That's a nice piece of oak there but if you plan using that for the control cabinet don't. The enclosure should be made from non combustible material, also tannnic acid in the oak will react with the steel.
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That's a nice piece of oak there but if you plan using that for the control cabinet don't. The enclosure should be made from non combustible material, also tannnic acid in the oak will react with the steel.
Just realised I forgot to reply to you about this. Using the script I posted here, the difference in torque required with and without the gas strut is around 20-30% and the absolute value is low enough for a 3Nm stepper motor to work well. I'm guessing a bit with some of the parameters, but suppose you put a 20T pulley on the motor and 30T on the ballscrew, the required torque (taking into account inertia of ballscrew, pulleys, carraige and motor, plus friction of bearings, ballnut etc) for 3m/s^2 acceleration is 0.87Nm without the gas strut which is well within the rating of a 3Nm motor below the corner speed. That means you'd easily get about 3.3m/min feedrate. The torque requirement for the same acceleration with 30:30T gearing is almost twice as much (1.67Nm), but if you use 20:20T it's 1.1Nm. The belt stiffness goes down with smaller pulleys, but it's still higher than the ballscrew torsional stiffness so not too big a concern ...Quote:
Originally Posted by totts
I'd recommend 20:30T pulleys on Z, as around 3m/min should be plenty for this size machine and you get higher resolution compared to 1:1.
Ahhh okay right so steel enclosure will be on order soon! And will add some braces to the frame, dont want this one walking through a wall! Haha.
Thankyou all for the help and advice, adding work... Tut :p haha
Thats good to know! Thankyou for the calculations, surprised at the gas strut adding that little!
Finally some more work, been a bit slow the past couple months with a few problems, but nearly finished the bed,
http://tapatalk.imageshack.com/v2/14...3c6dfdc90b.jpg
Rail slots machined and fixingings tapped!
Ready to bolt the rails on!
http://tapatalk.imageshack.com/v2/14...0bf6cc20c4.jpg
Slots machined and ready to accept 14mm t nuts
http://tapatalk.imageshack.com/v2/14...85a24da3ea.jpg
Next on the list it to fix the rails on and finished grind the surface.
Then purchase the electronics cabinet, start painting and building and adding strengthening bars to the machine stand and a few little odd job bits! Light at the end of the tunnel??!
Looking great, I think this will be a really nice machine. Great stuff. G.
Ahh ahh ahh . . .. You poor dillusional Fool.!! . . . It's only just begun.!!!. . .LOL:joker:Quote:
Originally Posted by totts
Nice work by the way, impressive.!! . . . . wish I'd got a big surface grinder it really does make a difference in accurecy and finished look.
Thankyou, Yeh they are awsome machines, shame they are so damn exspensive! Lucky to be able to use one really.
Just changed all the countersunk screws to stainless ones, they were jolly tight! Doing their job !
More progress today, cut the rails to length and screwed them onto the bed,
http://tapatalk.imageshack.com/v2/14...057dd726e4.jpg
Countersunk screws and dowels in place,
http://tapatalk.imageshack.com/v2/14...551d8dcc64.jpg
http://tapatalk.imageshack.com/v2/14...4f2291c138.jpg
http://tapatalk.imageshack.com/v2/14...c330fd38e1.jpg
http://tapatalk.imageshack.com/v2/14...5eda1c8332.jpg
Hopefully get it finished next week :)
Great workmanship, it's a thing of beauty, the T slot bed especially.
Looking really nice !
Question 1: What is the orange/red'ish color coming from the bottom of the rails?, looks like a layer of crafting felt or something?
Question 2: Am I right in thinking that, the dowels allow for fine adjustments of the rail towards the Datum Edge ?
.Me
Thanks,
Lee, its copper grease just running out a bit, didnt want any of the coolant corroding the bottom of the rail and causing the table to lift, although minimal i may aswell do it while i can.
Yes the dowels are there to push the rails towards the machined datum edge. Both edges 'should' be parrallel with one another.
Ah right both cool ideas I haven't seen before so thanks!
Have you dialed them in with an indicator as well?
.Me
I will run a dti over them when i put the blocks on, but should be parrallel as the steps were machined in one setup. Touch wood!
So more progress!
http://tapatalk.imageshack.com/v2/14...c5f6f9b081.jpg
Added the holes to fix a plate onto the back of the main pillar
http://tapatalk.imageshack.com/v2/14...41a0b401b4.jpg
Mocking up the plate ready to drill and tap 20 holes with a hand drill :(
http://tapatalk.imageshack.com/v2/14...603f467d6f.jpg
http://tapatalk.imageshack.com/v2/14...a4b7c8cfe3.jpg
http://tapatalk.imageshack.com/v2/14...c354d1f5b8.jpg
Y axis plate all mounted with rails too, time to start adding the rest! Will be starting to get heavy!
