My CNC Router Build - 11) Upgrading to closed loop steppers
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- Опубликовано: 24 окт 2019
- these steppers will automatically shut down the cnc if the axis gets stuck and looses steps, but will actually try to correct itself first. if it can't correct, it shuts down. I didn't even know about them a few months ago. now I don't want a cnc that doesn't use them!
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have you noticed an improovement in speed , acceleration and lorque with the closed loop vs open loop ?
Sorry Alex the open loop steppers were over powered and the newer closed loop ones are as well. Hard to compare when you really have no problems with either one. The biggest issue I have with speed is that I am using a very old computer with a very cheap bob which limits my max steps per sec. So if I want high resolution I can't feed fast. And visa versa.
Oops meant to say hard to compare when you rrally have no problems with either one
@@eddowney9548 cheers thanks , my closed loop steppers are on their way , cant wait to fit and test
Hi... i m interested in the latch emergency stop that you use... can you share the details on that
Hi Wira. Yes, I take the wires on all the ALM+ and ALM- and simply run them in series with each other, then wire them in series with the e-stop switch. If the drive faults out, it will turn off the spindle and disable the drives.
The e-stop itself is wired into the breakout board at marker 7:20 in this vid - ruclips.net/video/l1lK107s08w/видео.html
It's been a while, but I think all switches are in normally closed option which is preferred.
One wire from the e-stop ( e-stop is set for normally closed ) goes to pin 10 on the breakout board and the other goes to ALM- on the driver, then from ALM+, then to the next driver's ALM-, out of that driver's ALM+ until you go through all the drivers like that in series, then out of the last ALM+ of the driver to DC ground.
note** if the ALM+/_ connection is normally open, you will have to wire the drivers in parallel with each other and then wire the e-stop in parallel and the e-stop will need to be normally open as well.
sorry it took so long to reply. I don't come on here alot. Feel free to ask if you have more questions, I'll do the best I can to help you.
Where do those green red and yellow on the end wires go to on your break out board ?
Hi Ron. Sorry, I'm not sure where I got that wire. Over the years I have scavenged many things. I find them in second hand stores or yard sales, etc. I think this is one of those items.
hey Ron I just re-read your question and I see that I misread it b4. I thought you asked where I sourced those wires. They got to the top of my BOB as seen in this vid at about 2 mins in - ruclips.net/video/l1lK107s08w/видео.html
I have read that 36v is actually the most common used for these
yes, I'm sure 36v would be fine, but I am greedy and want everything I can get out of it. I ended up going with different drivers for those closed loop steppers as seen in this vid here
-> ruclips.net/video/t8Xm_-lnXrQ/видео.htmlsi=NMEjH_VhJezZQRom
If I remember correctly, they can take up to 80vdc. I put 60v power supplies in for them, but wanted more, haha.
At the time I made this vid, someone had told me that higher volts will help you achieve higher feed rates (everything else being equal). Not sure if that is true in a system like this where it has alot to do with how fast it pulses and how well it can process those pulses, but in any case, I do want all the holding power I can get and overkill also allows me to trim it down a little and run at a cooler temperature generally speaking.
You use the power cord to connect the power supply. to the driver What's the motor number?
I just found your message. I will look at it tomorrow and tell you. I am not sure if you are asking what motors I am using, or where to plug the motor into the driver. I'll get info for both
@@eddowney9548 What size of fiber cable copper wire?
@@eddowney9548 Do you have a wiring diagram? Is it a cnc system? I'd like to see a paper drawing holder. before connecting to actual use
I actually ended up going with a different driver/servo combo with a higher voltage carrying ability. Everything works the same and connects the same, but the one I ended up using is stronger.
The driver - LiCHUAN model LCDA86H Microstep Driver. It can use VAC 20v-70v or VCD 30v-100v. And it can use 5vdc to 24vdc from the break out board. Maximum 51200 pulses per rev.
The motor - LiCHAUN LC60H2127
2 phase servo, step angle 1.8deg
phase current 5.8a
holding torque 5.5N.M.
it uses 4 motor leads and 6 encoder wires that come prewired.
Maker - Shenzhen Xinlichuan Electric Co
I can't remember, but I think the encoder is 1000 steps, maybe it was 2000, and the driver has an option for 1000 or 2000 microsteps, so I think I just made them match. But, you can use other combinations.
As I said, the motors come pre-wired so I just connected them to the driver. If you need to supply your own, it needs to carry 6a, so I'm guessing minimum 18ga. I always go overkill, so I'd probably use 16ga.
The other wires are signal wires, so size not too important really. I use small, but not tiny wires there.
This is not a "kit" cnc. It is just kind of thrown together. I don't know what you mean by a " paper drawing holder ", but no, I didn't have a wiring diagram to go off of, but if you understand it well enough, it's easy enough to figure out.
hope this helps. Let me know if you have any other questions. I'll do my best to answer, but I'm not really very knowledgeable myself. I just watched alot of vids and read alot of forums. I also joined a Makerspace and people there helped me too
No se mucho al respecto pero creo que hace falta mucha organización en los cables y en los componentes de la maquina ya que de ahí provienen los accidentes.....critica constructiva sin afán de ofender...saludos
Gracias, acepto todas las críticas. Estoy de acuerdo en que la mala gestión de cables como la que tengo en esta máquina puede ser algo malo, personalmente nunca he tenido un problema con ella. Personalmente, no me gusta la cadena de arrastre de cable que usa la mayoría de la gente, pero me gusta la forma en que se ve una cadena de arrastre. La forma en que tengo mis cables es muy funcional, y soy un tipo de función sobre la forma. Usé el traductor de google para responderte. Espero que funcione bien. Gracias nuevamente por tomarse el tiempo para comunicarse conmigo.
Acabo de echar otro vistazo al video, y tienes razón, jaja, ¡es feo en mi caja electrónica! Desafortunadamente para mí, tiendo a hacer algo temporal y termina siendo permanente.
Y ahora deseo actualizar toda la máquina para que tenga un diseño de metal y rieles hiwin en lugar de los cilíndricos que tengo ahora. Así que siento que si lo arreglo bien, será una pérdida de tiempo.
nc means no connection.
thank you Noan. I had to play the vid back to see what you meant. It's at about 4 minutes in. I suppose you may be right. It still seems odd to me that they'd have a means to connect a wire there if it is in fact no connection to be made. Doesn't really matter, I didn't use it and all is well. It works no issues.
@@eddowney9548 Sometimes when you design something you make room for future use but you mark it as not being used for people to know its not to be used. ;)
@@noanyobiseniss7462 thx, I'll keep that in mind. Maybe I'll be a little less confused at times in the future. Always nice to learn something new.
When you reset the e stop does it reset the drive or do you have to restart the drive?