2014-04-16 22.36.37

The rock melter is a useful way of obtaining lava without having to pump it from nether or deep in overworld. It takes power input from any engine attached, and converts it to heat that melts the rocks so separate heating is not required.

Rotarycraft Handbook DescriptionEdit

"The rock melter uses frictional heating to melt rock into lava, which can be drawn out with pipes. Netherrack provides the most lava per block while cobblestone provides the least.


Power Scalable
Torque Scalable
Max temperature 1,800 degrees
Power Input Bottom

Angular Transducer OutputEdit

  • Source of power input, total power and speed

Temperature Requirements Edit

The Rock Melter needs to meet a certain temperature to process materials. The required temperatures are material dependant, see the table in the Duration of Operation Formula section for target temperatures per material.

For every tier of power input, temperature increases by 64 degrees. See the table for temperature increases at various power inputs.

Power Temperature increase
2 W 64
4 W 128
8 W 192
16 W 256
32 W 320
64 W 384
128 W 448
256 W 512
512 W 576
1.024 KW 640
2.048 KW 704
4.096 KW 768
8.192 KW 832
16.384 KW 896
32.768 KW 960
65.536 KW 1024
131.072 KW 1088
262.144 KW 1152
524.288 KW 1216
1.049 MW 1280
2.097 MW 1344
4.194 MW 1408
8.389 MW 1472
16.777 MW 1536
33.554 MW 1600
67.109 MW 1664
134.218 MW 1728
268.435 MW 1792
536.871 MW 1856
1.074 GW 1920
2.147 GW 1984
4.295 GW 2048

Do note that the machine takes ambient temperature into account. Operating this in the nether will net you a 300 degree temperature bonus.

Final_Temperature = Ambient_temperature + log₂(Input_Power) * 64

Simply check the required temperature of the material you want to process against the table, apply the required power and it will process that material. Providing more power will increase the processing speed without any losses.

Duration of Operation FormulaEdit

The duration of operation depends heavily on the type of material/block you are trying to melt. Check the table for all the recipes melting energies.

Material Output Amount Temperature Energy
Stone Lava 1000 1000 5.200 MJ
Cobblestone Lava 500 1000 3.120 MJ / 2.82 MJ[1]
Netherrack Lava 2000 600 480.000 KJ
Stonebrick Lava 1000 1200 4.160 MJ
Glowstone dust Glowstone 250 400 80.000 KJ
Glowstone block Glowstone 1000 500 320.000 KJ
Redstone dust Redstone 100 600 120.000 KJ
Redstone block Redstone 900 750 1.080 MJ
Ender pearl Ender 250 400 240.000 KJ
Coal dust Coal 250 300 60.000 KJ
Ethanol crystal Ethanol 100 180 6.000 KJ
Pyrotheum (Thermal Expansion) Pyrotheum 100 1800 9.000 MJ
Cryotheum (Thermal Expansion) Cryotheum 100 -200 2.000 KJ
Crystal shard (ChromatiCraft?) Potion crystal 8000 500 80.000 KJ
Experience (MagicCrop) mobessence 200 600 360.000 KJ
  1. Certain types of cobblestone will use the cheaper recipe

After the machine has reached the target temperature, it's stored energy increases by the input power once per tick. Once the stored energy exceeds the required energy for the recipe, an item is processed.
If the temperature of the machine is LESS than the target temperature then the stored energy will be multiplied by 0.85, meaning that 15% of the stored energy will be lost for every tick that the machine is below the target temperature.
Do note that the required energy is 20 times higher than the above listed, this effectively means that the processing speed is in seconds rather than ticks.

The formula for operational speed therefore is...

Time_In_seconds = Recipe_Energy_Required / Power_Input

Taking stone as an example, which as per temperature requirements above, requires 65.536 KW of power to process will be processed once every 79.35 seconds.

Tips & TricksEdit

  • Other heat generating and/or cooling machines can be used to control the temperature of this machine. However, you don't gain anything other than potential operational speed by doing so. Materials still have a fixed energy requirement so you would be better off meeting the required power input level. But... In a pinch... You can.