Talk:Tutorials/Mob farm

Spiders, they suck...


I built this Mob Farm accordingly to the tutorial, and it's pretty efficient ! There is still one problem though: Spiders! Since they can now climb wall, it's possible that they block the funnel ! Emptying 1 more ceiling block seems to correct this. --Yamitatsu 16:37, 17 January 2011 (UTC)


 * Thanks a lot for the feedback! I didn't really notice the lack of string production, and I certainly didn't connect spiders' new climbing ability to any issues with the farm. I added your image and solution to the main page. MrMatthew 19:16, 17 January 2011 (UTC)


 * You're welcome^^
 * Well, in fact, it didn't just stopped the string production, as you can see on the screenshot, many mobs were stuck behind the spider, so the whole process was stopped :/
 * I let it activated the whole afternoon with the small correction, and so far, no more interruption :) Filled a large chest with all the loots:) I'm thinking about making another 50x50 spawn room above the first one, this could maybe give a lil boost to the production^^


 * Anyway, thanks for the tutorial, well explained :) Though I had to make some schemes on OOo Calc to be sure not to do any mistake since English isn't my mother-tongue, lol^^
 * --Yamitatsu 00:39, 18 January 2011 (UTC)
 * I've heard that a block of cacti in the right place can stop spiders clogging the trap, and with the new dispensers needing bows to make, yes, we do need that much string. --Nahere 01:00, 18 January 2011 (UTC)
 * Even by updating the funnel to properly funnel and kill spiders, the fact is that many won't even end up in the kill area, since they can just climb their way out of the canals to begin with. If you're looking to kill spiders, this is probably not the best way to go about it, so a spider-specific farm might be in order. Hmm, new challenge for me! MrMatthew 18:49, 18 January 2011 (UTC)
 * Yeah, not that much spiders, the fact is they can jump easily above the 2 blocks canals, maybe with 4 blocks it would prevent them from stay safe outta water^^. Though, sometimes when i go check through the glass along the funnel, i see 4 or 5 spiders in it, i guess that's because i come closer and they try to get me^^.
 * --Yamitatsu 15:19, 20 January 2011 (UTC)
 * I was told that spiders cannot climb sandstone, so I'm planning to shut my farm down and put a line of sandstone around the inside of the canals. I'll let everyone know how that goes when I complete it. (EDIT: After checking the sandstone page, it does appear that spiders CAN climb sandstone. Hmm, back to the drawing board I guess...) MrMatthew 18:57, 20 January 2011 (UTC)
 * Well, it's kinda rare, but spider can still block the funnel, they seem to climb the wall on the side, i'll try to make it 4 blocks large and add a row of cacti on each side...
 * --Yamitatsu 09:52, 24 January 2011 (UTC)
 * I'm pretty sure they can't climb soul sand (the small amount of invisible gap makes them fall, I think) --Thevdude 15:52, 26 January 2011 (UTC)

Thanks for the tutorial! I built a farm based on this design. It did have a spider problem in the funnel which I have managed to fix. It seems like spiders are way less likely to be able to climb if you take out every other block. So from the base of the center hole to the first downward drop (where the red circle is on Yamitatsu's picture), I take out ever other block on top. That keeps them flowing faster. They still kept getting stuck at the red circle (I think because the drop point has two adjacent blocks) so I added a second fix: I added a third lava stream that comes into the tube from the side at the red circle. This means that if spiders are clinging to the dropoff, the lava gets them (this lava also gets some of the other mobs coming through). I still seem to be having trouble with spiders never making it down the funnel though. I think a fix for that might be to checkerboard the inside of the canal chutes above the water so that they have a harder time climbing out of the canals once they get in. I have noticed that they seem to occasionally stick at the very top of the chute (right where the four main water flows meet), so it might also be a good idea to make the hole drop a couple more squares, and then take out every other blocks within the chute so that they can't stick in it. (Mirth23 04:26, 28 January 2011 (UTC))
 * Interresting fixes:) I'm thinking about going to the Nether and collect some soul sand, since spiders can't climb it, and replace every sides block of the canals with it, to see^^ If it works i'll post some detailed schemes here^^
 * --Yamitatsu 07:53, 28 January 2011 (UTC)

