Org Minecraft Server

[TinCow]

OK I found the spot in your mine, and whiled around close by for quite some time (~ 2 days) but nothing spawned.
Then I went to my old mine where I'd found this big slimeball once, but again nothing has spawned there since I laid down the torches.

Be aware that hanging out too close will also prevent them from spawning. Nothing will ever spawn within 24 blocks of you, so if you're standing right in or near the farm, nothing will ever show up. I tend to work on my farm and in my main workroom while I am waiting, as both are far enough away to allow spawns to occur. You may have also just gotten unlucky. Slime spawns are rare, and even with the farm they remain rare, just not quite as rare as before and far easier to locate.

[Vladimir]

Good info TC. That explains why slimes tended to spawn in the same area of my single player game.

Since you know the general area where they spawn you could lay down pressure plates and link them to a signal (redstone torch, piston alarm, etc) so you know when they're jumping around.

[rajpoot]

Be aware that hanging out too close will also prevent them from spawning. Nothing will ever spawn within 24 blocks of you, so if you're standing right in or near the farm, nothing will ever show up. I tend to work on my farm and in my main workroom while I am waiting, as both are far enough away to allow spawns to occur. You may have also just gotten unlucky. Slime spawns are rare, and even with the farm they remain rare, just not quite as rare as before and far easier to locate.

Success!!
I waited at some distance and then started mining to kill time. Third time I checked I heard the clicking of the slime. It was just one, but I got three slimeballs. More than enough for now. I now see why these things are worth their weight in, err...diamonds. Speaking of which I also hit a two block diamond vein while mining. I left the gems in your coal chest.