[guy2b1]

I would like to ask for your help on how to create my power supply for my 4 pieces of stepper driver with 32-65VDC and 4 pieces stepper motor with 65V 2.3A I am a newbie and have no idea about electronics but I am very excited and eager to learn more about CNC creation and operation. The details indicated on the label are the following:

Stepper Driver
32-65VDC

Stepper Motor
is(dc) : 2.3A
Po : 71W
vs(dc) : 65V
Bipolar Series

I have these in 4 pairs and I need to create the power supply for it for my 4 Axis CNC Router hobby project. What voltage and amps of power supply should I use to optimize my existing parts and achieve rapid speed movements?

[guy2b1]

What parts should I need to create my power supply?

[ahren]

You would need a transformer and a rectifier to start, but do you really want to build a power supply? There are good supplies available for not too much money, and if you don't know how to build one, you stand a good chance of frying your motor driver if you do it wrong. To me, there are many more fun aspects of building a CNC than the power supply, but that's the mechanical engineering in me talking Personally, I would buy a 7.3A, 48V supply from Keling and call it done.

That being said, maybe post some pictures of your motors and driver. Are they a matched set? 65V seems really high for stepper voltage. Most steppers are in the 2-6V range, and you run them at 10-16 times their rated voltage. Perhaps these are a matched set?

Ahren
www.cncrouterparts.com

[analogman]

Power supply: Transformer, bridge rectifier, couple of filter caps, load/drain resistor. If you want to go regulated (really only needed if you are within 15% of max voltage).

Check out Bob's notes:
http://campbelldesigns.net/how-to-bu...wer-supply.php

However, as ahren says. Why bother. It is just the same amount of money to purchase one, less time spent and MUCH more accurate (especially if you never built one).

See http://www.antekinc.com/ps.html

[ger21]

Those steppers are 65V max. Somewhere around 3-3.5V bipolar series.

[guy2b1]

Thank you very much for your replies, I need to build my own power supply from scratch because there is no available ready made power supply locally instead of ordering and shipping internationally as our voltage is different here in the Philippines. All of my stepper drivers and motors were salvaged from old industrial machines and I will try to post some pictures later but the brand of my stepper driver is RTA PAVIA so the driver and motor is a matched set and salvaged the parts from 1 machine

[analogman]

Philippines is not any different that most other countries. Your wall voltage is 220V. Most pre-built power supplies (including the Antek) handle both 110V (north america) and 220V (the rest of the world).

http://en.wikipedia.org/wiki/List_of...nd_frequencies

The antek power supplies are actually imported to the US from China. If you ask around locally in electronics shops, or use google, you wont have a problem locating a power supply. Inexpensive ones will probably be the same as antek.

Where were you planning on buying the individual parts for the power supply? I bet they will have premade ones.

However if you are planning on scrounging your parts, you'll need to learn a little bit about transformers, rectifiers and filtering. Here is a little article that will give you a good idea of how it all goes together. Ignore the part about regulation.

http://www.eleinmec.com/article.asp?16

Of course your parts will be similar in concept, but different in value.

[guy2b1]

Thank you analogman, but I guess my other concern are the shipping costs were I can purchase the parts price less cheaper than the shipping costs

Here are the pictures of my stepper drivers and motors in 4 pairs

Powermax II Stepper Motor
Is(dc) : 2.3 A
Po : 71W
w : 1500 RPM
Vs(dc) : 65 V
T: 90deg C MAX
Ambient : 40deg C
Bipolar Series
http://www.pacsci.com/products/step_...xproducts.html

RTA PAVIA Stepper Driver
Model : SDC 05 (old model I guess as I cannot find in their website)
32-65VDC
http://www.rtaeurope.com/rta/

What do you think is the best power supply in Volts and Amps to supply 4 pairs of stepper driver and motor and I need to add 5Volts regulated to control the steps and directions? Any schematics where I can find to follow step by step instructions for newbie like me when it comes to electronics?

[ger21]

If the drives can handle it, I'd run them bipolar parallel, 4.6Amps and about 36V.

