tag:blogger.com,1999:blog-4339813531032979196.post5901655433963081589..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: Mendel90 axesnopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger57125tag:blogger.com,1999:blog-4339813531032979196.post-58958793590560572122012-10-11T03:10:56.545+01:002012-10-11T03:10:56.545+01:00I recently upcycled a fairly large amount of 1/4&q...I recently upcycled a fairly large amount of 1/4" (6.35mm) high quality glass. I have already cut out all the print beds I need. I am seriously considering using it as a base for a Mendel90. I am not sure what the advantages would be, but it will be damn pretty. I imagine bolting m3 screws onto glass is a bad idea, perhaps epoxying the printed parts to the glass would work better. If I can figure out how to get my clear PLA (or PC maybe?) to stay clear after printing that would be best of all. Crystal Mendel :)John Meachamhttps://www.blogger.com/profile/17125734476369772555noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-33840632581777891472012-05-25T21:02:09.127+01:002012-05-25T21:02:09.127+01:00I have only ever needed to oil one LM8UU that sudd...I have only ever needed to oil one LM8UU that suddenly seized in one direction only. IIRC I used car engine oil as I figured it would handle the temperature above the bed.<br /><br />I haven't needed to oil 608 or 604 bearings. I think they come packed with grease.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-31996888888495481362012-05-25T20:50:47.760+01:002012-05-25T20:50:47.760+01:00what oil you said you use in your lm8uu? I'm t...what oil you said you use in your lm8uu? I'm trying to find out one to use in mine, they don't show any extra friction right now, just asking if I need some one day which one should I use... what about the 608 604 bearings, do they need oil as well? which one?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-46323977847478126882012-05-12T10:18:52.276+01:002012-05-12T10:18:52.276+01:00If you have access to cheap extrusions cut very ac...If you have access to cheap extrusions cut very accurately to size then it makes a nice frame when done that way instead of using triangles (like MendelMax), which add no strength in the directions that matter. I expect it is stiff enough<br /><br />When you buy sheets cut to size it is not the size, but the right angles that matter. So they are very accurate. When you use extrusions the lengths and screw positions are what create the right angles so it has to be machined very accurately. <br /><br />In terms of RepRap I think rectangular sheets are far more common in the world than aluminium extrusions, and cheaper.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-38955577224097491602012-05-12T07:45:44.422+01:002012-05-12T07:45:44.422+01:00nophead what you think of this aluminum mendel fra...nophead what you think of this aluminum mendel frame (not the axis or anything else, just the frames)? http://www.thingiverse.com/thing:16076<br /><br />it's clearly not as sturdy as the mendel90 but it might do the work and it uses just a fill of aluminum extrusions that are a lot more "plug and play" (not the best word to describe what I mean but I think you get it) than MDF (or acrylic) plates... what you think about it? for example, I see mendel90 as a great printer design but it's not as easy to a someone new to 3d printing to go and work with MDF or acrylic as it is to work with aluminum extrusions... what you think?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-46700428544789622452012-04-25T08:23:39.408+01:002012-04-25T08:23:39.408+01:00I have built it, wired it up and tested the axes. ...I have built it, wired it up and tested the axes. I don't have time to get to grips with the nightmare that is reprap software at the moment.<br /><br />The acrylic sheets were expensive because I got them laser cut and the one off cost is high. In the UK I can buy acrylic cut to size at close to the same price as large sheets. My plan was to get a large batch made and sell them but laser cutting is not really accurate enough for tapped holes (but mine worked). <br /><br />The acrylic machine looks nice but the MDF version is much cheaper, stiffer, lighter, easier to make and more robust. Here is a video of one made from polycarbonate, which is a little more expensive than acrylic but not brittle: http://www.youtube.com/watch?v=9fcwjsrYD6c<br /><br />Dibond and even solid aluminium are both stiffer and lighter than acrylic, so I am looking at those.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-40875989593647548762012-04-25T06:22:48.753+01:002012-04-25T06:22:48.753+01:00did you finish your mendel90 acrylic? how much did...did you finish your mendel90 acrylic? how much did you get the acrylic sheets for? the bad thing about it is that I can only find 2m x 1m sheets of acrylic here, so making 1 printer that has small sheets of diferent thickness is not cheap :S<br /><br />and acrylic is somewhat heavy, so it gets expensive to buy from a chinese supplier or something like that...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-27100719740321774612012-03-15T21:39:57.174+00:002012-03-15T21:39:57.174+00:00Polypropylene is a common plastic similar to polye...Polypropylene is a common plastic similar to polyethylene but more flexible. It can be bent backwards and forwards many time without breaking so it is often used to make "living hinges" such as Tic Tac lids, so it is ideal for this application.<br /><br />I cut the strips from an A4 document folder, which is why they are bright purple.<br /><br />I haven't found a source in sheet form yet. I did find one in the UK, but they only sell to schools.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-34365803871535401012012-03-15T21:10:21.313+00:002012-03-15T21:10:21.313+00:00This comment has been removed by the author.David Carleyhttps://www.blogger.com/profile/16919676645376203886noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-14352685720803504932012-01-27T19:13:53.466+00:002012-01-27T19:13:53.466+00:00Mendel90 is perfectly fine, though if folks want y...Mendel90 is perfectly fine, though if folks want you to use a different name, Ortho-Mendel might more strongly highlight the right-ness of the angles.Dave Xnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-35916239648066803332012-01-26T18:15:12.125+00:002012-01-26T18:15:12.125+00:00http://www.ebay.com/sch/i.html?