I applaud your work and the fact that you share even though I am with Danilo that you could have prevented some mistakes by reading a little more into the forum. Some people only read, and that's not good either ;-)

Keep going.

The progress of painting.

I almost forgot to share this : Cut-off rail piece used as rod for energy chain carriers. That's why I admire this construction, there is nothing to be discarded.:D

I used the cut off of the veerail as carrier supports too.

Finally, all painted and put back.

The 'ugly corroded steel' shined like a diamond.:D

Dark blue color is essential, black for rails and chain supports, dark grey for Y - car ( mixed black and grey colors I got in the workshop ), reason: blue color all gone and didn't want to buy another can.

In meanwhile I used cross bearers for drying tea :).

Looking good.
Good to see another MechMate on a tiled floor:)

Thank you Al.

I haven't posted couple of weeks, but I'm still working and keep reading.
Ok, the next is 'kitchen project'. I can not not resist anymore to laying motors, drivers and electronics that arrived approx. 1 year ago.:)

Mach3 installed on Intel Celeron 1.7 GHz / 2GB RAM, perfect machine as controller.

Stepper motors wired half coil, type 86HS9801, digital drivers Leadshine DM856, toroid transformer 1KVA, 220VAC input / 73 VDC output.

Current rush in 1KVA toroid transformer is so much that blow up fuses.
'SOFT START' electronic device is a must when using transformers over 300 - 400 KVA.

Just for sake of putting information for new members to read I must question last couple of posts.

First this does not look large enough toroid to be 1kva ... seems like my standard ones ~600va.

Capacitor is inadequate for this type of current draw.

don't want to start a war but I thought that wiring bipolar parallel became standard or 4 wire stepper is ok. Never understood this half coil theory.

What makes this relic computer and monitor a PERFECT machine? How did you conclude its perfect, did you test the LPT signals output etc...

Kitchen Project
 

Danilo, I appreciate your experience and knowledge a lot, and it's good above posted infos to be clarified for sake of all Mechmate builders including me.

Maybe it's my fault considering posting pictures, it doesn't look like 1000VA ( by it's dimensions ), when you look at the pic, but it is. It's ordered from www.trafco.rs with CE certificate and so on. Below, the pic of data label. SOFT START cost only 10$, I wanted it as a precaution.


Capacitor is NIPPON 10.000 uF( microFarad's) @ 80V, snap-in type. I wired two in parallel to get 20.000 uF but second one blow up while first run and frightened me so much that I throw away the multimeter that I had in my hand :o. I suppose capacitor was old one.

I understand your concern of stepper wiring. I agree with you that we'll get max power / torque when wiring bipolar parallel. Below curves explain it. I would love it too, who wouldn't ? But that what scares me is that this stepper motor ( 86HS9801 = 34HS9801) when wired bipolar parallel draws 8A current that exceeds driver DM856 peak current 5.6A

I'm not an expert in this field, just logical thinking. I'll be happy if you lead to opposite.

The old PC is 'Perfect' right now cause the 'empty pocket'. But I run the steppers in jog, running some of wizards from MACH3. There was endless happiness they become alive !! Why not using this PC as controller anyway? What difference does it make ? Maybe I'm not thinking the right way?:o

Nevertheless, thanks for you time spent in this goldmine forum with newbies.

Regards,

Borko

PSU Board
 

I want the custom made PSU to look proffesional. Ebay is the right place to find everything you need you can't find at home.

http://www.ebay.com/itm/141906974878...%3AMEBIDX%3AIT

Condensers 'snap in' type also found on Ebay.

http://www.ebay.com/itm/272266721321...%3AMEBIDX%3AIT

Regards,
Borko

Making stop blocks
 

Stop blocks cut, drilled, tapped and welded.

Inductive sensors carriers made of rails cut-off parts.

20mm holes drilled into rails with this amazing 3$ hole saw.
I didn't believe it would remain sharp.:D

Please buy a new computer ! and Danilo is correct.

Yes, new computer and steppers wired bipolar parallel.

Building Z-axis
 

I decided to use Dimitry's construction for Z-axis with lead screw and ball nut.
Dimitry, I hope I got your permission.

There were cut off cross bearer pieces, channel 80x40, but not long enough for already machined lead screw.

Pieces welded and cut to proper length. Alignment checked, seems to be promising.

I'am in the middle of my build, I have done allot of reading on the forum for years and there is so much stuff and 20 different ways of doing something, it is hard to tell what the right way is to do it. Someone will do it one way and 5 others have a different way of doing it. Then you have to people that want to change it and 10 post latter it don't work. Simple thing sometime is hard.

firechief

Yes, there are lotus of ways to do almost everything. The great thing is to get a fine build we don't need the 'most optimum solution' for each thing, we need what works for us!

Don't get to tied down to the details of one way or another. Do what wocrks for YOU. For me, I try to choose one way to do each thing and stick with it for that task rather than changing techniques. For me, that keeps things simpler, and I am more likely to succeed.

Choose, and keep going. ... At least that is my 2cents worth.

Yes, I agree with Jack, do the things that are most suitable for you, If sometimes something goes wrong just go back and do it another way. That's my way, at least experiment is what makes you thinking 'out of the box'.;)

I decided to remove / grind the fillet channel angle where lead supports will lay.
The ball nut travel is 290mm.

I use granite tile as reference surface. 'Body filler' to correct the geometrical imperfect of 60 x 40 tube, than hand sanded on 80 grit sand paper put on granite tile. All tightened and spot welded to proper height.

It took some time to adjust 60 x 40 tubes laying in granite surface.
Calculations for linear rails distance done and marked.

I put a filler layer on scratched metal and sanded.

Final checking with dial indicator 'where are rails' compared to granite surface.

Very thin shims needed to be placed in order rails to be in plane. ( different shims made from different size grit sand paper 1500;2000;3000 ).

Here's the Z-axis finished.

Building belt gearboxes
 

I used Dimitry's .dxf files for belt reduction gearboxes laser cut parts but with my modification. In my case, T5 pulley shaft supports are on both sides with bearings into plates. Reduction ratio 3:1.

Here the building progress in pictures.

More pics.