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Mass Fabricator

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The Mass Fabricator is a considerably high cost, advanced machine that requires 1,000,000 EU to generate UU-Matter. This material in return is capable of creating many different items, including some that are otherwise unattainable (e.g. Iridium Ore, and water source blocks). Using a Mass Fabricator to generate UU-Matter will drain power very fast. It is a good tip to have at least 1-2 HV Solar Arrays or machines similar to that amount of energy generation.

Currently, this, the Oil Fabricator, and the Terraformer are the only machines that are capable of accepting High Voltage from an HV Transformer or MFS Unit directly. If your Mass Fabricator is far away from your power source, this would be ideal. However, keep in mind that inadvertently using the Extreme Voltage side of the HV Transformer "will cause an explosion of considerable force, similar to a nuke."

Sending a redstone signal (excluding wireless redstone) to the Mass Fabricator will stop it from consuming power. For example a lever on it will work to stop it. Using the wrench won't always give you back the Mass Fabricator, sometimes it gives you back an advanced machine block, An Electric Wrench on LOSSLESS mode (Press M and tap your right mouse button to change modes - key bindings may vary) is required for a 100% chance of retrieving the machine.

If you use the Omni Wrench on Minecraft Forge:, FML Version: and MCP Version: 7.26a you will have a 100% chance of retrieving the Mass Fabricator.


If you're using an Electric Wrench, do not hold the targeting reticule over a machine when changing modes.

This will use your Wrench in whatever mode is currently selected. (Meaning you won't have a 100% chance to retrieve your machine.)

Alternate Configuration - Direct link to HV Solar Arrays

While connecting a Mass Fabricator up to a Scrap/Recycling system and redundant MFSU set-up will allow your Mass Fabricator to run smoothly, efficiently, and at night, (the only reason to run at night is if your scrap system doesn't have enough of a buffer) it is also entirely possible to hook the Mass Fabricator directly up to your HV Solar array. This can make placement and use significantly easier as you only need to connect one HV-capable piece of wiring into the Mass Fabricator. As long as your HV Solar Array set-up is large enough, it will supply plenty of power to the Mass Fabricator much faster than directly hooking it up to an MFSU which can only output one 512EU/T stream.

A Mass Fabricator hooked up to an array of about 14 HV Solar Panels was consistently producing 1 UU matter in less than 10 seconds with no scrap to help speed things up; which equates to a full stack of UU matter in less than 10 minutes. This is certainly not the fastest setup, but it requires only one machine, the Mass Fabricator, without any manual intervention or complex Scrap-feed systems and will net you enough UU matter to make a full set of Quantum Armor in a few minutes. This assumes however that you already have HV solar arrays.


Crafting GUI.png

Glowstone Dust

Advanced Machine Block

Glowstone Dust

Advanced Circuit

Lapotron Crystal

Advanced Circuit

Glowstone Dust

Advanced Machine Block

Glowstone Dust

Mass Fabricator

  Raw Materials Needed  
8 Grid Glowstone Dust Glowstone Dust
24 Grid Redstone Dust Redstone Dust
10 Grid Lapis Lazuli Lapis Lazuli
24 Grid Rubber Rubber
12 Grid Copper Copper
26 Grid Refined Iron Refined Iron
1 Grid Diamond Diamond
6 Grid Bronze Bronze
6 Grid Tin Tin
32 Grid Coal Coal


The Mass Fabricator is used by first inputting any rate of EU (LV - HV only) to the machine, you can also place Scrap on the bottom slot of the GUI.

Scrap will increase the speed and reduce the cost of the fabricator by 6 times. Scrap is consumed in the process, a total of 34 scrap is needed to create one matter at maximum efficiency. To produce enough scrap to run the fabricator constantly, you need one Scrap for every 17.86 EU/t input (approximately). It's worth noting that scrap does NOT decrease power consumption; instead it will make more UU-matter for the same amount of energy. Scrap Boxes will amplify even more(Scrap Box amplification scales 1:1 with Scrap resulting in ~.03 UU-matter/Scrap which is the same ratio obtained when using normal scrap. ∴ Scrap Boxes are better to use for obtaining UU-matter if manually loading the Mass Fabricator, or if you need to use more than 1 scrap per tick). If pumping Scrap/Scrap Box from a Recycler to the Mass Fabricator, the pipes must connect to the bottom of the Mass Fabricator. If you wish to produce a lot of UU matter quickly, it would be best if you set up a Scrap Factory to make the Mass Fabricator run quickly.

Some manual testing has shown that 32 Recyclers (with no overclocking) running constantly can produce about enough scrap to run a Mass Fabricator consuming 512 EU/t consistently. However, due to to the random nature of scrap generation from Recyclers, it is an inexact measurement.

Early Start

It is possible to get started with a fabricator very early, as it doesn't necessarily require a lot of power. If you start one early though, it is suggested that its power supply is kept separate from that of other machines, as it will use all power available. It is also a good idea to have an igneous extruder supplied recycler and autocrafting table feeding it scrapboxes, as 1000000 EU is difficult to generate early game. The recycler can be powered with a solar panel or two and a bat-box if kept seperate from your fabricator.  The attached scrap system produces extra scrapboxes as well, from one recycler with no overclocking. With a few overclockers and a few more extruders, it would be possible to use extra scrapboxes to power a generator for the fabricator. A scrapbox supplied fabricator running off a charcoal-powered generator and one solar panel produces one UU-matter every 15 minutes. While this will not give you a quantum suit in a reasonable amount of time, the UU-matter can instead be used in the manufacturing of more generators/solar panels for a better power system for the fabricator.


Input 1,000,000 (166,666 with scrap)
Output -
Storage 1,000,000 (166,666 with scrap)

Maximum Input: HV (512 EU packets). Note that this is only a packet size limit - you can have an unlimited number of cables feeding the machine, and an unlimited amount of packets going through one cable, so long as no packet is greater than 512 EU.

Note: a single Mass Fabricator cannot receive more than 500,000 EU/tick, unless you go most of the way to 1,000,000 EU/tick (1 uu per tick).  When you get down to a few ticks per uu you should aim for a enough power to make one in a whole number of ticks, i.e. not 2.5 ticks.   If you try for 2.5 ticks it takes 3 ticks.

Video Tutorials

How to Tekkit - Mass Fabricator and Recycler07:32

How to Tekkit - Mass Fabricator and Recycler

Minecraft Technic Part 16 MFSU and the Mass Fabricator!08:04

Minecraft Technic Part 16 MFSU and the Mass Fabricator!



UU Matter Tutorial Tekkit06:28

UU Matter Tutorial Tekkit

Tekkit Lite Tutorial - UU Matter & Mass fabricators Part 114:09

Tekkit Lite Tutorial - UU Matter & Mass fabricators Part 1

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