[guy2b1]

So how bipolar parallel are going to work or how is it wired? sorry for my noob question as I really have no idea about electronics and terms as I am starting to learn from you guys but thank you very much for your patience by asking you some my questions

[analogman]

No, there is no step by step sites for newbies to build the exact power supply you are looking for. Ger has posted your power supply specs. If you want to build it yourself you will have to do some learning. I posted two good sites in my previous postings, read them and learn.

Use the search here to look for others have built poewr supplies. I found at least four schematics when I searched.

Use google to help with your learning.

[guy2b1]

thank you very much will build my power supply right away, and post here my status

[guy2b1]

Finally my power supply has been built. I tested it earlier and it worked all my motors moved as desired. With the assistance of my friend on building my power supply I came up with 48Volts 6Amps were I purchased 2 pieces 24Volts 6Amps transformers wired them in series. All my 3 pairs of stepper motor and driver are working but during rapid movements sometimes I loose steps still adjusting the velocity and acceleration. My 4th pair of stepper motor and driver are not connected at this time as either I am planning for it for A Axis or a second Y Axis support to move my gantry because of the weight and balance movements. But I noticed that my power supply has a strange hizzing noise or sound of electricity work load Im not sure if this is normal. Also if I connect my 4th pair of stepper driver and motor will see if it can handle the power load from my power supply

[guy2b1]

Im still having some problems with my stepper motors sometimes I encounter miss steps using my power supply of 48Volts 6Amps, I tried adjusting the velocity and acceleration under motor tuning but same results, what could possibly go wrong? Should I change my power supply to a higher 60Volts 12Amps will this suffice my problems and attain rapid speed movements?

[analogman]

I am not sure if the Nike Dunks will help, but it can't hurt. I have collected a list of things that may cause missed steps. Not sure if any here will help you or not:


Pulley slipping
Backlash
Steps per inch are not correct
Coupler set screw is slipping
Pulse width is too short
Slack timing belt
Noise on the signal/no sheilding
Controller computer has too many other apps running
Too much speed, torque is overcome
Drivers getting too hot (120degF is max)
Current set resistor incorrect
Optoisolation might be slow for the amount of steps and speed of communication

I did not come across anything about power supply voltage, but that doesn't mean much.

How do you know you are missing steps and it is not something else (e.g. slipping coupler or belt).

[guy2b1]

I already checked everything you listed none of them has problems I dont have any backlash problems. The problems im having is the actual motor itself even without load or not attached to my lead screw the rotation of my stepper motors has a random stopping causing to miss steps. Im not sure if my power supply is supplying enough power to my 3 stepper drivers and motors. I will try to build another 60Volts 12Amps power supply but this time to supply power to my 4 pairs of stepper drivers and motors.

Powermax II Stepper Motor
Is(dc) : 2.3 A
Po : 71W
w : 1500 RPM
Vs(dc) : 65 V
T: 90deg C MAX
Ambient : 40deg C
Bipolar Series
http://www.pacsci.com/products/step_...xproducts.html

RTA PAVIA Stepper Driver
Model : SDC 05 (old model I guess as I cannot find in their website)
32-65VDC
http://www.rtaeurope.com/rta/

My stepper drivers and motors are a perfect match as I salvaged this from an industrial machine.

[afh]

The irony that you've spared some headache and work if you bought a switched powersupply off from Ebay. Not really expensive. ...of course the learning experience
is priceless.

Look at the range of your stepper driver: 32-65VDC.
Do you really want to destroy your precious old stepperdriver with a too powerful PSU?

I hope that you know that the rectificer increases the voltage with 1.41:
(60V AC -> 84.6V DC , +10% gets 66V AC -> 93.06V DC)

(it's common to calculate a 10% tolerance range on a unregulated PSU)
(okay, okay, in this case I used a 20% tolerance range... )

I am not sure how the stepper motor react when the PSU fluctates at a 10% tolerance range. Somebody who knows/experienced?

Have you tried with only two motors connected, are there still missing steps?

(can you please fix the URL, it's "..." who messes up. I've got really curious about these ********...)