/32799547111.html?spm=2114.12010612.8148356.1.1b693421dJ7mMj
Teknic likes to make a claim that if you grab the shaft of the clearpath servos you will burn your hand. It will not stall. Is that true for closed loop steppers. Can they stall.
Hi. All motors can stall - even the closed loop servos. Closed loop steppers do the exact same thing that servos do - based on the parameters you select for error compensation, they will attempt to correct position. If they can't correct the position within the given amount of time/position error tolerance, they will alarm out. For instance, if a close loop stepper is at rest holding a position, you can put a wrench on the shaft and turn it. It will "fight" you as you turn it and try to come back to the correct position as soon as possible. Something similar happens during axis motion. Long story short, the ACORN sends all of the instructions to the drive module. The drive works with the motor encoder to make sure the commands are physically executed.
Hello Franco, thanks for all the nice videos. I am planning on converting the PM-728 as well. I was about to order the motors/drivers using the Stepperonline link you provided and ran into a snag at the last moment. The conversion kit from PM uses a Nema 34 mount for the Z axis and a Nema 23 mount for the X and Y axis. On top of that, the shaft couplings for the X and Y axis need an 8mm shaft. Stepperonline does not sell a Nema 23 400+ ounce stepper motor with an 8mm shaft. What motor & couplings did you use for the X and Y axis?
Hi. This is a great question. NEMA24 and NEMA23 bolt hole patterns are nearly identical. But, the NEMA 24 motors usually have bigger shafts than NEMA 23 motors. So, you need something like this:
www.amazon.com/uxcell-Clamp-Diaphragm-Coupling-Coupler/dp/B078VR9V7J?th=1
These types of couplings are much better than "stock" and will help reduce the backlash. You may need to do a bit of grinding to make sure there is clearance for these couplings but it is worth the effort.
Wow.... I can't say thank you enough! You just made my day... I will be ordering the motors/drivers from Stepperonline today. When you mentioned grinding to make the couplings fit, do you mean that you need to grind down the ends of the coupling?
BTW.. the guys at Stepperonline are amazing... they offered to program the current on the CL86Y to match the current rating of another Nema 23 motor for me. All you have to do is order from the China warehouse and tell them what the current draw is for the motor and they will program the drive for you before it ships! Pretty impressive!
@@joels4208 you will not want to modify a couplings. You may need to grind the castings a little bit to make clearance for the diameter of the couplings. And depending on how long the ball screw shaft and the motor shaft are, you may need to shorten the shaft coming out of the motor. It sounds more complicated than it really is.
@@FrancoCNC I will tust your judgement and get them ordered up. I would really rather use the 566 ounce nema 24 motors than the smaller nema 23. Just curious... have you completed your PM-728 conversion? One last ? Stepperonline paired their 566 oz. stepper with a 48 volt power supply (in their kit). I think you mentioned that you were going to use a 36V power supply with this motor so it would run cooler. Does this mean that you would get noticeably less power out of the motor running at a lower voltage?
@@joels4208 Hi. Unfortunately, I did not complete the conversion. But, the process is very similar to what I did on several other milling machines. Other than the fact that you may need to use the grinder and hacksaw to make a bit of clearance for the larger motors, there really is no down side to going with the NEMA 24 motors. But, if you want to play it safe jump on ebay and check this out: eBay item number:164316376612
The 428 oz-in motors with work great for X & Y and you won't have to worry about fitting them up. But, I would still use the fancy diaphragm couplings.
Regarding the voltage of the power supplies, the only time you would see the difference is if you intended to run the motors at high speeds (which doesn't typically happen on CNC conversions). More voltage does provide more power, but it also makes more heat which is not good.
Why buy a servo if I can get a closed loop motor for less money?
Franco do not take take this the wrong way i lover your informative skills and mindset just on thing is happening i can smell that brown tongue all the way from stepper online china to Australia right back to the US of A shit if S.O hasnt given you freebies yet id be dumbfounded on how it isnt possible S.O couldnt get a more glowing customer review if they paid for it LOL keep up the good work brother......
By the way what size motor did you settle for on the z axis?
You should have at least 1200 oz-in for your Z-axis. I went with something that was in the neighborhood of 1600 oz-in.
A working, finished system, would have been nice.
07:55 - *capable of 51200 pulses/rev*
this drivers are not "capable of 40'000ppr". here is the thing: the reason why you choose closed loop system is the closed loop (obviously) with position feedback from encoder. and encoder on this motor is 1000-line quadrature type what means that it have 4'000 "steps" per rev. so - 4'000 is the max. any larger pulse per rev count are not supported with proper feedback and the resolution of the system is always capped at 4'000ppr.
Hi Franco, I just posted this comment a few minutes ago on an older of yours, but thought you may not look back at those very often. But, I'm having a real tough time finding info from anywhere on the 10V and 0-10 V connection to my Acorn board from my VFD, and really want to make sure of what goes where before i set it on fire. I've watched most of your videos, but have not been able to get the info I need. I'm trying to contact Acorn about the question but no response yet. Do you have an email I could contact you through. I'm sure it is a very simple solution. Thanks.
Hi. Maybe you can ask your question here (or in the Centroid Forum). That way, others besides myself can attempt to help. Thanks!
How much does this set up costs? how long did they take to ship from China?
Hi. If you follow the link in the description of this video and then search for 1-CL57Y-24HE40 you'll see they have some inventory in the US. Looks like the driver/motor combo (with shipping) is about $100. Shipping from China is obviously more expensive but they usually get things here in less than two weeks. DHL is a pretty good carrier out of China.
Very nice, but why not just make the jump to a full servo motor and leave all the drawbacks of steppers behind?
Cost. Servos are very expensive
i tried ordering a couple of motors from this company and they a minimum order of 50 motots? what am i gonna with 50 motors?
Something is wrong. They will sell individual motors and drivers.
@@FrancoCNC www.omc-stepperonline.com/nema-23-closed-loop-stepper-motor-30nm425ozin-encoder-1000cpr-23hs45-4204d-e1000.html?search=23
@@randallsadams send an email to sales@stepperonline.com and tell them what is happening. Something is messed up on the website.
Quit making me want to buy new things. I’m waiting on Dave Clements from Arizona video to send me my balls screws. Think I bugged him too much, haven’t heard from him in weeks. Meanwhile I’ve got all the paint removed and cleaned up. Quite a few pitted areas in the castings so I gotta get some filler in there. Gonna go with a black and yellow theme. Once I get the screws I’m gonna fill it with epoxy granite. Probably west system epoxy with slow hardener. Linear rails in the future.
What does MF mean?
It's the Enable inputs
It has a USB connector but you need a separate programmer? Like.. what? Did they just misuse the usb connector for a RS232 connection? What is this shit? :D