Sturdy and Fast all Steel CNC , my first build

[HipoPapi]

Hi,

Thanks for shearing your design and experiences is looking really good so far. I am planning to build a similar cnc router with a working area of 1100mm by 600mm and 250 on the Z. I still have to figure out how to solve the z axes as the longest bit that I need to use is 250mm by 22mm dia and has to be able to travel on top of the 250mm material block.
I have noticed earlier that you had some issues with temperature changes which has me a bit worried as I need to build the machine at normal temperature but it will have to work at -5 degrees Celsius. Common sense tells me that since it will be in there all the time everything will shrink at the same time so hopefully I should not have problems.
Could you please tell me how much this project cost you so far everything included.

Thanks again for shearing.

[Boyan Silyavski]

Hi,

Thanks for shearing your design and experiences is looking really good so far. I am planning to build a similar cnc router with a working area of 1100mm by 600mm and 250 on the Z. I still have to figure out how to solve the z axes as the longest bit that I need to use is 250mm by 22mm dia and has to be able to travel on top of the 250mm material block.
I have noticed earlier that you had some issues with temperature changes which has me a bit worried as I need to build the machine at normal temperature but it will have to work at -5 degrees Celsius. Common sense tells me that since it will be in there all the time everything will shrink at the same time so hopefully I should not have problems.
Could you please tell me how much this project cost you so far everything included.

Thanks again for shearing.

Sorry have been busy. I have all mounted and finishing electronics and cables.

-So it seems there will be no problem following the design and making 250-300mm Z. Most wisely it seems is to make the sides of the construction deeper, by making the stairs like profiles a bit longer and the Z, keeping everything else same.

-2700-3200eur in materials, depends on how you deal with customs. using quality cables and so.



Now i before i update with pictures and details i have a question. Please sb. help cause my ignorance here is astonishing! I thought all was simple and obvious, but...

I have a toroidal transformer 2x50VAC and Power Regulator Board PSU. So one side of the board says AC1 AC2 AC3 AC4. Here i connect AC1, AC2 to the 50VAC1 and AC3,AC4 to the 50VAC 2.
At the other side it says VDC+ VDC+ Ground Ground Ground VDC- VDC-, so as i need 70VDC i connected Both VDC+ together for the + and both VDC- together for the -, but now i gave 140VDC measured between + and -. What i am missing??? i remember the time at school when + was + and -was-, something changed these years or what?





PS: PSU problem resolved, Neale helped me here http://www.mycncuk.com/threads/7659-...9481#post59481