Haha no smugglers around here ...haha kidding those are everywhere :P
So 50x50 is good for my bench ? That is a good input from somewhere to start!!!
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Haha no smugglers around here ...haha kidding those are everywhere :P
So 50x50 is good for my bench ? That is a good input from somewhere to start!!!
No.. you typed 50x50 cm.. sounds big my friend ;)Quote:
Originally Posted by Nickhofen
50x50mm sounds more like regular tube!
And by bench do you mean the base of the machine?
I've read several times that 80x80 with 3mm thickness is good for reducing flex and resonance. I think it was Boyan that typed that it was the perfect size and he seems to know what he's doing :)
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Lol now I notice the typing mistake I made....lack of sleep shows first signs.
https://m.aliexpress.com/s/item/3270...20cd764bWYizFh
I am about to purchase those shocet connectorst ,since they have 40 days delivery to Greece,are those any good? How many pins per socket to I need?
What do you need them for? ;)Quote:
Originally Posted by Nickhofen
Are you thinking about steppers or maybe switches?
Plan ahead and order with one pin more than you need. I have similar connectors that doesn't have continuity in the shells so I need an extra pin to connect the wire shield. That's assuming that you will use shielded wire?
In theory you could have a big 20-25 connector for plugging everything in with one socket and then route it in connectorboxes on the machine itself.. :D
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Hi Robert,thanks for the fast reply!
I am thinking to use them on the housing box to connect the cables that comes and goes from the electronic housing box.
Something like that:
Attachment 23257
Okey.. but do you want one for each motor and separate for switches or do you want only one big cable?Quote:
Originally Posted by Nickhofen
If bundling several signals in the same cable you loose the screen protection between them..
The normal that I see people using is one for limits and a one each for each motor
And of course if you want e-stop on the machine or probe or something like that.
Steppers are usually 4 signals + shield so 5 pins.
A switch depends on type of switch! But could be +, gnd, signal, shield so total 4 pins.
But it could also be + and gnd without shield for a simple mechanical switch with simpler wire for a total of 2 pins. But greater risk of interference.
So it all depends on your equipment :)
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Ok that's makes everything clear now,thanks!
I just score that today for 80 euros, it is 540x600x20 mm,I am planning to cut it and make the z axis plate out of it.I will use my bandsaw and then my router to make the templates out of plywood and after that I will use the same tools to cut this Ali,as Joe Harris has already done very successfully I must say!!!.:applause:
Attachment 23264
Nice Nick!
You are brave to route that with a handheld router :D
Real action video is a must! ;)
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Welding time!
Workshop is so small even with the extension, that I can not take a full photo of the cnc table,lol , behind me you can see the old wall,it is where are the bricks, the extension is behind it where the blue curtain is.
80x80mm square tubes were used, for bracing I am going with 50x50mm.
Attachment 23454
Haha go go weldmaster :D
You will soon have use of all planning!
Lets not have a race.. have a feeling you will be ready before me ;)
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No way!!! I have no motors, spindle ,not catted the alu plates etc....So, no way! hahaha!!!
Does any one have a good supplier for 2.2kw VFD spindle ? And 4nm nemma 23 motors with 8 cables?
Anyone?
:joker:
4nm motors can be bought from cnc4you.co.uk or zapp automation :) those motors have good specs compared to ebay versions.. the ebay motors usually have high inductance.
Spindle + vfd seems more like a gamble..
Same sellers often ship different quality. Sometimes 3 bearings sometimes 4.
Sometimes with connected earth sometimes without.
No tips for you here....
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Thanks Robert, so the spindle guestion is still a mystery,lol!
