Cart Assembler

The Cart Assembler can attach a Contraption to carts that pass through it when supplied with a Redstone signal.

Obtaining

Breaking

Hardness	1.5
Tool
Breaking time
Default	7.5
Wooden	1.15
Stone	0.6
Iron	0.4
Diamond	0.3
Netherite	0.25
Golden	0.2

Crafting

Name	Ingredients	Crafting Recipe
Cart Assembler	Any Log + Andesite Alloy + Redstone Dust

Usage

Rail Type	When Activated	When Deactivated
Rail	Assembles Cart Contraptions	Disassembles Cart Contraptions
Powered Rail	Assembles and releases Cart Contraptions	Disassembles and stops Cart Contraptions
Detector Rail	Assembles unassembled Cart Contraptions, Disassembles Assembled Cart Contraptions	N/A
Activator Rail	Disassembles Cart Contraptions. Unlike the other rails, the Cart Assembler is not required for this to happen.	N/A

Configuration

Using a Wrench, the Cart Assembler can be configured to set the movement of cart contraptions to "Always face toward motion (default,)" "Pause actors while rotating," and "Lock Rotation." On the second setting, actors such as a Deployer will not work while the cart rotates. On the third setting, the contraption will not change alignment along with the cart, and will retain the same rotation from when it was built, much like the effect of a Mechanical Bearing on a cart contraption.

As of 0.3.2, Cart Contraptions with Spawners attached can no longer by picked up, instead displaying the message "a mystical force is binding this cart contraption to the world." This can be changed in the Config.

Cart contraptions will not travel through nether portals.

Cart Contraptions

Cart Contraptions can be taken into the inventory by right clicking them with a Wrench. Excluding entities, this keeps all storage and cart configuration.

Similarly to rotating structures, having a Mechanical Bearing in the structure will cause the attached part to keep the same alignment as the cart moves.

Cart Contraptions with a Furnace Minecart can automatically take Coal as fuel from onboard inventories.

Despite having collision with mobs or items, Cart Contraptions do not collide with blocks unless the appropriate world-interaction block makes the collision.

Carriage Contraptions

Carriage contraptions are moving structures connected directly to two minecarts.

Carriage Contraptions can be made by connecting two Cart Assemblers with minecarts using a structure. This will not work if the two minecarts are linked together by Minecart Coupling.

Carriage contraptions can also be disassembled by right clicking with a Wrench.

Aside from movement, there is no difference between the functions of a Carriage Contraption and a Single Cart Contraption. However, the smoother movement is better for moving mobs or items with only collision.

History

Version	Changes
0.2	Added the Cart Assembler. Fixed Minecart contraptions killing their own mount using Mechanical Saws/Drills. Fixed Cart Assemblers blocking in the powered rail kickstart logic.
0.2.3	Cart Assemblers can now be configured to 3 different rotation modes. Minecarts with mounted contraptions can now be picked up as an item. Furnace Minecarts can now be used in the Cart Assembler. Fixed displaced coordinates between contraptions and their mounts to fix minecart contraptions disappearing when loaded near chunk borders.
0.2.4	Changed the way Cart Assemblers react to redstone input. Fixed crash when assembled minecarts pick up the block below their assembler.
0.2.4b	Fixed server crash when Cart Assembler accelerates held Minecarts.
0.2.4d	Cart Assemblers now have several behaviours depending on the rail type they were placed on.
0.3	Contraptions can now be mounted between two Minecarts. Chest Minecarts can now be used in the Cart Assembler. Minecarts can no longer be moved while a contraption is stalling them. Moved option input of cart assemblers to side faces. Fixed activator rails not diassembling furnace minecart contraptions. Fixed drills continuing to dig at old locations when placing a minecart structure somewhere else. Cart contraptions now keep their item name.
0.3b	Cart Assemblers can now be placed on controller rails.
0.3c	Minecarts can now collide with non-mounted contraptions.
0.3.1	Fixed minecart contraptions started on a powered rail facing in unwanted directions. Fixed powered rail Cart Assemblers not respecting the solid block rule of powered rails. Fixed minecart contraption items not facing away from the player when placed. Fixed duplication of Cart Assemblers.
0.3.1c	Minecart Contraptions with exceeding NBT packet sizes can no longer be picked up.
0.3.2	Cart Assemblers now have a specific direction. Assembled cart contraptions assemble and disassemble according to the assembler's direction. Cart contraptions no longer turn exponentially. Cart contraption now turn more sluggishly the larger they are. Some changes to the Cart Assembler model. Fixed wrenching of cart contraptions being able to duplicate items. Cart contraptions with attached Spawners can no longer be picked up with a Wrench (Configurable). Fixed Mechanical Crafters duplicating and dropping their items when added to minecart contraption. Fixed Wand Of Symmetry duplicating rails under placed Cart Assemblers. Fixed Deployers not able to place down Cart Assemblers. Add proper rotation and mirroring to CartAssemblerBlock.
0.5	Recipe changed.