tag:blogger.com,1999:blog-4339813531032979196.post3336577197725432860..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: Mendel90 extrudernopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger22125tag:blogger.com,1999:blog-4339813531032979196.post-90999948754463376262012-07-31T14:31:24.307+01:002012-07-31T14:31:24.307+01:00Brilliant guide, thanks for sharing this.Brilliant guide, thanks for sharing this.Cadischhttp://www.perforated-wire-mesh.com/screens-and-filters.aspnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-37003774317566749462012-07-06T21:20:53.971+01:002012-07-06T21:20:53.971+01:00It's a parameter in wade.scad. I set it to 16m...It's a parameter in wade.scad. I set it to 16mm as the default as that is the most common size for J-Head, etc. At the time I designed the machine I was using 10mm ones but they all failed so I am trying J-heads at the moment.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-21436687961477026272012-07-06T20:51:35.322+01:002012-07-06T20:51:35.322+01:00Hi You say here that you use 10mm hot ends but th...Hi You say here that you use 10mm hot ends but the extruder body I printed seems to have a 16mm hole for mounting. Am I missing something?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-91685785785040201252012-05-10T21:54:57.247+01:002012-05-10T21:54:57.247+01:00Check that it doesn't limit the X travel as th...Check that it doesn't limit the X travel as the motor is at an angle on Greg's so I assume it sticks out further.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-61262745996264343122012-05-10T21:42:26.081+01:002012-05-10T21:42:26.081+01:00Oke, thanks.
I will use a gregs hinged then, with...Oke, thanks.<br /><br />I will use a gregs hinged then, with groovemount :)<br />like this one: http://www.thingiverse.com/thing:12661Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-24038932182038312952012-05-10T19:30:38.058+01:002012-05-10T19:30:38.058+01:00I have fitted one. The slot doesn't line up wi...I have fitted one. The slot doesn't line up with the fixing screws but it is close. I drilled it and put the screws through. It would be better to get a blank one as the off centre slot makes the drill wander.<br /><br />I have never understood how groove mount works. The hot end mount has to be absolutely solid as minute movement at the top would make the nozzle wander.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-51874735049114606872012-05-10T17:53:20.669+01:002012-05-10T17:53:20.669+01:00can the J-head with groovemount be fitted to the e...can the J-head with groovemount be fitted to the extruder body?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-51475029439000854512012-03-02T08:38:25.064+00:002012-03-02T08:38:25.064+00:00Yes the pulley doesn't need hobbing. It was ju...Yes the pulley doesn't need hobbing. It was just an easy way to make a semi-circular channel without having a semi-circular tool.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-20108632762993843522012-03-02T01:24:59.147+00:002012-03-02T01:24:59.147+00:00Oh very good then.
About the brass ring hobbing t...Oh very good then.<br /><br />About the brass ring hobbing though, if it's not pulling and just pressing it should remain smooth and energy is not wasted deforming that side of the filament for no reason. Just my thought there.<br /><br />I'm really looking forward to your release version(s). Your Mendel90 is just fantastic so far by the looks of it.<br /><br />I love it.Chas Mchttps://www.blogger.com/profile/12728786428277982898noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-89656807239401557412012-03-02T00:45:04.494+00:002012-03-02T00:45:04.494+00:00Yes I have seen that. They are rather expensive th...Yes I have seen that. They are rather expensive though. I did a similar thing by pressing the bearing into a brass ring that I had hobbed the same way as the bolt.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-60056350251050558812012-03-02T00:17:16.170+00:002012-03-02T00:17:16.170+00:00Man I love what you have done and are doing.
