The video shows a nice move, you are close now !Put motors ,electronics ,spindle and ready to cut before Christmas,right?
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The video shows a nice move, you are close now !Put motors ,electronics ,spindle and ready to cut before Christmas,right?
I certainly hope so ;)Quote:
Originally Posted by Nickhofen
Im about to have another child soon so if it sleeps alot I might get lots of time in the shed with the machine :D
Feels like I'm all over the place with the build right now. Been working on bits and pieces of different axis at the same time as planning the electrical enclosure.
If I only focus I probably will get results faster.
Still have to buy toroid, spindle bracket, htd belts and 2 more motor drivers.
Oh! And a suitable screen for the pc.. preferably with some kind of swivel mount :D
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if it sleeps a lot.... So 2019 then lol ;)Quote:
Originally Posted by Nr1madman
Hahahaa you are probably right ;)
I'm betting on that my girlfriend will sleep for 6months after this pregnancy. So the baby's mood will be my problem. Is it legal with valium for newborns in UK? :D
You need someQuote:
Originally Posted by Nr1madman
https://en.wikipedia.org/wiki/Laudanum#History
We used to feed it to our kids to help them sleep lol, nothing like some opium to keep the young 'uns quiet.
With one of my kids, you could take the lid off the Calpol bottle, hold it under her nose, and she would be out like a light for the night. With my son, you had to hit him with the bottle...Quote:
Originally Posted by Desertboy
This is what I love with this forum. Sound advice!! ;)
It's time to ask for help.. this might drive me insane.
Been working on my Z axis.
The ballnut bracket didn't really fit under the dropplate. I could squeeze it in but it jammed in the ends so I took a file and sandpaper and reduced it about 0.5mm in hight. Now it slides perfect under the dropplate. When I then tighten the bolts that hold it to the dropplate the ballscrew turning becomes stiff and "juddery" in one direction. Smooth but with a little resistance in the other direction. Something must be crooked?
The ballnut is really smooth without load and I can pull it either direction to make the screw turn.. what should I check and do??
how did you file down the bracket?
I'd be worried that you introduced an angle on that, and when you then try to clamp it to the plate it is pulling the screw out of parallel.
Congrats on the imminent kid - I've just spent most of this week in hospital with my 5 week old :nonchalance: (he's fine now, gave us a bit of a scare and enjoyed a good long stay at hotel NHS). Difficult to work on the machine from a hospital room!
Thanks for the congrats ;)Quote:
Originally Posted by Zeeflyboy
Good to hear that you're kid is better! Its never fun to be at a hospital with small children..
I have calmed down and thought about this problem and I'm sure that you are right. Thought I was carefull with the file but you never know ;)
The bad thing about this is that it was my last stock of 20mm aluminium. Gonna screw everything apart and measure some and see if it's fixable otherwise I have to order some new metal. Maybe steel instead as the aluminium is actually feeling flimsy compared to all the steel on my machine ;)
Got some more work done :biggrin:
https://www.youtube.com/watch?v=DH4P5EAhbLI
nice to see it's moving smoothly! did you sort out your screw binding issue?
Thanks ;)Quote:
Originally Posted by Zeeflyboy
Yeah the screw is working fine now. I found out that one of the screwholes in the ballnut bracket is a little off. Since I have to remake the Z dropplate anyway the easy fix was oversizing the mating hole for the crooked screw. 7mm instead of 6 was a winner ;)
Now I have to secure the dropplate or it will slide to far down!
Still waiting for the htd belts to arrive and I'm hoping the motor will hold it even powered down. How do you guys solve this issue? A block under z when the machine is powered off?
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All my machines have always held in position switched off.
If your Z is particularly heavy or you are using a longer pitch ballscrew I guess you need to think about either a counter balance of some sort (which will help your stepper out if the Z is particularly heavy) or some sort of lockout system to hold it up I guess.
Good to hear ;)Quote:
Originally Posted by Zeeflyboy
I have 1610 screw for my Z. Ordered 1605 but got wrong pitch delivered. Full refund from Mr China man so I have compensated with pulley ratio to the motor.
I think my Z plate is several kgs in weight. 15mm thick steel around 160x 300mm big..
