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#31
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Thanks Gerald for clearing this up.
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#32
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Homemade V-Tyre with circlip
Hi Gerald,
I am looking at making my own V-Tyres like you did. On the first picture of this thread you show your own design with a flange, but the drawing M1 20 121 it looks like the flange is on both sides. Is this correct? I was wondering if it is possible to make the tyre in such a way that your bearings are pushed in from one side up against a collar which is part of the one side flange. The other side I cut a small groove in for a circlip to keep the bearings in place. From the forum I gather that one of your first MM are still running on UnHardend tyres. Is this correct? |
#33
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Quote:
From this post, you can see that you only have 2mm clearance on the one side - a 1mm collar will work for that side. On the other side there is a lot of space - easy to fit circlip there. You can make a bigger collar if you move the bearings slightly off center. With the "re-Loctiting" of the wheels, I lost track of which wheels were where. The whole hard/soft wheel thing has become a non-issue for me. Next week we can have a closer look at the wheels. |
#34
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Thanks for that. So if I make the copmlete wheel a little WIDER, it will not catch on anything. At the moment it is 16mm wide. If I increase it to say 19mm wide, will it pose a problem....thinking about Y and Z axis as well.
Just to make 100% sure...all the wheels needed are the same size...46mm OD....X, Y and Z axis. |
#35
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Making the wheel 3mm fatter (1.5mm per side) will chew up the 2mm clearance left for other inaccuracies during the gantry welding. Rather move the bearings off-center if you are re-designing the wheel for shoulder and circlip:
Clipboard01.gif All the wheels are the same size. The mod mentioned above will have a tiny effect on the z-axis (mounting the eccentrics). |
#36
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Can one use VESCONITE in place of the bearings.
See ... http://www.vesconite.com/industry/ap...wheel_bush.htm |
#37
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No, a plastic bush will always be a bit flexible side to side, given that our wheel is only 16mm wide.
I have some spare "tyres", as per the pics right at the top - want to make me an offer via PM or mail? |
#38
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Ok speak to you FACE to FACE tomorrow afternoon 14:00?
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#39
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What to do when one gets bored ?
Since there were no action over the last 3 days let me put some pic`s on the forum !
![]() I tried it and got it right! My interpretation of turning v rollers |
#40
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You took that first pic at 6.44am on a Sunday?? Did the missus make you sleep in the garage again??
![]() That wheel will give you lots of good service. (havn't worn out our mild steel experimental wheel yet - it is on a y-car) That mandrel you used in the lathe chuck is exactly the right way to get the V-groove true to the bore! |
#41
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GERALD
I WANT TO MAKE THIS V WHEELS WHERE DO I BUT THE TYRES AND BEARING CAN YOU GIVE ME THE SITES AND ALL THE SPEC JSLINGERLAND@ROCHESTER.RR.COM |
#42
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Slink , get the laser company to cut some steel for the wheels 1.5 mm over size and use the std bearings as per the spec`s that Gerald gave in his drawings.Bearings you can get from any bearing supplier.Get some extra wheels to play with.
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#43
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. . . . . . I am using Ertalite wheels. They are a bit softer that the steel. . . . .
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#45
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Gerald, So you picked up on the spelling. I sometimes do that
![]() I am monitoring the Ertalyte wheels closely to see how they hold up. So far not a sign of wear. Also the machine runs very quite so it will be a bonus if they last. |
#46
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Ertalyte wheels
Gerald,
The machine has been working non-stop for many weeks now and the ertalyte wheels dont show any signs of decay yet. They have not yet bedded and I think it might be a good alternative. The machine noise is also very low. Kobus came round the other day and commented on the low noise level so I take it must be a lot better than the metal wheels. |
#47
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Marius, that is great news on the Ertalyte wheels.
Kobus's machine has direct drive motors, which makes a machine sound quite rough. I guess his comment was based on this aspect. I don't think that steel/plastic wheels will make a big difference on noise, but I may still be proved wrong. :-) |
#48
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Gerald has anyone tried using brass for the wheels? Think it would work?
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#49
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Brass (or bronze) will also work.
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#50
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Then that is what I will be using... I have a nice bar just the right size for this
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#51
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Gerald,
I cant believe a years has gone already since we started our build. Just to give feedback - the ertalyte wheels still look the same as when installed. The machine has worked hard almost every day of the year. So I think any of the synthetic stuff that has similar properties might work well. Regards Marius |
#52
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Thanks for the update Marius.
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#53
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Gerald, is the bronze suggestion still valid? I want to try my luck at doing the V wheels with my small cnc lathe.
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#54
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Yes, it is still valid
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#55
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I don't know if anyone is still around to read this but the Ertalyte wheels are still going strong on the machine. Almost 15 years later.
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#56
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Hi Marius
That is good to know, thank you for the feedback. Where did you source the Ertalyte? |
#57
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Hi Allan
From our local supplier called Maizey Plastics. I am building myself another machine now so I will go the same route with the wheels. |
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