24volt 10amp transformer

[stirlingnut]

I found this transformer.Price seems decent,should be ok for a DIY'er.They also have some 118oz steppers for $15.00 ea.(with a spec sheet and wiring diagram)
http://www.mpja.com/productview.asp?product=7846+TR

[joecnc2006]

oops double post

[joecnc2006]

Originally Posted by stirlingnut I found this transformer.Price seems decent,should be ok for a DIY'er.They also have some 118oz steppers for $15.00 ea.(with a spec sheet and wiring diagram) http://www.mpja.com/productview.asp?product=7846+TR

I have that trans. and it yieds me almost 33vdc. running my CNC Model 2006 with it, and the Hobby CNC Kit with 200oz motors.

[stirlingnut]

Hey joe,is your hobbycnc board the "chopper"version?And how was the build,work well?

[esmiller]

33 Volts? so this would NOT work with my XYLOTEX driver.. correct? I believe it is limited to 30V.

Eddie

Originally Posted by joe2000che I have that trans. and it yieds me almost 33vdc. running my CNC Model 2006 with it, and the Hobby CNC Kit with 200oz motors.

[Oldmanandhistoy]

Originally Posted by esmiller 33 Volts? so this would NOT work with my XYLOTEX driver.. correct? I believe it is limited to 30V. Eddie

Xylotex load supply voltage including back EMF 35V max.

Recommended maximum running voltage is 30VDC

John

[esmiller]

Is there a way to make a 24V transformer work? will it always end up close to 33V after Caps, and filtering, etc.? Would it be best to just buy a 24V regulated DC power supply?

Originally Posted by Oldmanandhistoy Xylotex load supply voltage including back EMF 35V max. Recommended maximum running voltage is 30VDC John

[pminmo]

esmiller,
This webpage of mine show one simple method: http://pminmo.com/simpleps.htm

I also use the transformer mentioned with 3977's, (same as xylotex). There are other ways to lower the voltage, this is just ceap and dirty. I have two of the transformers and one requires 3 diodes to get me in the 30Vdc range, the other 4.

[Oldmanandhistoy]

Originally Posted by pminmo esmiller, This webpage of mine show one simple method: http://pminmo.com/simpleps.htm I also use the transformer mentioned with 3977's, (same as xylotex). There are other ways to lower the voltage, this is just ceap and dirty. I have two of the transformers and one requires 3 diodes to get me in the 30Vdc range, the other 4.

I hope you chaps don’t mind me jumping in here.

I am very interested it this subject myself.

I need 45V for some drivers I bought recently. I have a 36V square laminate transformer knocking about and was wondering if it could be used. I know the diode method for lowering voltage, but think in my case it would not be idea. Would you be so kind as to point me to information about this subject?

Regards, John

[pminmo]

OMandHT
Several ways to accomplish, each more complicated than the next. What kind of current do you need?

[Oldmanandhistoy]

Originally Posted by pminmo OMandHT Several ways to accomplish, each more complicated than the next. What kind of current do you need?

Hi Pminmo

Very kind of you to give me some of your time, I have read a lot of your posts on this forum and learned a great deal from them. Just wanted to say thank you for all your input on this forum.

The full specifications of the transformer are

Primary 240V
Secondary 36V
Watts 400

I believe that’s 11Amps?

Voltage required to drives 45Vdc Max.

Total current required, 10A but could be a little less.

John.

[pminmo]

Well,
A simple series regulator with a power pass transistor is probably the best bet.

http://www.tpub.com/neets/book7/27k.htm Q1 needs to have a pretty good heat sink.

Probably will have to parallel a couple to get the current you need to parallel several pass transistors such as here:
http://www.zen22142.zen.co.uk/Circui...er/1230psu.htm

I'll try to get something together for you on the specifics, need to run now.