I made this same mob farm on a server where I do not have difficulty control. The mobs aren't quite as abundant, but it still works great IMO. The issue is, I think, that spiders end up overspawning, and never getting into the trap. I was able to get around 54 sulphur in about an hour when moving around and such, but when I left myself at the collection point overnight, I ended up with hardly a stack more. I made a glass roof where I could go check on a section of my trap and there are tons of spiders. Even if I lure them over to the canals, they don't go in. I may try something with cacti or checkered walls. I also noticed that when the spiders got to the drop down just before the killing mechanism, that third block wasn't enough. I had to make it four before they stopped hanging onto it.

--Sevalecan 05:15, 29 January 2011 (UTC)
 * It will work and then, somehow, spiders will still block the canal at the 4th block, they do climb the side walls, so no matter how many additionnal block you dig, they will be annoying, i'm still collecting enough Soul Sand to make the canals' sides, since it prevent spiders from climbing.
 * --Yamitatsu 12:27, 29 January 2011 (UTC)

It's possible to put a cactus in the funnel to kill off the spiders. If built as described in the tutorial on the first drop, put a sand with 2 cacti on top. You'll have to punch a hole in the wall. This will mess up the water flow. To fix the water flow, at the beginning of the funnel, where the mobs drop in, you want only 1 water source on the same side as the cactus. This should give a diagonal flow to the water allowing all mobs to bypass the cactus and to prevent items from being stuck in front. The water flow doesn't quite reach the end of the funnel, so you have to place 2 more water sources. One goes next to the sand block after the drop and the other needs to be put into the wall in front of the sand. This will allow the water to flow properly into the lava. This has removed all spider issues as they immediately kill on the cactus.

On another note, you can tweak the funnel without switching to peaceful by blocking the hole in the ceiling and then making changes

--Venix1 19:59, 29 January 2011 (UTC)

Notification System
At the end, it might help to make some wooden pressure planks that lead up to the surface with redstone and light up a torch or make a sound with the note blocks so that you know you've got items awaiting you... Eldonman101
 * On mine, I do have a redstone wire and torch system that spirals around my mining shaft (I was actually thinking about doing a tutorial on it) that let's me know when there are items. However, the rate that this machine kicks out items, it's almost always going to be on. Once you assure the machine is working, the need for a redstone alert system is a little unnecessary, but I urge you to make this farm your own! MrMatthew 18:56, 20 January 2011 (UTC)
 * Yeah, I'd probably be a waste of time. Anyway, my work has begun! I've just been reading about it. It would be nice to have a door you can open/close at the end of the collection system with a lever so your items get in but no water can... It would make it so much simpler to make the collection system (the stream wouldn't have to be so long). -Eldonman101

Ladders vs Signs
Is there any benefit to using ladders vs signs for retaining the lava? I created a mob farm according to these plans and used signs... It seems to work fine. My reasoning was that the mobs might climb up the ladders a bit and then they would have a higher chance of their loot dropping into the lava when they died. Thoughts? --Samuraifalcon 20:45, 24 January 2011 (UTC)
 * I didn't think mobs could climb ladders. That would be the only difference, I just use ladders because I always have ladders on me when I'm mining. MrMatthew 17:10, 25 January 2011 (UTC)
 * I believe mobs have at least the mechanics to climb ladders, as recorded in the article on Ladders and the corresponding talk page.  Mobs may not have the A.I. to "climb" one or more ladders as a part of their pathfinding, but the mechanic of climbing exists for them if the mob moves next to the ladder, which would be likely here. Also, you make a valid point about already having ladders. Anyways, a minor difference but some may be interested :) --Samuraifalcon 19:45, 25 January 2011 (UTC)