Issues found building printer... January 05, 2014 04:13AM |
Registered: 10 years ago Posts: 119 |
Re: Issues found building printer... January 05, 2014 04:25AM |
Registered: 10 years ago Posts: 256 |
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TMD_RS436
[...]
[*]The M5 threaded z-rod needs to have some sort of bracket fitted at the top of it, for health & safety and also if you knock it (even softly) it breaks the tab on the x-rib (around the M5 nut), had to super glue that back together, I may have to print a block with a slot in it to stop it breaking in the future.
l
Re: Issues found building printer... January 05, 2014 04:55AM |
Registered: 10 years ago Posts: 1,230 |
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TMD_RS436
[*]The thick white power cable with the 4 crimps on them will not fit through the Duet-enclosure, I had to file the slot wider to allow for the two wires to fit.
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[*]The Duet-enclosure could of been a few more mm larger in depth due to the Duet-enclosure-lid is catching on the Ethernet socket, resulting in not locking to the enclosure that side.
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I had no IDC tool, nor a vice so I had to pinch a silicon glue gun and attach 2 blocks of wood and press fit the IDC connectors to the ribbon cable, was looked at rather strangely, but it worked rather well
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Just need to I quote "Watch for smoke in case something has gone horribly wrong!" cracks me up every time I read that.
Re: Issues found building printer... January 05, 2014 05:01AM |
Registered: 10 years ago Posts: 119 |
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kwikius
Good catch. I thought this. That threaded rod could easily poke your eye out. You could put a ping pong ball on it for now.
Ideally the end of the rod should be turned down and have a bearing fitted with some sort of bracket off the z- axis. Which would also stop it wibblin'
regards
Andy
Re: Issues found building printer... January 05, 2014 05:03AM |
Registered: 10 years ago Posts: 2,472 |
Re: Issues found building printer... January 05, 2014 05:16AM |
Registered: 10 years ago Posts: 119 |
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ormerod168
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TMD_RS436
[*]The thick white power cable with the 4 crimps on them will not fit through the Duet-enclosure, I had to file the slot wider to allow for the two wires to fit.
Agreed, I split the cable in two and removed the isolation on the crimps and this sure was no overstatement "You need a good, square, crimping tool, or the crimps won’t fit well in the terminals"
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ormerod168
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TMD_RS436
[*]The Duet-enclosure could of been a few more mm larger in depth due to the Duet-enclosure-lid is catching on the Ethernet socket, resulting in not locking to the enclosure that side.
true that
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ormerod168
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TMD_RS436
I had no IDC tool, nor a vice so I had to pinch a silicon glue gun and attach 2 blocks of wood and press fit the IDC connectors to the ribbon cable, was looked at rather strangely, but it worked rather well
Brilliant idea! - could also be used as a wood splitter for very small stoves!
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ormerod168
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TMD_RS436
Just need to I quote "Watch for smoke in case something has gone horribly wrong!" cracks me up every time I read that.
Thank you for sharing and good luck he he...
Erik
Re: Issues found building printer... January 05, 2014 06:49AM |
Registered: 10 years ago Posts: 176 |
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TMD_RS436
I am already behind schedule of creating our prototype enclosure by about 3 weeks due to RS messing up my order, however I have it all built now so all is not bad now.
Re: Issues found building printer... January 05, 2014 06:50AM |
Registered: 10 years ago Posts: 314 |
Yes, I put a ball of white insulation tape (better than nothing) on the top with a bit sticking out as a rotation flag.Quote
TMD_RS436
[*]The M5 threaded z-rod needs to have some sort of bracket fitted at the top of it, for health & safety and also if you knock it (even softly) it breaks the tab on the x-rib (around the M5 nut), had to super glue that back together, I may have to print a block with a slot in it to stop it breaking in the future.
