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F1410HS CNC Project with Acorn
Posted: Fri May 01, 2020 8:06 am
by LorenzoRR
Hi,
I am Lorenzo and I'm starting a project to CNC my mill. It is a small one with 2KW VFD spindle and already have balls screws.
After a lot of comparing, reading, getting drunk about opinions, solutions, etc, finally decided to use Centroid's Acorn system to control the machine. I perceive very good feedbacks overall about Centroid.
Most likely I will use this post for doubts I will have during the project,
First one is about schematic drawing to use for my stuff.
I have purchased material from Stepperonline; in particular, their T series. I believe all material in this series is from Leadshine.
Question: which is right schematic to use; I have chosen the one for Leadshine CS-D1008 because by drivers (pic below) is basically same as their ES-D808. In attached picture we see that connections are exactly same.
Is this the right one?
Thanks!
Re: F1410HS CNC Project with Acorn
Posted: Fri May 01, 2020 10:32 am
by martyscncgarage
Yes, you can use that one....
DO take the time to read this post:
viewtopic.php?f=60&t=1043
Provide as much information as possible. Show us a picture of your machine.
DO follow good wiring practices. Take ALL grounds back to one point, that point is where the service ground comes in.
Yes, do a build thread! Ask your questions as you go along.
Lots of YouTube videos out there too. Search Centroid Acorn.
Good luck!
Marty
Re: F1410HS CNC Project with Acorn
Posted: Sun May 03, 2020 3:30 pm
by LorenzoRR
Thanks Marty, really appreciate.
I am mechanical engineer, and have no real idea about electronics. This is a challenge and I have to make things carefully and not creating a disaster
.
Attached below how I am making design of the electrical board.
Learning here and there about needed protections, good practices, etc...
I will have a look to a public folder for the main data of my project.
Makes sense to know all details for tech help if needed.
Re: F1410HS CNC Project with Acorn
Posted: Sun May 03, 2020 6:06 pm
by martyscncgarage
Looking at your drawing, once you get everything, you might lay everything out on a bench to see if it will all work.
Use the Acorn logic power supply for Acorn only, 5VDC logic to drives is ok. Use a din rail mounted power supply for any other relay's contactors.
You should use a Estop contactor and I'm personally not a fan of multiple drive power supplies. (Especially switching) I would rather buy one toroidal power supply to take care of all your drives.
Look in the latest Acorn schematic set for the Acorn STANDARD System Schematic for more information and ideas.
Re: F1410HS CNC Project with Acorn
Posted: Mon May 04, 2020 10:10 am
by LorenzoRR
martyscncgarage wrote: ↑Sun May 03, 2020 6:06 pm
Looking at your drawing, once you get everything, you might lay everything out on a bench to see if it will all work.
Use the Acorn logic power supply for Acorn only, 5VDC logic to drives is ok. Use a din rail mounted power supply for any other relay's contactors.
You should use a Estop contactor and I'm personally not a fan of multiple drive power supplies. (Especially switching) I would rather buy one toroidal power supply to take care of all your drives.
Look in the latest Acorn schematic set for the Acorn STANDARD System Schematic for more information and ideas.
Why you are not fan for multiple switching power supplies? Is it a matter of EM interferences?
I thought of doing like this in order to ensure power for each drive to allow running in mid-low range of intensity.
Do you think it could potentially affect to Acorn?
Thanks!
Re: F1410HS CNC Project with Acorn
Posted: Mon May 04, 2020 11:32 am
by martyscncgarage
No, they won't affect Acorn. For me it's a matter of physical space required. I prefer Toroidal power supplies. You should be fine.
Re: F1410HS CNC Project with Acorn
Posted: Mon May 04, 2020 1:45 pm
by Muzzer
I made the mistake of buying several SMPSs from Leadshine for my Bridgeport conversion way back when (one per axis). I connected the X and Y supplies in parallel across a large electrolytic, thinking this would help to smooth out the load and reduce ripple and spike. However, they see it as a dead short at startup and go into a latched shut down state until you kill the input, let it discharge (>30s) and restart. So now I will need to either fit some sort of soft start circuit, remove the electrolytic or change PSUs. In the meantime, I continue to double start the PSUs in the above fashion, which is a royal PITA.
A lot of benefits with mains transformers, either toroidal or conventional construction. The main drawback apart from their size and weight is the tendency to trip the circuit breaker occasionally at turn-on. That's due to the cores saturating at turn-on, as a result of random levels of remanence (residual magnetising flux in the core) each instant you turn them off. Simply fitting a larger circuit breaker isn't the fix. You can either use a phase control soft starter (reassuringly expensive) or a precharge resistor with time delay relay - that's what I did on my larger machine.
I see the Centroid bridge rectifier board includes an inrush limiter which would help my PSUs but not the remanence issue with a transformer. Getting those inrush limiters correctly sized is difficult when you have a wide range of load currents.
Re: F1410HS CNC Project with Acorn
Posted: Mon May 04, 2020 2:05 pm
by LorenzoRR
Muzzer wrote: ↑Mon May 04, 2020 1:45 pm
I made the mistake of buying several SMPSs from Leadshine for my Bridgeport conversion way back when (one per axis). I connected the X and Y supplies in parallel across a large electrolytic, thinking this would help to smooth out the load and reduce ripple and spike. However, they see it as a dead short at startup and go into a latched shut down state until you kill the input, let it discharge (>30s) and restart. So now I will need to either fit some sort of soft start circuit, remove the electrolytic or change PSUs. In the meantime, I continue to double start the PSUs in the above fashion, which is a royal PITA.
A lot of benefits with mains transformers, either toroidal or conventional construction. The main drawback apart from their size and weight is the tendency to trip the circuit breaker occasionally at turn-on. That's due to the cores saturating at turn-on, as a result of random levels of remanence (residual magnetising flux in the core) each instant you turn them off. Simply fitting a larger circuit breaker isn't the fix. You can either use a phase control soft starter (reassuringly expensive) or a precharge resistor with time delay relay - that's what I did on my larger machine.
I see the Centroid bridge rectifier board includes an inrush limiter which would help my PSUs but not the remanence issue with a transformer. Getting those inrush limiters correctly sized is difficult when you have a wide range of load currents.
Thanks Muzzer for your feedback; however for me is a little like reading polish. I am not skill at all in electronics and need to go step by step.
My plan is to share in this forum detail design of my setup, including e-plan, components I plan to use etc.
I believe I will be more on safe side because as said electrical stuff is not my core
Tech feedback based on schematics will be slower but eventually safer preventing to crash the electrons against a wall (or a cliff) !
Re: F1410HS CNC Project with Acorn
Posted: Mon May 04, 2020 2:56 pm
by Muzzer
Sorry, I just drifted away there. After almost 4 decades of developing power supplies and VFDs, sometimes I can't help myself. You know what engineers are like....
Re: F1410HS CNC Project with Acorn
Posted: Mon May 04, 2020 4:29 pm
by LorenzoRR
Muzzer wrote: ↑Mon May 04, 2020 2:56 pm
Sorry, I just drifted away there. After almost 4 decades of developing power supplies and VFDs, sometimes I can't help myself. You know what engineers are like....
No problem, really. Thanks for supporting!
My machine has 2KW motor with VFD; I will want to control it with Acorn. It is a built-in solution from wabeco (F1410HS).
I will need some help for sure.