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Lets build an Ultimaker 2+ Extended clone – Part 2 – Using Aliexpress

Welcome to Part 2 of the blog-post series with the never ending name of Lets build an Ultimaker 2+ Extended clone 🙂

This Part 2 is going to be about how to use Aliexpress, and what to keep an eye on.

  1. Ammendment – Ultimaker 2 assembly manua
  2. Lets get down to it – Picking suppliers
    1. Don’t just pick the first the best
      1. Sold By and Visit Store
      2. Product Name and Descriptionv
      3. Shipping and Shipping Price
      4. Total Price
      5. Positive Feedback
  3. Known good suppliers
  4. Common telltale to keep away

First a bit of an ammendment

I forgot to talk about the existing Ultimaker 2 Assembly manual, which is located on the official Github repository.

You might, rightly so, wonder why on earth I’m creating this blog-post series when a manual allready exists?

Well, that is a good question, and the reason why I havn’t got around to writing sooner. Not because of the question, but because of the existence of this manual, but the thing is: Just because you get an assembly manual, doesn’t mean all the small things are taken into account, nor, and especially, are there any things related to how to actually obtain the various parts.

This is the true heart of what I’m trying to do here: Descriping how and what parts you need to get, and what prices you can expect, along with advice on how to do this, or more particularily, what to avoid when shopping on Aliexpress along with some tricks on purchacing bundles.

Lets get down to it – Picking suppliers

I’m almost exclusively buying parts on – if you are new to it, you need to create an account and associate a credit card or paypal account. I’ve never had any issues regarding money been withdrawn when I hadn’t bought something. I’ve also always get my money refunded when relevant.

So, why make a section on picking suppliers, when it’s so easy?

Not all suppliers are created equal, and nor are their products.

When searching for items, you can sort by price, then do spend some time looking at the various items. You can also put a tick in free shipping, but that is not always favorable, so experiment some on this.

Don’t just pick the first the best

Do not just pick the first cheapest item that shows up in your search and buy it without doing a bit of investigation into the reseller.

Lets go through what to look for, using the seller from which I bought the frame and many of the parts as an example:

SANJIUPrinter 3D Research Center Store

Sold by and Visit Store

After a while you’ll get to recognize several resellers name listed under Sold by (Number 1), which is good, but untill then, you should use the Visit Store (Number 2) and browse through it.

If they sell all kinds of (junk) non 3D and CNC parts like fishing equipment, parts for various craft hobbies etc, you most likely don’t want to buy your stuff from that one – why? Because they likely just got a big batch of the items you look at, at a very low price, and just pass them on without any Quality Control. You might get lucky of course, and I’ve bought some minor items from such.

Product Name and Description

Product name and Decription (Number 3 and 4) are extremely important here. Yea sure! you might say, of course the name and description are important, but it is much more than as such. A good deal of suppliers use stock photos, so while it might show 2 pieces of something the name might say 1, or even worse, the name actually does say 2 pieces while the description states that you are only going to recieve 1 item.

This means you always must go through name and description for such discrepancies and take proper care. If in any way in doubt you should either pick a new store or Contact Seller (Number 5) and ask to make sure.

Also the seller might have special discounts listed in the Description. Our example seller here gives you discount if you add the item to a Wish list and add the shop to your Favorite Shop.

Note: in order to take advantage of rebates, you still need to add to basket, then click Buy (do not use one-click buying option), but choose a different payment method from normal, but not another card. This way the order is going to be placed, but awaiting payment. The seller can now go in and modify the price before you pay.

Simple, ehh? Not really, but it does work.

Shipping and Shipping price

Pay attention to the Shipping price and method (Number 6). This seller has free shipping using DHL on the frame, which is worth a lot. Also means it might just pay off to pick several other items from this shop, as you are guaranteed to get the items quickly, instead of waiting a month, and without most of the potential problems that might occur with missing packages slow toll/vat and such.

Total Price

The Total Price (Number 7) is the price of the item + shipping. It’s rather obvious, but I’m mentioning this, as the shipping price might be rather significant on smaller items, so stacking on a large free shipping items often pays off.

Positive Feedback

Feedback is everything on Aliexpress and the sellers are going very far to get a positive rating. It means you should contact them if you have any problems with the product, which often leads to some sort of partial refund.

After recieving your product you firstly need to confirm you have recieved it. You should give feedback, as it also rates the other way. The sellers are rating you as well, so keep that in mind! If you have problems, contact the seller and if you can’t find a solution you can Open a Dispute and 3rd party from Aliexpress judges the case.

Be resonable: you can’t get full refund for a functioning but slightly damaged product, like scratches etc.

Known good suppliers

As mentioned earlier, you are going to learn to recognize certain resellers. Don’t be afraid to shop from many different sellers, but I’ll put up a short list of shops I dare recommend. Also for more expensive parts.

Listed in no particular order

Common telltales to keep away

When searcing for a product you know is manufactured by a certain manufacturer, like the MKS-Makerbase controllers I’ve written about on instructables, you really should never buy such things from 3rd party stores. It does require you keep your eyes open, as multiple shops, also some of the Known good suppliers above, are selling copies of these things, but they can never give the same service and it’s often bad quality or a completely diffferent product alltogether.