_from=R40&_trks...http://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l2736&_nkw=intrabond shows a $18+$15 24"x24" alternativeDave Xnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-35135653063247520282012-01-14T19:09:37.843+00:002012-01-14T19:09:37.843+00:00I bought it on eBay. Sign makers use a lot of it. ...I bought it on eBay. Sign makers use a lot of it. I have been told you can sometimes get off cuts from them free, or very cheap.<br /><br />I think there are also a couple of other trade names for it.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-26342415820408351092012-01-14T18:56:09.294+00:002012-01-14T18:56:09.294+00:00Nice work! So many improved aspects that I would l...Nice work! So many improved aspects that I would like to incorporate into my current printer build. May I ask, where did you get the Dibond? I haven't been able to find it in the US, probably not looking in the right places.spothttps://www.blogger.com/profile/06794343068694390197noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-10936149457366481292012-01-11T14:49:50.535+00:002012-01-11T14:49:50.535+00:00I love this design, will definitely have a go at b...I love this design, will definitely have a go at building one.<br /><br />Regarding the name, RepRap Euclid has a nice ring to it.zzornnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-35745510209706571242012-01-11T13:44:50.228+00:002012-01-11T13:44:50.228+00:00Really neat design. I think this one will be very ...Really neat design. I think this one will be very popular. There are some neat touches here, like the ribbon cable, uneven Y axis bars and pinch bolts. It would make a nice addition to your sales on eBay.martinprice2004https://www.blogger.com/profile/03376554508900532184noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-64543886327810188652012-01-07T15:40:31.436+00:002012-01-07T15:40:31.436+00:00PLA is quite hard so I don't think it deforms ...PLA is quite hard so I don't think it deforms much and I reamed to hole to 10mm, which gave a nice press fit for the bearings and they didn't need any other fixing( I had intended to fasten the flange with a small self tapping screw).<br /><br />The were used underneath the y-carriage of my Prusa, so not much above room temperature.<br /><br />I think the most likely problem is the surface quality of the bars, which I think are rolled rather than ground.<br /><br />I will try to post some pictures under a microscope.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-13882301378256050582012-01-07T14:48:52.253+00:002012-01-07T14:48:52.253+00:00Thank you very much for answering the questions so...Thank you very much for answering the questions so thoroughly! I'm very sorry that my response to the IGUS bearing problem is so late. I tried to find the problem using various datasheets of IGUS, but didn't succeed:<br /><br />Stainless Steel is the material with highest wear,<br />the temperature might be around 60°C and<br />the motion is clearly oscillating (speed > 32 mm/s), the load is minimal and<br />IGUS states that some grease (was unable to find any information what kind of grease) enlarges the valid range of velocity<br />Everything seems to be well in the spec such that the wear should be in the range of 1 um per km. This means about 60 um for 500 hours @32mm/s.<br /><br />My explanation is, that the IGUS bearings are quite sensible to incorrect fittings. The wear is strongly correlated to the pressure. Perhaps a PLA bush is not sufficient to provide the structural integrity necessary to prevent local deformations.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-73031132401981161392012-01-06T17:09:30.714+00:002012-01-06T17:09:30.714+00:00Yes an almost infinite amount more rigidity in the...Yes an almost infinite amount more rigidity in the direction of the X-axis. Even a thin sheet material is very stiff in the direction of its plane. <br /><br />It doesn't shake at all, whereas a Mendel does, Prusa slightly more and I expect a Printrbot a lot more.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-18905674815100001802012-01-06T17:01:15.309+00:002012-01-06T17:01:15.309+00:00Great design. Do you think that the uprights contr...Great design. Do you think that the uprights contribute a lot of rigidity compared to more of a free standing approach like printout or this one http://reprap.org/wiki/Parametric_printrbot_variantAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-69939678948962939892012-01-05T22:23:02.390+00:002012-01-05T22:23:02.390+00:00Go with repbot90
Or mdfbot90
//swedenGo with repbot90<br /><br />Or mdfbot90<br /><br />//swedenAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-1460651765401779152012-01-05T21:26:14.047+00:002012-01-05T21:26:14.047+00:00How about Denelm.. it's Mendel mixed up..
You...How about Denelm.. it's Mendel mixed up..<br /><br />You've a history of using anagrams to name stuff.. Cnut for example ;-)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-55739506129702894322012-01-05T15:34:22.467+00:002012-01-05T15:34:22.467+00:00NopBot90 surely!NopBot90 surely!Tonyhttps://www.blogger.com/profile/01484087951047067412noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-92029376013504090962012-01-05T14:46:08.490+00:002012-01-05T14:46:08.490+00:00Euclid?Euclid?nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-30407489647245113892012-01-05T14:40:24.878+00:002012-01-05T14:40:24.878+00:00palmerbot90palmerbot90Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-36566411157357033962012-01-05T11:34:10.784+00:002012-01-05T11:34:10.784+00:00Just don't call it Titanic, it might sink!
How...Just don't call it Titanic, it might sink!<br />How about following a tradition established by Ford and copied by others -- Capri, Granada, Ibiza, ... names of islands. Drop 'Mendel' altogether ... there is no similarity.<br />Capri RepRap<br /><br />anyway this is WAY off topic!!Johnhttps://www.blogger.com/profile/14604789004068040976noreply@blogger.com