Hi all. I am really new to this but i have a lot of interest in setting up my workshop and woid router will be center piece of it.. I love to do hobby projects.
Problem is my area has frequent power outages. Software and ardunio controller will not be so affected in power outage bcz they will be running on my laptop.
Drivers boards and steper motor is seprate story. I am thinking to select nema 23 3A motors. I am buying 4A steper control board. To prevent any loss during power outage i am thinking to hookup a car battery in parallel to power supply.. Is it good idea to do so.
Is there any other simple solution to deal with power loss
PS. Are those chinese made boards and spindles any good.. They are selling very cheap.
It is certainly possible to use a battery for backup. Do you plan to use an inverter to convert the battery DC voltage to AC or are you planning to develop a system that works all the time at the battery voltage and use the mains to keep the battery charged?
Car electrical systems are usually 12v and stepper motors would probably work better at 24v.
You should also be aware that stepper motors are very inefficient so don't expect a long run-time unless you have a very large battery bank. And automotive starter batteries are not designed to be discharged deeply. If you want a long run-time on battery power you would need more expensive deep-cycle batteries. A starter battery would be perfectly suitable if the purpose is just to permit an orderly shut-down when the mains supply fails.
thanks robin.. now i think just an ordely shut down will be enough for me and i can resume after power comes back.
i plan to use battery directly. as its purpose will be to give me few seconds to save my progress. using inverter seems just adding extra cost.
So in this case, will 12V battery be enough for me. what should be electronic setup for such system. i Hope some one can give me idea on that
I have seen amplifiers that can run on 24 volts DC. When running on mains they had a transformer to step the mains voltage down to approximately 24VAC, which then had a rectifier and capacitors to create a 24VDC supply.
This supply and the back up battery were connected together through another rectifier such that the power to the amplifier circuit came either from the mains or the battery. No user intervention was required to select where the power came from, and the change over from mains to battery in the event of a power outage would have been seamless.
This approach might be the easiest way for you to implement a battery backup system for your CNC router. It won't necessarily be that efficient though as power will be lost through the second rectifier.
i dont think i should make transformer or rectifier. instead just use a DC power supply.. i think i should use 800Watt power supply that should give me 24V DC output. i plan to run 400W spindle also form same DC power supply see attached diagram
800 watts at 24v s 33 amps so I am reluctant to give advice as I know nothing about your electrical competence. It would be different if you were just using 1 or 2 amps.
You will need something that enables the Arduino to detect when the mains power fails.
You will also need an arrangement that causes no glitch in the 24v supply when the power does fail while, at the same time not over-charging the battery. I guess if the power supply provides a regulated 24v output it won't be able to overcharge a 24v battery.
i am just starting to understand electronics of cnc router. i have decided to use following components to build my cnc wood router. ( 3ft by 5ft working area) but the problem is frequent power faliures. i want to make sure to get around this problems. either by using back up battery or by any other technique, may be there is some way because i dont understand software yet too
arduino 2560 R3
4A 9~40V Micro-Step CNC Single Axis TB6600 Stepper Motor Driver Controller LIO
2 Phase NEMA 23 Steper Motors 3Amp
400W DC Spindle (Brushed)
using 4A driver board for 3A steper motor will not make problem right?
Years ago I had a pick-and-place machine to place SMT components on circuit boards. It was dumber than a post and any power outage would stop the machine and the operator would have to clean off a partially done board and start over. The machine ran on 230 volts, single phase.
I bought a large, I think 5kva, perhaps larger, UPS from the state surplus store on Ebay. Was not operational as it needed new batteries. It was also programmable to set the output voltage to 230 VAC. It was a real UPS, not one that switched to battery backup when power failed. So even a drop of part of a cycle was not noticed. It ran on 48 volts, using 4 12 volt batteries. Never had a machine stoppage because of power.
You might do well to investigate such a device, but I don't see them surplus much anymore.
thanks for help all. its my first build and i am trying to do it best,,
big UPS will set me back big $ i am trying to keep my cost as low as possible. will be using Mi; steel from welder shop to make mechanical components i have seen videos and results are good enough for me.. dont want to go with Al extrusions bcz of $
still hoping to find solution for power outage with least cost
going with this approach (link below) bcz its seem very low cost
Ehtisham-syed:
so my diagram can work.. with all components i listed before
I am not prepared to comment for the reasons I gave in Reply #7. The devil is in the detail and I am not prepared to be the cause of a workshop fire or a battery explosion.