Paul
Re: Issues found building printer... January 05, 2014 07:04AM |
Registered: 10 years ago Posts: 314 |
I think RS and RepRapPro were hit by the success of the uptake of the Ormerod. Having been caught out previously with the Raspberry Pi launch delivery issues and having to wait months (just for a PCB!), I acted fast and ordered within hours from RS of the Ormerod launch and got #007 (next day I think!). A friend who ordered shortly afterwards was out of luck and was told the 500 hundred flew off the shelves. After that I guess it was a production/delivery rate issue, but I'm still not clear why some people had to re-order and why it was not simply a part number change?Quote
tru168
...... I ordered early Dec, and RS messed up my order and cancelled , re-ordered, messed up again , and still waiting for my third order and been informed by RS that Ormerod will be deliver by end of this month ...
Ew
Re: Issues found building printer... January 05, 2014 07:07AM |
Registered: 10 years ago Posts: 176 |
Re: Issues found building printer... January 05, 2014 07:18AM |
Registered: 10 years ago Posts: 119 |
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tru168
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TMD_RS436
I am already behind schedule of creating our prototype enclosure by about 3 weeks due to RS messing up my order, however I have it all built now so all is not bad now.
Looks like I'm not alone ! I ordered early Dec, and RS messed up my order and cancelled , re-ordered, messed up again , and still waiting for my third order and been informed by RS that Ormerod will be deliver by end of this month ,( although their web page stated will be available by 6th Jan ) now nearly 2 months still waiting . I'm thinking of cancel the order and just build Prusa I3 instead, which cost me USD559 included shipping. If RepRap pro packed with all items that mentioned in this forum ( printed fan cover, 10mm bearing, upgraded power supply etc.) I will just wait until end of this month.
Ew
Re: Issues found building printer... January 05, 2014 07:20AM |
Registered: 10 years ago Posts: 176 |
Re: Issues found building printer... January 05, 2014 07:26AM |
Registered: 10 years ago Posts: 176 |
Re: Issues found building printer... January 05, 2014 07:32AM |
Registered: 10 years ago Posts: 119 |
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tru168
Hi Treth ,
Yes , I'm one of those lucky guy who successfully purchased one of the Raspberry Pi from their very first batch.
I've been told by local RS help line ,that RS web system actually not linked worldwide in real time. My first order delayed for few days before it upload to UK branch and its all gone. order cancelled automatically. RS informed that second order will deliver by 23th of Dec, but then few days later , ( system delayed again ) The limited version all sold out and ask me yo cancel order again. third order placed with different parts number for the green one. Now still waiting for 3rd order. Ok Treth , I'll take your advice, I just wait for the green Ormerod to arrive and see how it goes. Thanks .
EW
Re: Issues found building printer... January 05, 2014 07:38AM |
Registered: 10 years ago Posts: 119 |
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tru168
Hi TMD_RS436 ,
Looks like its the same RS issue as you. I spent more than 2 hours total call time with RS help line too. Strange that, their order can't be cancel and just leave it like that.
Re: Issues found building printer... January 05, 2014 08:30AM |
Registered: 13 years ago Posts: 1,611 |
Re: Issues found building printer... January 05, 2014 08:48AM |
Registered: 13 years ago Posts: 1,611 |
Re: Issues found building printer... January 05, 2014 09:18AM |
Registered: 10 years ago Posts: 119 |
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droftarts
Hi Paul/TMD_RS436
Thanks for your feedback. Glad you grew to enjoy the process of building, however maddening! We still firmly believe that building a 3D printer gives you a much deeper insight into how the machine works, and encourages more experimentation. However, it's not for everyone - there are, of course, other, more commercial options available. I can't really comment on the RS ordering problems, or how they advertise it; perhaps if you could send them an email?
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droftarts
To answer your points:
x-rib - If you need a replacement, email me on support at reprappro dot com, with you name, address and machine number (we don't have access to the RS customer database). When you get to printing, print out the current z-nut-trap, which includes the nut trap in the printed part. You can cut the nut trap off the x-rib.
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droftarts
Sorry about the Z motor loom and Duet soldering problems. We're trying to improve the reliability of our suppliers.
