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Author Topic: Sloooow progress on the I3 clone  (Read 464 times)

KingBeetle

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Sloooow progress on the I3 clone
« on: June 03, 2018, 05:54:47 AM »
Parts from China are finally starting to trickle in, and I can at least feel like I am making some progress on the build.  I received the smooth rods and bearings on Friday, and was able to partially assemble the Y-axis.  Note that the wood frame is just attached to check clearances and to see what it would look like.  No attempt has been made to position the frame front-to-back with any kind of accuracy.

I'm happy with the smoothness of the rods and bearings.  Finally the printer has a moving part! 


KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #1 on: June 09, 2018, 01:53:11 AM »
Got some of my M3 hardware and was able to get a little bit of assembly done.  Still waiting on the steppers and the lead screws to arrive so I can get this show on the road and start to make some REAL progress.


jinx

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Re: Sloooow progress on the I3 clone
« Reply #2 on: June 09, 2018, 04:28:57 AM »
maybe slow, but there progress, took me 5 mths to get my first print! was joyat the end  ;D.
 you planning adding extra to the wooden frame, I see with some design they add triangle sides to the frame. wondering if you gonna add them, apart from making frame a little more sturdy gives you a place to mount the tronics and psu.

 
like those on the right
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KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #3 on: June 09, 2018, 02:21:57 PM »
Well, the frame is 25mm thick and plenty rigid, so I don't think any extra reinforcement will be needed.  My plan is to 3D print a shoe/sleeve that slips onto the end of the PSU that will provide a place for the IEC power socket/fuse/switch to mount and cover up the AC mains connections to the PSU.  I may try and mount the heatbed MOSFET module in there too, with a small fan.  That will keep the wires short from PSU to the high amperage side of the MOSFET module.  I can run light gauge wires to the bed heater connections on the mainboard since they won't be carrying any kind of load.

I figure I will mount it something like in the picture below, but lowered down so its base is on the same plane as the bottom of the frame to serve as a sort of stabilizing bracket for the frame.

I haven't decided how I am going to mount the electronics yet.


jinx

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Re: Sloooow progress on the I3 clone
« Reply #4 on: June 10, 2018, 04:19:00 AM »
"I may try and mount the heatbed MOSFET module in there too, with a small fan"
 honestly there no need for a fan on those little monsters, 10 hrs of printing with a heated bed  the heat sink dont get hot/warm, think you be adding unnecessary noise with a fan.
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KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #5 on: June 10, 2018, 12:52:07 PM »
The module I purchased is pictured below. The heat sink is 42mmx25mmx30mm.  I plan to purchase this 24V 200W silicone heater - https://www.aliexpress.com/item/24V-200W-200X200mm-Silicone-Heater-Bed-w-100k-thermistor-3M-Tape/32869694356.html

I just figured there was a reason for that massive (comparatively) heat sink, and it was gonna need additional cooling, especially if I mount it in a relatively small enclosure like in my proposed PSU boot.  You can't see it in the pictures, but the PCB even has a JST connector for a fan. 

So no need for an additional fan, eh?  That's why I joined this forum - to garner advice and improve my build.  Of course, the real beauty of building my own 3D printer is that if I do decide later it needs a fan, I can just 3D print a new PSU boot and add one. ;)



KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #6 on: June 11, 2018, 12:15:29 AM »
Feeling irritated - I just started printing the fourth print of upper and lower Z-axis mounts for the build.  (I'm glad filament is cheap!)

The first set was scaled too small due to ABS shrinkage I didn't consider.  So I took that into account and printed a second, scale corrected set. 

Then I discovered the X-axis rods I purchased are about 12mm too long, which made the Z-axis rods and lead screws 12mm too far apart.  I could still mount the rods to the frame, but I felt the screws would be too close to the edges of the frame and might split the wood.  So I modified the mounts, moving the mounting holes on all four mounts 6mm inwards, and printed a third set.

Now I have discovered that the heads on the screws I purchased are too large in diameter and don't drop down into the shouldered holes in the mounts (I had to use imperial #6 x 3/4 inch screws because metric hex cap head wood screws are not readily available in the US).
So I modified my modified offset mounts, enlarging the shouldered holes to fit my available screws, and I am printing them again, hopefully for the last time.

*sigh*

All I can really say is that I am glad it's all open source and I can just make new parts to accommodate my needs.  I knew going into this project that buying parts from China from umpteen different suppliers and making them all work together was going to be challenging, so I guess I just have to mark it up to experience and move ahead!

KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #7 on: June 12, 2018, 03:39:37 AM »
Got some more parts in and was able to get all the axes assembled and mounted to the frame!  It's finally starting to look like a 3D printer.

jinx

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Re: Sloooow progress on the I3 clone
« Reply #8 on: June 12, 2018, 05:24:47 AM »
looking good,
 another classic presumption of jinx! when talking heatbed modules I use ( and think all use this one  ::)
               

 compared to the gen l board in size, its a little monster. not read a whole lot on yours,  be good to get an update when you up and running. what you gonna use for a build surface, 5 mm aluminum machined surface finish.

Quote
especially if I mount it in a relatively small enclosure like in my proposed PSU boot
my gut feeling  is you dont, for the first 30 hrs of printing, see how it goes,  with one final thought on mounting where ever it goes, can you get to it in seconds and easily inspect the wiring occasionally!. 
        if you gona have a fire (bed wise) gonna be there or the junction of the heat mat.

 on tht note happy building... goes for coffeee
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KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #9 on: June 13, 2018, 12:37:14 AM »
Quote
..be good to get an update when you up and running.
Absolutely!    It probably won't be for a few weeks tho.  Hell, I haven't even ordered the bed heater or build surface yet. 


Quote
what you gonna use for a build surface, 5 mm aluminum machined surface finish.
I still haven't completely made up my mind regarding the build surface.  I actually was considering a 220x220x5mm 6061 aluminum plate, but I was doing some research into the mass, and a sheet that thick has a mass of around 650 grams.  Seems like a lot of inertia-creating mass to be jerking back and forth on the Y-axis.
Thinning the plate to 4mm drops the mass to around 525g, and 3mm has a mass of around 395g.  I'm not sure where the trade off is between losing heat retaining thickness and weight reducing thinness.
I do know that the 3mm build surface on my buddy's Makerbot R1 clone is terrible at retaining heat.  If I want to heat the bed above about 85C, I have to enclose all the sides and the top of the printer to keep it from radiating away all its heat.
I'm probably going to go with a 4mm think plate - Seems like the best balance between mass, rigidity, and heat retention, although damn, half a kilo of just print surface?


Quote
(bed MOSFET module) one final thought on mounting where ever it goes, can you get to it in seconds and easily inspect the wiring occasionally!
A valid concern I hadn't actually considered.  Perhaps a removable or hinged inspection panel might be a good  idea.

KingBeetle

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Re: Sloooow progress on the I3 clone
« Reply #10 on: June 21, 2018, 04:38:36 AM »
I made some more progress this week - I received the E3D V6 Clone and was able to put together and mount the extruder assembly:


 

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