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The Trike is mine, what are you implying.... :D:D
Just kidding, the beams have been removed again for drilling and tapping 10mm boltholes.... |
Nice work Kim. You are going fast. I am fixing the shop where I just moved to build my "Beast" . I hope to reach your progress soon:D
Keep posting those nice pictures. |
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Today I made some progress again.
The Main beams are now securely fastened to the crossbearers, all bolts have been loctited in the tapered holes, so now they shoul not move again unless I screw them out, The Legs are next to be mounted, and the stabillisers for the legs are to be fabricated after that. So all in all, in a little week I can take down from the supports and set it on the floor, I have gotten 4 rubber machine mounts to put on the floor, and 1 16mm bolt to go right through the leg and into the machine mounts for ease of adjustment to get it level all the way around... When this is done, then it's on with the angle irons and mounting these... Ohh it's so nice with a little summer... :D |
You sound happy. Good! :)
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Ok, then. Now the rack and pinions have been purchased.
32 feet of rack, and 4 pinions for the small price of around $120 US... Again, a dad is nice to have... They can get things for small prices... |
Hope you are going to treat your dad well tomorrow.
(Sean, hope you can see how SOME children appreciate their fathers. :)) |
I have also recieved my cablechain, so now I have this in the house too...
The PMDX Breakout card has also arrived, but damn customs, the just made the board be almost 50% more expensive than I had anticipated. The Card was 81 dollars, but customs here in Denmark add tax for the card, and by god also for the shipping, that's stealing I think,... |
Be glad they allowed you to get it at all. I don't think the PMDX stuff is completely free of lead? Europe banned lead in July last year.
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a little update...
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Been making some stuff on the machine..
Hard work, and tired I am when I'm staying in the garage 3 hours a day... And goinig to work every night, but it slowly takes more and more shape... I have also been making homemade I beams for my new garage... The first 6 are done, and need only be made the right lengthe now, warning, they take quite some time to make... but atleast I have made them in the excact dimensions of the real IPE 120 beams.... |
Update....
Project is standing still a bit, having to many things going at one time is not as smart as it should have been.
But on the bright side, I'm going to be playing with my electrics soon, have just recieved a shipment of no less than 15 centent CNO162 Microstepping drives... And at a bargain to... So looking forward to finding out how many is in fully working condition and how many might have a few snags to work out first... But for the small prise of $24.99 a piece, then I think I can afford to have one or two that won't work... Next is building the Power supply's and such. and having the kitchen counter project started.... :-D |
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More parts have arrived for the mechmate now...
Electrical parts, motors, Centent's and Torroid for the PS, cabinet for the controlsystem. Next up is the capacitors for the PS and 2 E-stop buttons. The motors are 665oz-in Pacific Scientific PowerPack Steppers... The Torroid is 1.15kW at 49 Volt unloaded, and loaded around 42Volt... |
nexen Roller Pinion System
Have you all seen this rack and pinion...
www.nexengroup.com The say it delivers more speed, more accuracy and less maintenance than any other system out there.... Click the link for info... http://www.nexengroup.com/nexen/prod...duct?pn=966500 They even have a small video of the thing in action... |
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Kim,
What marketing claims is…well in my experience & opinion they just never really care about customer needs, ethics and… the environment. Actually, their paid to sell & pusha product not to care or making it better, just making more sales ! As any marketing guy will say or heard “ it’s a new old thing, just redone in a better way !” Seen it, done it and out of it for ever ! People, be careful when it’s sound to good. It will never be said enough !! My opinion. Amicalement Robert :) |
Thank's Gerald...
I'm not planning on buying this, I just stumbled on it, and thought what a nice idea... So what am I doing, trying to build my own version... nice to have a Co2 Laser at your disposal... :-D Nad as far as accuracy, I'm not sure, but I'll see what it will do later this year as I'm trying to get hold of some pretty small roller pinions for the wheel that drives along the rail... The Rail I have already made DXF for, now all I need is the roller.... And Robert... That is very true, but never the less, I'm going to try and make my own rails and rollers the nexen way to, just to try and make it work for me... |
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Having tried a few setups in my little case I have discovered that I think it is a little small, so I have begun making another setup, and building it all into a stand alone cabinet where both computer drive system, and computer screen will be built into, so far this is my electrical back plate...
It is lasercut, and the Riser plate for the Drives is also lasercut... I have also included a little picture of my Homemade Power supply... Delivering 1.15Kw at 77Volt's DC unloaded, and stays stabil at 70Vdc loaded.... Nice, has a little bigger footprint due to the size of the toroidal.. 8 inches... |
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First try of making the rack part of the nexen...
Been cut in 10mm mild steel on the laser at work. Not the best surface, but it's kind of ok... Will try to cut it in 8mm next time, if that works out well, then I'll cut length's in 8mm Domex 650, that ought to hold for quite som time without having to surface treat the material... Otherwise, I'll cut them in Stainless Steel... :-D |
Very impressive Kim. Good luck.
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Beautiful!!!! She's a work of art.
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:eek:...and Doug knows power supplies
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Thank you Doug, I'm hoping to find the needle bearings I need for the pinion sometime soon, so I can make that also...
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I'm also very happy with the build up of it... Now onto tthe wiring of the things... Enough to do....
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Kim, your pinion diameter will be very big.....you will have very little force to drive the router unless you put lots of gears/belts between the motor and pinion.
