NordicCNC's build log

[NordicCnc]

Talk about keeping us in suspenders,??? . . . . Was the pitch wrong.?

Sorry, the pitch was of course correct! Thanks for having me double check, I dont think I've realized unless until the build was finished!

About building the enclosure into lower frame with aluminium plates is a good idea. I have a large 2mm aluminium sheet lying around that I could use. For the next step I will lay out the electrical components in 3D and make a wiring diagram to ensure I have accounted for everything.

I've seen that atleast both DMM and Sunfar recommends either mains filter or both mains filter and line reactor for the mains power supply. I have seen people here using line filters but I haven't come across anyone using line reactors yet. Is that really as necessary as the manufacturers are claiming it to be?

Also mounting the electrical enclosure directly to the frame (made of aluminium) would it be a problem since it would basically be in direct contact with the machine frame? I mean that would be a direct earth connection for the enclosure. I am not too into electronics (yet)!

Thanks everyone for your good and helpful advice!

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[Clive S]

Also mounting the electrical enclosure directly to the frame (made of aluminium) would it be a problem since it would basically be in direct contact with the machine frame? I mean that would be a direct earth connection for the enclosure. I am not too into electronics (yet)!

No. That will be fine just make sure that all grounds go to one star point. If the frame is painted I would make a direct connection from the box to the frame.

[JAZZCNC]

I've seen that atleast both DMM and Sunfar recommends either mains filter or both mains filter and line reactor for the mains power supply. I have seen people here using line filters but I haven't come across anyone using line reactors yet. Is that really as necessary as the manufacturers are claiming it to be?

Also mounting the electrical enclosure directly to the frame (made of aluminium) would it be a problem since it would basically be in direct contact with the machine frame? I mean that would be a direct earth connection for the enclosure. I am not too into electronics (yet)!

I would at least fit a mains filter because of them being Servo's, however, I have seen that some people have had issues with DMM servo's because they didn't use line reactors so you might want to fit them to be safe, or just go with mains filter and if you get any issues you can always slip a line reactor in between.!
It mostly depends on your incoming supply quality I think and I seem to remember those who have had issues where US based which works on different Freq and voltage to EU.

Regards the frame then yes it's fine and you would want the earth to the frame anyway for safety just in case a wire shorted to the frame.

[jarjar]

I can assure you that 800x600 is too small :)
This is what I have and everything is cramped inside.

I bought mine from rs-online, price seemed reasonable.

[Sterob]

My next build I'm going to look at using small extrusion for a enclsoure frame, then one can make it any size one wants.

[AndyUK]

I dithered for ages about this, feels like they should be cheaper.

In the end I went for a Tempa Pano EKO, which enabled me to have a glass front. From memory, the non-glass version, 800x600x300 was about £115, with glass circa £130.

http://www.tempapano.com/en/eko/

Is it overkill? Yeah. Is it nice? Uh-huh.

Space wise, I think its about right... theres plenty of room left in mine, and allowed lots of space for airflow and future expansion. But, honestly, I'm not using most of the depth and its all about how you want to package it. I could probably have fitted the same components in 500x500 or less. Have a look on my log for a reminder of how full up my cabinet is, page 9 post #87 has a photo.

Alternatively, I also looked at used server racks, which seemed like a viable option.

[NordicCnc]

So I have installed 2 linear rail carriages just to test how they perform. Once again to my surprise, both of the tested carriages are running extremely bad. Same as in Joe's video. I am not sure if this is normal. I didn't apply any grease yet, I will try with grease applied tomorrow also. But I figure they should at least not bind/stagger every 10mm even without grease??

https://youtu.be/b_DDT43lBIc

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[JAZZCNC]

Well first have you got the bearing reference edge and rail reference edge-aligned.?

Also, they can feel stiff at first, esp when unloaded, just put some weight on them and feel how they slide. I think you'll find the slide easily with weight on them and greased up.

[NordicCnc]

Well first have you got the bearing reference edge and rail reference edge-aligned.?

Also, they can feel stiff at first, esp when unloaded, just put some weight on them and feel how they slide. I think you'll find the slide easily with weight on them and greased up.

Yes I have those aligned. I reached out to Free and he said that it is most likely the plastic seal that is not aligned correctlt and thay it should be easy to fix. I will report back how it goes!

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[JAZZCNC]

Yes I have those aligned. I reached out to Free and he said that it is most likely the plastic seal that is not aligned correctlt and thay it should be easy to fix. I will report back how it goes!

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No I very much doubt it. The plastic seals don't grip that much and not something that misalign because of how the bearings are put together.
Normally I don't get trouble with Hi-win bearings needing cleaning from new but if it feels like just one of the bearings is doing it then it may be worth taking apart and checking there's no debris in it.
They are very easy to take apart and rebuild, just do it inside a tray because the balls go every where.

Personally I think they will be ok and your feeling the normal Sticky clicky notchy feeling they can give when dry and new. Obviously very difficult to now without feeling them.