Will remake it in aluminium at a later date ;)
Really hope it will hold without dropping, have to see when the spindle bracket arrives!
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Okey.. electronics question coming up!
Planning on making a "standard" 68-70v diy psu.
Have a bridge rectifier already and waiting on 2x24v 500va toroidal transformer.
Found a bag of capacitators in my shed.
100v 1000uF each. Have around 20 of these.. have seen most of you use 3 or 4 of 4700uF..?
Okey to use these that I have?
If it sounds good.. how would I connect them? It's the round type with long thin legs for soldering to a pcb.. but there will be to much current for using breadboard or something like that..?
Thinking about stripping 1.5mm wire and twisting the capacitator legs around it and soldering in place. Then shrink-wrap for personal protection?
It will be a long row and lots of solder points... but I don't have to buy more parts for it ;)
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Sounds like a plan. You would need 3 rows of 5 all in parallel and tie them together with a big zip-tie
Small update.. as usual Im doing a little work everywhere :D
Made some adapter plates for bf/bk bearings.
Started soldering my capacitorbank aswell.. but no pics of that til it's finished!
When you work on the machine for 30-60mins per day it feels like nothing is progressing.. Wish I could get a whole day to spend on this ;)
Some pics for those who want to see..
https://image.ibb.co/ds7jMR/20171019_133402.jpg
https://image.ibb.co/gcE9o6/20171019_132235.jpg
https://image.ibb.co/iZw0vm/20171018_103843.jpg
https://image.ibb.co/icvh86/20171018_103738.jpg
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Nice to see that you have make progress!
The extrusion you use has 10mm slots? From where did you buy the T nuts?
Nope!Quote:
Originally Posted by Nickhofen
I have 8mm slots with 40mm between the slots. That's why I had to make the adapter plates for the gantry. With 45mm extrusion the bearings could be bolted straight on.
Found this out to late in my planning.
Already had the side plates made.. ;)
One thing to do different with mk2 :D
I bought a bag of t-nuts from ali express.
They cost crazy money if bought locally in Sweden ;)
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The distance between BK12/BF12 fittings is 46mm they do fit but it's less than perfect, my gantry is fit like this. I made adapters for my bottom axis (With the proper 46mm spacing) and you can tell the fit is better.Quote:
Originally Posted by Nr1madman
Attachment 23083 look under P
Personally if I build with extrusion again I will make adapters for all the BK/BF fittings. (A non issues for the Z of course)
T Nuts are expensive here I spent £45 on just over 100 to fit my Hiwin's.
Ouch! I bought 50 tnuts from aliexpress for around 10-12£ with shipping included.Quote:
Originally Posted by Desertboy
Got no VAT either :D
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Got ahold of grease nipples for the ballscrews and lithium grease today.
Good news, the slides run much quieter and maybe a little smoother. The ballscrews are definitely quieter!
Bad news, the end seals on the linear bearings leak a bit of grease :( might just be that I tried to fit to much grease :D
I pumped once, slid the axis back and forth for distribution and then pumped again and got leakage. Normal or bad quality bearings?
Worse news, after greasing the ballnuts they spew out dirt and debrie from the seals unto the ballscrews. Should have cleaned them before screwing everything together!
It's not so many screws to dissasemble but the end bearings are pressed on and I don't have a proper remover (don't know the English word for it) damnit!
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Hmm Tap,tap...gouhh tap tap....anyone here!:courage:
Haha its slow going :D
My 4 weeks old son is taking all my time..!
Got some work done on my y axis.. might be able to get some shed time tomorrow and post something if you want? :)
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Nice for the son that say little not understanding words already, I now that the free time is too little over there,I am just teasing you since I do not have nothing better, about cnc stuff to do,lol!
And please post that Z axis work , since this is the most complicate work for me to do....haha.
Ps I spend two hours today at Airport customs ,grate experience ....:toot:
Small ghetto update today!
Made a bracket for my y axis.