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You may want to reconsider the location of the bridge rectifier.There was a post recently on CNCzone that showed a pretty ugly failure when the bridge overheated and shorted due to a loose screw holding the bridge to a painted metal surface. You have no heatsink at all for your bridge. If it's very lightly loaded you may get by with it, but maybe not. See http://www.cnczone.com/forums/showthread.php?t=50845
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Mike, I think the CNC zone guys are over-reacting to the "heatsink" not being good enough for a faulty rectifier. The metal case rectifiers are typically good for 25 Amps without any heatsink. On our first MM I also had the rectifier mounted to wood for quite a long time - it stayed cool to the touch. Personally, I don't like wood in the control box because things can go wrong and I don't want surplus fuel for the ensuing fire. In this particular application, there is no "heatsink" concern - it will run cool if nothing is faulty.
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Gerald...
The Pinioon, will have the exact diameter of the real nexen pinion, 47.5mm in diameter... So not so big again. But yes, a belt gear of 3:1 should do the trick, and this was also intended... I'm currently looking into how to build the pinion as it seems needle bearings whis small isn't available anywhere... but I have some ideas around now... |
Hi Kim,
Now with in mind knowing your making your own « laser copy » of the NEXEN system, I find it very interesting. Please keep us posted on your results and findings, it will be interesting to see cost/effectiveness of it as a DIY – laser cut approach. I like that ! Nice approach, keep up the good work ! |
Sure Robert... I will be posting more as it progresses during the next few weeks, I should have a working model ready within a month or so... I need to either get some very small needle rollers or some small bearings that will hold a precision hardened dowl in place so it can turn when it runs the rail... But I'll post all that I can for this homemade "nexen" system.
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Sorry about the slow pace here guys, I have been working too much for the last monthe or so, So I have not had time to work with this yet.
And Now I have gotten a lathe in the shop, so This is being refurbished also... So as you guys see I have more then enough, but I will be doing more on this though... So look back sometime soon I HOPE... |
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Ok... A little work has been done this weekend...
I have finished the base of the table, so Now I'm going to move on to the rails, and pre drilling all holes before painting the whole thing.. Notice, everything on the table is still boltet on, so in case of my moving and beeing unable to find a trailer big enough to transport it, I can disassemble the entire machine.. Yes it's a little rusty at the moment, but It will be sandblasted prior to paint. Oh, I just realised, it's not really all the way done, I still need to mount feet and transport wheels on it... I'm currently looking at som way of adding som wheels which can lift the machine an inch of the ground in case I need to move it around in the little garage I have.. :-D On the last picture you can just see my newly purchased Schuchardt & Schütte lathe... :-D |
Kim,
Looks like you did an excellent job on your table. I like the way it all bolts together. Would make it a lot easier to move if you had to. :) |
Kim, table looks good. I have designed mine to be bolted together as well. If I might ask a question. Why did you bolt the flat (large web)part of the C-channel table cross members onto the beams? I would think that the table would have less flex if they were turned 90 degrees. I see that you have two bolts in each end. Putting them on the flat allows two bolts in each, which will keep the table from racking. Is this the reason? Just curious.
Paul |
Personally I only turned the crossmembers over for the two bolt reason. And having looked around at other designs I found that this would actually do a pretty good Job... Although there might be reason for a little flex, the chassis that I have made makes the machine so stiff that I don't have to worry much about flex... It should be ever so stiff as the original welded mechmate.
But If I had the machines to move an entire mechmate with, Then I would most certainly weld it all together... But sadly I don't and the garage I'm in at this time has not got the height to get a crane in there for moving it.. |
Paul, the "racking" concern vanishes when the table top is screwed down. The table top itself simply cannot "rack".
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Thanks, Gerald. You are right. I didn't think through the process far enough. :o
Paul |
Kim,
Quote:
Normal “profane” DIY-er have to have this hole thing boiled down to a simple & cost effective way. For most, 99%, it is not easy nor cheep to get laser cut parts. You, on the other hand, are lucky ! I to am blessed, I’ve got some few good resources for those, so I’m instigating to get some parts ( 10 10 322 & 10 10 302) done by laser at the same time w/all the others. All & all, for me, not a big if any cost difference vs C channels. Oh, for freight, It’s +/- 10min form my shop !! Another BIG ++ in my opinion...no drilling in those C-channel, all holes done at the same time, better quality finish & tolerances!! BTW >> From what I can see, your 10 10 322 are C channels but your 10 10 302 are bent ones ! |
Hi Robert....
Yes My main beams are C channels or UNP channels if you want... But my crossmembers are lasercut and bent.. The main beams I wanted as straight as humanly possible without having to grind them down on a mill... I would suggest you use the UNP (c channel) for the main beams as you will get the best straightness on top with those.. When you bend a lasercut part, theres the slight chance that the bendingmachine will not bend it all that straight in the middle. It might curve slightly... And considdering the thickness of the steel plate you need to cut it in for the main beams you are in for a surprise when you try to bend it... Afterall, it's almost ½ inch thick steel you need to bend.... So therefore I used the UNP (c channel) there instead.. Yes, the holes are a hell to drill, but it's progressing quite nicely... But yes, I'm very blessed when It comes to Lasercut parts... And I also have a lot more ressopurces present at my work then most other DIY'ers..... |
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I can see the springtime here has given me more energy to proceed with this project..
Again today something has been done on the machine. Still on the basetable though.. First rail has been completed and test fitted and second rail has been predrilled into the main beam... Next is predrilling all the holes and mounting end stop blocks on the rails. I also welded to pieces of rack together to form one complete length of rack. So all in all a very productive coulpe of days for me. I also just did a rail skate at work yesterday, so Now I have one of these too... |
Have you cut the rail to final length before using the grinding skate?
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Hi gerald...
No, oh god no... These rails I have had machined professionally at my dads old work... So these are ready made for me... :-D |
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