Yes, i have bought two of these, one was really smooth and the other sounded like it was out of balance somewhere. Its 50/50 what you get but they are cheap.Quote:
Originally Posted by Nickhofen
Thanks Dave,I will pull the trigger and buy a Chinese one and see what happen!Quote:
Originally Posted by Davek0974
Try this https://www.ebay.co.uk/itm/2-2KW-WAT...8AAOSw-W5Us1mzQuote:
Originally Posted by Nickhofen
Thanks Clive,nice price and it is shipped from Germany,no extra taxes this time ! ;-)Quote:
Originally Posted by Clive S
I just went for a ebay seller that had genuin HY vfd and claimed 4 bearings.Quote:
Originally Posted by Nickhofen
If I got it.. no idea!
Unscrewed the connector on top and no internal earth connection :)
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That is the good part about eshops and ebay ,you never know what you are going to get! Lol.Quote:
Originally Posted by Nr1madman
Of course no internal earth does anyone ever have an earthed spindle?Quote:
Originally Posted by Nr1madman
I think I bought my spindle from same person it works lol about all I can say about it.
I made some progress today.
Attachment 23494
Attachment 23495
Cut one of the aluminium beams I have and use the piece to add stiffness to the L beam.
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Attachment 23499
I made a pass from the table router and cut the aluminium angle straight , something that wasn't possible with the cutting grinder.
Aluminium angle is 5mm thick, I believe it is going to add something to the construction,I hope stiffness and not only weight!lol!!!
Attachment 23500
Nice ;)
I use the end mill chamfering with sunk to prepare the holes,then screw the aluminium angle in place, the axis weight now 8.7 kilos.
I am planing to use Nema 23 4NM,any thoughts?
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Attachment 23520
Good progress Nick!
You dont have to worry about the weight.. will be fine!
How do you plan on fastening the bearings?
Will you use the T slots or drill and tap the angle that you made?
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Hi Robert.Quote:
Originally Posted by Nr1madman
I am planning to drill and tap ,the aluminum angle is 5.5 mm thick and made from hard aluminium,if that option fail I am going to use the T nuts.
I wish a Happy New Year for you and your family!
Happy New Year to all members of this forum!!
We expect some visitors in about one hour but I manage to paint the CNC bench today black and the sides where the Y axis extrusions are going to rest... yellow.:yahoo:
Attachment 23521
Sounds like a plan ;)Quote:
Originally Posted by Nickhofen
I wish you a happy new year aswell, forget the machine and spend it with the family ;)
Opa!
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Looking sweet! Yellow and black go good together :DQuote:
Originally Posted by Nickhofen
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Yellow and black is a cool commination and maches with my bandsaw and thickness planer I have .lol!
Also those are the colors of the football team my son support, the colors i choose is a surprise for him!
I am ready to pull the trigger and order 4x Nema 23 4NM from cnc4you.co.uk , any preferences for a breakout board from there and maybe for drivers?
Or what ever I can order all in once so I wont pay the shipping cost twice, thanks!
Personally I did not like their electronics. Nothing seemed like a bargain :)Quote:
Originally Posted by Nickhofen
Have you thought about motion controllers or/and BOBs?
Was thinking of getting pulleys from there but when I ordered they didnt have htd pulleys. Dont know if they have them now?
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Breakout board is in the list, pulleys is a good idea, I just check and see that they have some!
Thanks!
When you measure the depth of nut housing bracket for ordering your screws, remember that the tapering stops 3 to 4 mm before the maximum depth.
I realize that a little bit late but the fix was easy...
Attachment 23563
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And here is a useful article for guys who do not know (me):toot:, how to assembly the ballscrew with the BF and BK bearing blocks!
http://www.hobbycncaustralia.com.au/...1Ballscrew.htm
You will probably dislike my advice ..
Which is unfortunate, since it is excellent and will help You a lot.
All, absolutely all cnc and mills/routers/machines depend on rigidity.
A common error using linear guides is comparing the max strength of a linear guide to actual work, or load.
A typical old manual lathe, 11-12", has 50 metric tons "strength".
But cutting loads are 50-100 kgf.
The reality is that modern machine tools are about 2% loaded at max vs strength.