Heavy z pillar going on now. Weathers starting to get cold now so i need to start priming some of the metalwork to stop it from rusting.
http://tapatalk.imageshack.com/v2/14...5797301a0e.jpg
http://tapatalk.imageshack.com/v2/14...14229a5e34.jpg
Looking very nice!
Very nice build, I especially like the T-slotted x-axis bed.
Dave
It is I'm very envious and can wait to see her cutting...
.Me
Thanks both of you, been really slow progress the past couple months had a member of family in hospital about a 100miles drive away in plymouth. And my daughter is due very soon so is going to be slow from now, but hopefully will get some time in the garage, :/
Looks like proper quality, spot on.
Started off looking awesome - now its getting better!!! G.
http://tapatalk.imageshack.com/v2/15...4082e20ded.jpg
http://tapatalk.imageshack.com/v2/15...860b984b6c.jpg
http://tapatalk.imageshack.com/v2/15...775c9fa893.jpg
http://tapatalk.imageshack.com/v2/15...19dc31f9a8.jpg
Finally after waiting for a few parts in the post, limit switch and oil lines are all in place, y axis is complete, now for the x
Some of you may have noticed the m8 holes are close to the edge on the ball nut holder, unfortunately the dimensions i was given for the limit switch were wrong and i had to change the size to get it to fit. Grrr
Well done. This site shows just what super work some people are able to produce. That is looking great. G.
first time ive seen this thread; just read with much interest. looking forward to the updates
i like it, what are you using to drive the oil down the tubes ?
A couple of ideas, one is to either attach them onto a manifold with individual grease nipples, or attach them to an oil resivoir and attach a valve to presurise it to push the oil through.
I obtained small 220V pump from an iron or steam cleaner, not sure. Payed 2 euro on a boot sale. Similar to the ones used in cars, that throw water on the front glass. However i prefer the 220V version cause no messing with transformers and so plus it vibrates instead of rotates, so pumps slowly, exactly what we need. The one i have is something similar to this one , checked it with oil and it works. Believe the flow is adequate for the purpose.
[QUOTE=silyavski;65874Believe the flow is adequate for the purpose.[/QUOTE]
Are you sure the pressure output is sufficient?
Not sure. But pressure for what? it just has to move the oil down, hence slightly help the gravity. Oil, not grease. Your oil system has pressure?Quote:
Originally Posted by Jonathan
Getting cold in the garage ! :( need to make more bits now as ive nearly ran out of things to put together :s
Beds on now yay! Hopefully there to stay!
http://tapatalk.imageshack.com/v2/15...ec2756d1db.jpg
http://tapatalk.imageshack.com/v2/15...757eac57be.jpg
http://tapatalk.imageshack.com/v2/15...885ea92899.jpg
And some more oil feed lines
http://tapatalk.imageshack.com/v2/15...1e9d9a1b9c.jpg
http://tapatalk.imageshack.com/v2/15...0a2d766d55.jpg
Hi,
getting better and better. What size tubing and quick connector to screw to the linear carriages?
The are m6 in the carraiges and 4mm tubes with 2.5mm id
I'm interested as well tots, any chance of some links or a point as to where you got them, "well gel" of your build mate.
EDIT: Are they hydraulic connectors when all said and done ?
.Me
Sily, just search ebay for "air line push-in connectors" and they all come up, sweet !
.Me
Just old ebay,
http://pages.ebay.com/link/?nav=item...d=261300410237
The some 4mm to 6mm connectors
http://pages.ebay.com/link/?nav=item...d=121140904969
Yeh thats the fellas haha,
Cheers mate looks like we posted at same time, this listing offers them all under one hood (the types you can get).
Pneumatic Push In Fittings Connector for Air/Water Hose & Tube Airline
http://m.ebay.co.uk/itm/131275393725
Blimey quite a while since i last updated, few things have changed but not many, due to the birth of my daughters i have been distracted :) haha.
Things are starting to get rolling again, ive had my spindle and vfd delivered, ive managed to get the bed running fairly parallel (within 0.02mm).
Surprised at how well these rails and carraiges run, i had the bed extended fully to one side, placed the dti on the bed and hit one end and it didnt even move 0.01mm :) very happy!!!
Anyhow z axis is being built, all plates and material has been machined, just needs assembling, need to start sorting out cable management :(. Pictures will follow soon!
:applouse::applouse: :beer: Congratulations!Quote:
Originally Posted by totts
Totts,
Wee want more! Weee want more !?!?
.Me