Well here goes... Aluminium frame router design

[driftspin]

The AXBB-E certainly looks nice ��

Oh yeah.

Hope it serves you well.

Keep us posted.

Grtz Bert.


Verstuurd vanaf mijn SM-A320FL met Tapatalk

[CharlieRam]

Made some progress on the control box but ive just checked the voltage of my toroidal transformer and its 75v �� is there anything i can use to drop the voltage to 68v or do i need to find a 2 x 23v toroidal transformer?

[Clive S]

Made some progress on the control box but ive just checked the voltage of my toroidal transformer and its 75v �� is there anything i can use to drop the voltage to 68v or do i need to find a 2 x 23v toroidal transformer?

What are the windings on the one you have. generally 2 x 24v is ideal but I have used 2 x 25v many times. what is the max is the dc on your drives.

[CharlieRam]

The one i have is 2 x 25v so i was expecting more like 70v��, and the drives are the 2DM860H so can handle the voltage ok

[Doddy]

You might find the transformer has a primary rated at 220 or 230VAC and your stuffing 240 up it, with the proportionally higher secondary voltage. Under load you're going to see a reduction in terminal voltage anyway - so long as the electronics can take the peak voltage okay then I wouldn't lose any sleep on the 75V output. I have a 600W 50V toroidal that also gives me an unloaded 75VDC on the caps, and I chose the same drivers for that reason.

[Clive S]

The one i have is 2 x 25v so i was expecting more like 70v��, and the drives are the 2DM860H so can handle the voltage ok

Probably your mains voltage is on the high side and you are measuring the PS off load

I have used those drives I think they will take about 110vdc but you can also put AC into them straight from the toroidal

[CharlieRam]

You are right Clive, that was tested with no load. The drives do take upto 110v DC and upto 80AC. I didnt think about connecting the toroidal direct to the drives! Im assuming they have their own rectifiers and caps to smooth the currrent then? But i also assume the same 75v would be achieved?
I'm thinking i might test it again in the evening when demand for electricity is higher...i measured it at about 4pm on easter sunday when everyone else was probably out having a bbq!