Do y...Man I love what you have done and are doing.<br /><br />Do you know about this grooved bearing?<br /><br />Maybe it would reduce feed friction by not compressing the filiment so much?<br /><br />http://www.ebay.com/itm/Grooved-Bearing-use-any-printer-using-Wade-hobbed-Extruder-drive-/130648464693?pt=LH_DefaultDomain_0&hash=item1e6b415d35<br /><br />:)Chas Mchttps://www.blogger.com/profile/12728786428277982898noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-33099566570972606602012-02-18T16:58:10.705+00:002012-02-18T16:58:10.705+00:00I wouldn't use PLA for any of those uses as it...I wouldn't use PLA for any of those uses as it can easily melt. It also creeps under pressure so screws don't stay tight.<br /><br />If you are only going to use the machine to print PLA then you can get away with making it from PLA but you have to keep the motor current low, bed temperature low and have a hot end that is well insulated.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-5711891988771593392012-02-18T16:40:48.815+00:002012-02-18T16:40:48.815+00:00Hello Chris
what material do you advise for printe...Hello Chris<br />what material do you advise for printed parts?<br />I'm not very keen on ABS... I print only with PLA<br /><br />Is PLA suitable for part close to temperature, like extruder body, stepper motor mount, or timing belt pulley ?<br /><br />regardsThierryhttp://tmonnot.free.fr/Fraisage/Ninos_Repstrap/Ninos_Repstrat.htmnoreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-30485342287068001472012-02-15T22:21:32.352+00:002012-02-15T22:21:32.352+00:00The extruder little gear wears out first. It tends...The extruder little gear wears out first. It tends to crack with all the backwards and forwards motion. If not the teeth wear down and fall off eventually. I print it with 100% fill these days. The big gear lasts a lot longer. The other extruder parts eventually develop stress fractures and fall apart. This is after months of 24 / 7 printing in a chamber at 45C.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-27028011041659752092012-02-15T21:55:47.570+00:002012-02-15T21:55:47.570+00:00Nophead, what parts wear out fastest in your exper...Nophead, what parts wear out fastest in your experience? (what part of the extruder assembly?) I just got up and running, and now I am curious what I should have on hand.<br /><br />Ben--ben--https://www.blogger.com/profile/04782454547278545444noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-49750342878260816252012-02-15T20:08:35.903+00:002012-02-15T20:08:35.903+00:00I`m not a big profi in reprap building, but I woul...I`m not a big profi in reprap building, but I wouldn`t recommend anyone to build something from this files. ( <br />Really have author try to make something real?Anonymoushttps://www.blogger.com/profile/03758121936587087626noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-36173792059208158112012-02-15T19:39:53.907+00:002012-02-15T19:39:53.907+00:00Hey, we are still waiting for urs )Hey, we are still waiting for urs )Anonymoushttps://www.blogger.com/profile/03758121936587087626noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-54588160536278449482012-02-15T19:33:55.583+00:002012-02-15T19:33:55.583+00:00Yes no need to publish mine now, saved me a load o...Yes no need to publish mine now, saved me a load of work.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-53889613044751564592012-02-15T19:21:42.297+00:002012-02-15T19:21:42.297+00:00There is a Mendel90 on thingiverse now I think som...There is a Mendel90 on thingiverse now I think someone got tired of waiting for the original source to produce something. You can get the sizes of the MDF from this blog and if you already have a 3D printer you can print off the parts on thingiverse and make yourself a Mendel90!ipblythehttps://www.blogger.com/profile/08565129362898486734noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-35881144188945884682011-12-31T03:47:15.136+00:002011-12-31T03:47:15.136+00:00Excellent! I'm interesting in purchasing somet...Excellent! I'm interesting in purchasing something like this if you decide to make them available.James Newtonhttps://www.blogger.com/profile/12037091869641832295noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-42326070373526523602011-12-30T08:10:58.027+00:002011-12-30T08:10:58.027+00:00Hello James,
The drive is via an M8 steel bolt t...Hello James,<br /><br />The drive is via an M8 steel bolt that has been "hobbed" by running it against a tap spinning in a lathe or a drill. That makes a groove in the bolt with teeth to grip the filament. See http://hydraraptor.blogspot.com/2009/04/all-torque-and-no-traction.html for the technique.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-20898150541837531142011-12-30T02:44:22.715+00:002011-12-30T02:44:22.715+00:00I'm curious about the shaft that actually driv...I'm curious about the shaft that actually drives the plastic into the hot end. What material is that? Metal? And what do you do to it so that it bites into the plastic and doesn't slip?James Newtonhttps://www.blogger.com/profile/12037091869641832295noreply@blogger.com