Why have them on the Known good suppliers if they act like this? There are bad, and there are bad. Allways keep your eyes open 🙂

Another thing you really must keep your eyes on, is when you are looking for the Ultimaker 2 frame. It should be created from Dibond plates (sandwich of aluminium on either side and hard plastic as core) and acrylic plates for the sides, but you are going to see a lot of wooden and even all acrylic frames. Don’t go there! Some are assembled, meaning screws and nuts are included, while others are not, so take that into consideration.

Some shops include parts, you might see as 100% part of the object, but which is viewed as an extra by the resellers. Like the piece of Dibond for the Ultimaker 2 bed, hiding the bearings and lead screw nut. These things are worth money, and looks matters as well.

17 thoughts on “Lets build an Ultimaker 2+ Extended clone – Part 2 – Using Aliexpress

  1. Have my first order off to Aliexpress, great write up and following!

    1. Thank you for your feedback and nice to see it is usefull 🙂

  2. Hi, Great info here. I Just received my UM2 extended frame from Jennyprinter. It is very well made of dibond and fit together flawlessly. Now to start ordering my other parts. Extruder is my big question. 3mm or 1.75mm and dual extruder would be nice.

    1. Hello Daveland. Thank you for your feedback! JennyPrinter is making nice products for sure. Got my first open frame from them as well 🙂 Standard Ultimaker is using the 2.85mm filament, but you can get 1,75mm olsson’s block as well, or use E3D 1,75mm.
      I havn’t published the post yet, but working on a post regarding these very things.. I just had to wait for a working sample of the Olsson’s block, as the first one was for the bin.
      Regardless of filament size I recommend buyin the Titan Extruder from Trianglelab on Aliexpress. Just remember to note filamentsize.

      I’m usin 2.85mm on my ultimaker clones. Mainly to make them 100% true to the clone, but I am using 1,75mm filament on my primary printer. In theory the thinner filament can printer faster, as there is a shorter path to the center of it, but in reality I do not think you’ll note any differences… I’ve been very pleasantly surprised with the 2,85mm filament and am not going to change it.

      If you plan on doing any sort of flexible materials, you want to go 2,85 as 1,75 simply isn’t suitable for it. Using 2,85 you can print Semi-Flex from NinjaTek and similar products from other manufactures – I’ve been doing this over a year, and works nice in bowden as well 🙂

      1. I was leaning toward 2.85mm filament.

        Are the belts pulleys and sliding block assemblies the same for the UM2 and Um2 extended? I want to know if I must be careful when ordering if there are differences.

        Also what are reasonable steppers for the x/y axis. Since the stepper drives are running 24V I think that higher voltage/resistance motors should be used ( i remember this from a very old reprap thread in 2009)


        1. Only difference between Extended and normal is the height of the machine. Meaning frame height, lead-screw on z-motor and the 2x 12mm Z-rods.

          I’ve linked to some nice motors in one of the next parts of this series.

          You always want low resistance motors if you can get it.
          Higher voltage on psu means the motors reach effective “peak/torque” faster than when using lower voltage psu. Getting higher resistance motors just looses this advantage for you.

          You do not want high amps either, or your drivers can’t take advantage of them, so:
          Motors: max 2 amp.
          Inductance: preferebly lower than 3. Top max 4 or you get a slow pole machine.
          Torque at around/better than 4kg/cm

        2. A bit of an extra info on motors. There are lots of rumors and myths about motors and specs floating around.
          Not better when certain companies are selling “very powerfull 3Amp motors”.. as if the Amperage determines how powerfull they are.

          It’s perfectly possible to get weak motors with high amps.

          Even if the motors ARE powerfull the 3amp is going to mean, that you can’t ever run them at full potential, as all but the bleading edge drivers (on Duet – TMC2660) are capped at around 2amp before overheating – even using heatsinks and active cooling.

      2. Hi,

        which set do you prefer, because there are a lot combinations?

        1. Not sure what you mean?

          1. Hi Morten, I wanted to know which set for the Titan Extruder from Trianglelab on Aliexpress you prefer?
            Only the extruder or in combination with the stepper?


  3. Hi Morten, I received most of my order from Sanjiu including the frame/enclosure. Very nice. Did yours come with the nuts and metric screws to assemble? Just checking if I should send them a msg to send them? If not, do you perhaps have the sizes need to the enclosure? ie.. M3 x12 , M3x20… I notice from the step file the screws are buttonhead but must have overlooked the callout for the screws in the BOM.

    1. (Edit) I did find the screw and nut info in the PDF file.

    2. Yes, mine came with the screws and nuts. Most are 16mm

  4. Installed the linear rails, not very straight (Sanjiu). McMaster -Carr for $65, hope they are good.

    1. Do you mean linear rods? I did warn agains buying rods in China.
      I’m recommending for EU people. I have no idea about US people in this regard.

      1. Yes, I saw your warning, took my chances. Now have ordered linear rods from McMaster-Carr here in US. Also waiting on thermsistor for E3Dv6 from Filistruder before I can proceed farther. All parts from Sanjiu other than rods are very good. (On my browser the “Post Comment button” almost totally covers the recaptcha box)

        1. It’s meant to do the Recaptcha box before you write 🙂
          I can’t change these things, as it’s a Google security feature.

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