Comparators send their signal too slowly when activated. This causes a problem with unloaders because the powered rail doesn't deactivate in time to stop the minecart chest over the hopper. Usually the minecart bounces off the block and returns back along the track. The hopper is only has time to disgorge one item from the cart per run.
I've tried a couple of designs and both have the same issue.
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Confirmed in 0.14.0 alpha / iOS.
Summary: Comparator delays 2 ticks instead of 1 while measuring a container
In my screenshot below, the right side of two hoppers facing each other has 1 item. When the button is pushed, it should take 2 ticks for the comparator to change its state (1 tick for the torch, and 1 for the comp itself). But actually it takes 3 ticks as shown.
[media]Confirmed in 0.14.0 alpha / iOS.
Summary: Comparator delays 2 ticks instead of 1 while measuring a container
In my screenshot below, the right side of two hoppers facing each other has 1 item. When the button is pushed, it should take 2 ticks for the comparator to change its state (1 tick for the torch, and 1 for the comp itself). But actually it takes 3 ticks as shown.
[media]But @unknown, I think your unloader is not very reliable because even without the bug it would take 3 redstone ticks (6 game ticks) for the powered rail to deactivate after the minecart hits the block. I assume 6 game ticks is long enough for the minecart to bounce off.
But @unknown, I think your unloader is not very reliable because even without the bug it would take 3 redstone ticks (6 game ticks) for the powered rail to deactivate after the minecart hits the block. I assume 6 game ticks is long enough for the minecart to bounce off.
This may just be a duplicate of MCPE-15793... it's hard to tell. When 15793 is fixed, we'll know for sure.
Devs reported back that this works as intended.
Explanation:
1 tick for updating the torch.
1 tick for updating the hoppers. (arguably this could take a tick longer)
1 tick for updating the comparator.
Quick list of the possible problems.
Power rails are reativating too quickly.
Items being taken from a minecart/hopper to another hopper are leaving the second hopper too quickly.
These two designs no longer work in xb360.
The mine cart drops one item and is sent back down the rail.
Quick list of the possible problems.
Power rails are reativating too quickly.
Items being taken from a minecart/hopper to another hopper are leaving the second hopper too quickly.
These two designs no longer work in xb360.
The mine cart drops one item and is sent back down the rail.