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droftarts
We try to be clear in the instructions about how to wire the hot end; I'll review it to see if it can be clearer. Yes, the crimps are difficult to remove - you really need a thin shim you can slide up the side of the crimp, from the open end. It's important to get the crimp solidly in the housing; there will be poor or no connection if the pin is pushed back out when you connect the loom. Putting the crimp on the hot end heater wire can be difficult to do; the wire is right on the limit of the size that fits in the crimp. You should/may have some spare crimps left over from the bed thermistor.
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droftarts
The bearing on the back of the x-carriage should be kept in contact with the back of the x-axis-plate by the weight of the hot end; the bearing should be the only point of contact. The 9mm bearing should work, but we're looking at whether a 10mm bearing works better on balance.
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droftarts
Duet enclosure - we've done a number of mods to this. Usually squashing the clips on the top of ethernet socket helps, and the instructions show the proximity sensor connector with the pin bent down.
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droftarts
I assembled another heated bed on Friday, and noticed that the cardboard was the wrong way around - I'm not sure if the lasercut has changed. I flipped it over too, so the thermistor wire comes out on the Y motor side of the y-rib. I'll retake the pictures, when I get a chance.
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droftarts
"Watch for smoke in case something has gone horribly wrong!" - I wrote that! And it's a valid test...
Ian
RepRapPro tech support
Re: Issues found building printer... January 05, 2014 09:28AM |
Registered: 10 years ago Posts: 119 |
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droftarts
A note about the Z axis leadscrew: do not constrain the top. This has long been a problem in the reprap world, due to the use of cheap, but not necessarily straight, studding rather than expensive machined leadscrew. We designed the Ormerod to overcome many of the frame problems that the Mendel has. One of the biggest problems people have in reprap world is Z-banding (a wave in the vertical wall of printed parts that is the same pitch as the leadscrew), where the effect of a non-central leadscrew-to-motor shaft coupler, or a constrained non-linear leadscrew, pushes the X axis around (as it sits on the Z axis).
We designed the Z-leadscrew to rotate on a bearing at the bottom, to take away the effect of the motor coupler. There is no constraint at the top, so any bend in the studding does not try to force sideways movement in the X axis. Because the X axis is better constrained than a Mendel, the chances are it will actually stall the motor, rather than push the X axis around.
I hope that makes some of our design choices clear. Though something on the top of the leadscrew would help regarding health and safety, though!
Ian
RepRapPro tech support
Re: Issues found building printer... January 05, 2014 09:51AM |
Registered: 13 years ago Posts: 1,611 |
Re: Issues found building printer... January 05, 2014 10:09AM |
Registered: 10 years ago Posts: 119 |
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droftarts
Paul
Not quite... If the z-leadscrew is not quite straight, and is attached so it can't move at the bottom AND top, it wants to move horizontally in the middle as it turns. Sort of like a skipping rope, attached vertically. But it is constrained from moving there by the z-nut-trap. So it will either try to escape the nut trap (pushing the X axis around), or stall the motor (if the motor doesn't have enough power). So there shouldn't be any constraint at the top at all, leaving it connected at the bottom and the z-nut-trap, so the rod is always in line at these two points. This does mean the rod can wobble around at the top, though. You can try straightening the rod if it annoys you! Roll it on a flat surface, and gently bend it straighter.
Ian
RepRapPro tech support
Re: Issues found building printer... January 05, 2014 10:48AM |
Registered: 10 years ago Posts: 59 |
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TMD_RS436
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droftarts
Duet enclosure - we've done a number of mods to this. Usually squashing the clips on the top of ethernet socket helps, and the instructions show the proximity sensor connector with the pin bent down.
Yeah, I did try pushing the Ethernet shielding tabs flush, but its still not enough.
Paul
Re: Issues found building printer... January 05, 2014 12:20PM |
Registered: 10 years ago Posts: 14,672 |
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tim_h
I found I was able to snap off the clips quite cleanly. Just bend them in and out a few times and they will break at the corner.
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The thick white power cable with the 4 crimps on them will not fit through the Duet-enclosure, I had to file the slot wider to allow for the two wires to fit.