Had forgotten to calculate with the adapter plates for the bearings that I made so I had to add a spacer :(
Also my aluminium stock is running low :D
Had to use 2pcs of 4mm thick aluminium for my bracket instead of the planned 10mm. The upside is that I could cut a hole through the first piece for the ballnut bracket to fit. Had planned to pocket into the 10mm piece. Now I didn't have to :)
Also I did a motormount for the Y motor.
Will revisit it sometime later with a file and some different screws ;)
And some pics
https://image.ibb.co/jQ4Oqw/20171111_130913.jpg
https://image.ibb.co/gUzZxb/20171111_130938.jpg
https://image.ibb.co/jrHbAw/20171111_131123.jpg
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Sorry about no Z axis pics today ;)Quote:
Originally Posted by Nickhofen
Just realised why all my holes for the Z axis rails were wrong. In the cad I got the outline of the holes instead of center of the holes. No wonder it did not work and I had to drill larger holes and use nuts instead of tapped holes.
Realised this is the same problem with my holes for the spindle bracket :(
Really have to remake the Z axis dropplate and make it work soon ;)
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Sorry to hear about the misalign holes mistake!
You know what.. it's actually okey!Quote:
Originally Posted by Nickhofen
Im not even mad about it (I usually am)
I put this down as learning ;)
To bad that it's a part that I can't remake myself but have to get cnc'd
I'm way to bad at marking and drilling holes accurate even if I order flat aluminium hehe
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That attitude is good, I like positive thinking something I want to keep under all situations...I hope to keep it at my cnc building too,lol!!!
Bought a supercheap dti with magnetic base and started checking my ballscrews as Im getting some binding and wobble.
After shimming some bk/bf bearings its much better. Still get some wobble as the screws are not quite straight. Or it might be the end machining...
Im measuring about 0.2-0.4mm of wobble in the different screws. Anything to care about?
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Progress!!
Not much done but it feels great to have mounted the spindle :)
Have misplaced a bracket I made for the cablechain.. Will have to make a new one ;)
https://image.ibb.co/dLPSdR/20171120_140004.jpg
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Wow it looks good!!!!
Thank you :DQuote:
Originally Posted by Nickhofen
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Do you have any plans for this machine? Looks like a great machine so far :)
Haha thanks ;)
No plans yet.. have to make it work first :D
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Some questions for you all :)
Have had no time in the shed because of sick kids so no progress, only planning.
Thinking/planning the electrical stuff and think I have the normal stuff sorted out like psu and motors..
Question 1.
Enable signal to drivers.
Should you use it and why? As I understand it it's normal to skip it? Do understand that you can use it to clear driver errors if they should occur..?
If I should choose to connect them it's just 5v to ena+ and parallellconnect ena- to the enable port on the bob?
Question 2.
I have this Chinese bob
https://image.ibb.co/kag1jb/mach3_br...otor_drive.jpg
And I found a nifty schematic here on the forum. Think it was Jazz who posted it. It says how to connect the bob to the vfd to control it via software. On/off and rpm via 1-10v. Have the HY vfd so have to change parameters pd001 and pd002. It sounds good! Then I found this schematic from routercnc
https://image.ibb.co/hex2qG/tapatalk_1511815713547.jpg
Here he has buttons and relay to start/stopp and a pot for speed. This appeals to me as I love panel buttons but I want to have the software option as well :)
Is it possible to connect both kind of systems?
Question 3.
Was planning to follow a schematic from jazz for the general safety layout. Bet it's familiar to you all
https://image.ibb.co/bxXMZb/tapatalk_1511818717673.jpg
Then I found this from eurican (spelling might be off here)
https://image.ibb.co/jthYfG/tapatalk_1511816242127.jpg
Here he has a switch for the limit override and a buzzer so that he doesn't forget to reset it to limits.. is this safer than the momentary switch in jazzes schematic? Or just that you don't have to hold it in while jogging off the switch?
Thank you for your thoughts :D
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Will answer myself :D
Question 3, reread euricains thread and found the same discussion. (Maybe that's why I had the question from the start hehe)
So if you can reach it's better with button instead of switch so you don't forget!
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Another questions for you all!
Will have my pc in my controlbox.
Is it safe/okey/good practice to use 5v from pc psu or should I use the nice chinese psu that I have bought?
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