preventing specific item auto dropped from space platform

[oyssoyss]

I need to unload so can't uncheck the unload option.

there is another platform constantly supply my base with calcite made from asteroid.

you know, after upgrade all ships need calcite to make fuel.
and when they came to supply this planet. suddenly all their calcite on board are gone which is annoying.

I know I can required a amount of calcite to prevent it from dropping.
but this will sometimes cost me a unnecessary rocket launch from base and the base lost one shot of calcite.

so only way left is to store all calcite on belts?

[PunCrathod]

Make a new request group and request 0 calcite from the planet you don't want to drop calcite into.

[Fel]

You can make your calcite-farming platform have a "request" with a maximum amount (and a minimum if you want it to keep a specific amount for itself).
There is a second part of the slider on the right, anything above that amount is automatically sent to the trash slot and for your platform it means that it is automatically sent to the planet it is set for.
So for example if you set calcite on Fulgora to 50-100, it will request some if it has less than 50 and send down anything above 100 when above Fulgora.

This is how you handle this kind of things, rather than having the landing pad on the planet request it.

[Serendipitous]

Well you can start actually requesting calcite on your space platform. Set min and max amount. If you make sure that all calcite you have is more than max amount requested, you will never drop more than difference between current and max. On the other hand if you have too little calcite, you can get one from planet.