My Replikeo Prusa i3 Rework Build
Posted by Trike
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 12:42AM |
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gadget_greg
Mike, I've been using the zip ties that came with the kit and some similarly-sized ones from WallyWorld, 100 for $1.29! YMMV.
Bratan, IDK about the MOSFET grounding out but that z-axis stabilizer is similar but Tech2C's is a perfect fit. I printed part of that other one and it didn't line up well for whatever reason. It was easier for me to just use Tech2C's...
I may shoot over to WallyWorld tomorrow - haha love that some people still call it that. Half the time when I say it, people are like, "Where is that?"
I think part of the problem is that they aren't consistent. Some of the ties are working just fine that came with it, while others won't grip their own teeth and immediately come undone. If I had 100, I'd just snip them off and try another one, but I'm not sure how many I need in total to go blowing through all the ones they gave me. Haha.
Pic is a perfect example. This was flush with the x-carriage and just slid right down the belt. I can't tighten it any further. Also, not sure why the bearings look like that in the pic. Must have been something with the flash.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 04:44AM |
Problem is not in zip ties, problem is how do you use them 
You are tightening them backward, teeth are supposed to be facing inward in "ziptie loop"
You are tightening them backward, teeth are supposed to be facing inward in "ziptie loop"
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 12:07PM |
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Allnei
Problem is not in zip ties, problem is how do you use them
The teeth are inward. If they weren't they wouldn't grip at all.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 12:12PM |
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LittleMike
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Allnei
Problem is not in zip ties, problem is how do you use them
The teeth are inward. If they weren't they wouldn't grip at all.
In your photo it does seem like you got the zipties wrong. One side of the head is flat and the other is protruding, make sure the protruding end points outward.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 12:14PM |
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alvinhochun
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LittleMike
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Allnei
Problem is not in zip ties, problem is how do you use them
The teeth are inward. If they weren't they wouldn't grip at all.
In your photo it does seem like you got the zipties wrong. One side of the head is flat and the other is protruding, make sure the protruding end points outward.
I think it's just the way it looks in the image. They're gripping, but on some, the teeth are "smoother" if that makes sense, so they slip.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 12:18PM |
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LittleMike
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alvinhochun
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LittleMike
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Allnei
Problem is not in zip ties, problem is how do you use them
The teeth are inward. If they weren't they wouldn't grip at all.
In your photo it does seem like you got the zipties wrong. One side of the head is flat and the other is protruding, make sure the protruding end points outward.
I think it's just the way it looks in the image. They're gripping, but on some, the teeth are "smoother" if that makes sense, so they slip.
Then you should switch to another one. There should be many more than you need, but even if you run out of zipties just buy more. They are dirt-cheap.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 12:21PM |
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alvinhochun
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LittleMike
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alvinhochun
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LittleMike
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Allnei
Problem is not in zip ties, problem is how do you use them
The teeth are inward. If they weren't they wouldn't grip at all.
In your photo it does seem like you got the zipties wrong. One side of the head is flat and the other is protruding, make sure the protruding end points outward.
I think it's just the way it looks in the image. They're gripping, but on some, the teeth are "smoother" if that makes sense, so they slip.
Then you should switch to another one. There should be many more than you need, but even if you run out of zipties just buy more. They are dirt-cheap.
That's why I said I was going to shoot over to the store and get more
I counted how many I need for the rest of the build, and I have a total of 2 extra. Looks like they didn't include that many in my package.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 03:00PM |
I am almost sure from photo, that zipties are backward
My X carriage
My X carriage
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 03:02PM |
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Allnei
I am almost sure from photo, that zipties are backward
My X carriage
You're missing one
Haha I double checked and you are right - some of them were backwards. Not sure how I managed that, but I fixed it. Still having the same issue with tension on some of them, but others are holding. I think it's just a matter of cheap ties. I'll go pick up a bunch so I don't have to worry about tossing some if they don't hold.
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Re: My Replikeo Prusa i3 Rework Build August 23, 2014 04:50PM |
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Allnei
Reason why I have only 3 screws in X carriage is because my extrudes body is little warped and can´t be secured it with 4th screw
Ah gotcha. I have to put this on hold for a couple of days, which makes me frustrated, but I have other things to do, unfortunately. I'll check back in later
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Re: My Replikeo Prusa i3 Rework Build August 24, 2014 11:33AM |
Well this sucks. I got new MOSFETs desoldered bad one, replace with new one, checked everything seemed to be ok,no shorts. Assembled it back and HotEnd would not heat up, LED would not light up. So I took board off, unplugged everything but thermistor sensors and heaters, tried it again, now HE mosfet is always on, Arduino has no control over it 
I guess I need to get a new RAMPs board
I guess I need to get a new RAMPs board
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Re: My Replikeo Prusa i3 Rework Build August 24, 2014 04:21PM |
Well I fixed it. Problem was that I must've damaged traces when I was removing bad MOSFET, they lifted up on both sides. I fixed it by soldering short wire from R13 to MOSFET's Gate pin (1). I kind of suspect this trace might have broken before when I was bending MOSFET to fit Heatsink on it. Anyway it's no good that copper traces coming off so easily...Quote
gadget_greg
I'm beginning to thing that the RAMPS platform is pretty fragile. My Heat Bed will no longer sustain a temp, even a low temp like 60. It heats to a point then just cuts out. I have a relay I can use and bought just for this purpose but it's triggered by 5v and the MOSFET is 12v so I need to do a little research how to hook it up... :/
Good luck with Relay, it might be the way to go, let me now if you figure it out!
I also connected extruder fan to D9, but now it's not running when I'm heating up extruder
Repteier disables it for 1st layer it thinks I have fan for cooling filament and I don't see option for Extruder cooling fan... I added custom G-code to keep fan on, hopefully it will stay on
Grerig, you mentioned you printed z-endstop holder. How did you glue it? It says Acetone for ABS, but I'm printing in PLA...
Edited 2 time(s). Last edit at 08/24/2014 04:41PM by Bratan.
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Re: My Replikeo Prusa i3 Rework Build August 24, 2014 09:52PM |
Thanks I'll give it a go with superglue!
Guys I has another issue with printer, which I kind of expected to happen since day 1. Those little m5 nuts that basically hold whole X assembly moving on the z axes along M5 threaded rods, are finally falling off. There's not much to hold them other than plastic fitting which get's loose with time. Is there a better design for this that anyone know of?
Guys I has another issue with printer, which I kind of expected to happen since day 1. Those little m5 nuts that basically hold whole X assembly moving on the z axes along M5 threaded rods, are finally falling off. There's not much to hold them other than plastic fitting which get's loose with time. Is there a better design for this that anyone know of?
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Re: My Replikeo Prusa i3 Rework Build August 24, 2014 11:16PM |
Yes I mean X-motor mount and idler. They are not upside down, but sometimes hotend pushes on the bed, and nuts coming off. This happened few times already so they are not holding strongly. I'll try superglue, but this is quite obviously a flaw in the design...
I've been thinking on improving it, but so far got nothing. Putting nuts inside in the slot would solve falling out issue, but it would be hard to prevent nut from rotating... Gotta think about it
Edited 1 time(s). Last edit at 08/24/2014 11:22PM by Bratan.
I've been thinking on improving it, but so far got nothing. Putting nuts inside in the slot would solve falling out issue, but it would be hard to prevent nut from rotating... Gotta think about it
Edited 1 time(s). Last edit at 08/24/2014 11:22PM by Bratan.
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