doug72

Read the forum guidlines on how to post images, photos, videos. 100K is only for your avatar image.

Checked other forums and they open OK.

Seems to be down, can log onto all the other Eurobricks forums OK. anyone else have the same ? Doug72

Thanks for the info now figured how to get a longer delay.

Akiyuki Through unit:- Dwell Unit (MOD) My previous attempt at building this was not very reliable so dismantled it, found many parts were cracked where axles pass the connector blocks etc. Completly Rebuilt and made sure all new connectors used. As I required a through unit to act as a delay unit it no longer required the drive to a loader module. To achieve this I removed the gearing that drives a loader module and replaced it with a gearing for dwell system. Dwell parts are white Drive to this is by 8T gear and a 24T clutch gear. The clutch gear is mounted on a fixed axle. see images. The white 24T gear provides the resistance to ensure the train car leaves once both chocks are lowered. Using an L motor train car the delay is 6 seconds Using an M motor train car the delay is 10 seconds. Tested and functions well.

With a shock absorber it depends on what spring it has, soft or hard. Soft not enough force, with a hard spring it could push the train off the reverser. With rubber bands you can add more to increase the force if required to trip the reversing bar on the train car. Rubber bands are easy to add, unlike changing a shock absorber. Loom bands are ideal £1 for 100

Thanks for the info. I am going to re-build the through unit and adjust the time delay using step down gearing. The problem I had was the first chock getting stuck in the hold position.

New Improved GBC Train Loader & Unloader (Update) Double cross-over track. I have changed all 4 settings for the track switches to the other position. This switches the train cars to the other track. This gives much better run timing. The loaded train car now enters the double reverser on the reverser track that releases that train first. This means it can unload in to the loader inbox before that is set in motion when the empty car arrives.

Nothing like it,

If you use 2 X thin 2L beams & a bush you longer have the middle axle hole, the new part allows 1/2 L spacing ideal for aligning gears.. The LEGO Technic Half Beam Cam (6575) has the same axle hole spacings as this new part has.

Thanks for your comment. Re Black ring, I assume you mean the square black ring that hooks over the loader inbox. The unloader is designed to connect to any standard GBC in box in line or a right angles. The slight jolt seen in the video, as the train car enters the additional gear rack/ guide section has been eliminated by removing the first sections of rack and replacing them with a 4 x 1 tile. Pity about the GBC Contest being put back until next year ! Will have to think up a new module now.

Attempt 3 with two trains running:- Successful - Video Just managed to fit the layout on the dining table ! After much adjustments and tweaking I have got the 2 train cars running together to load & Unload 30 balls per round trip. Two L motor cars are used with a double reverser & a double cross over track. Tried using the dwell module but had problems with the L motor train cars jamming or over riding the stops. Instead I have synchronised the the unloader module with the loading module but adjusting the train release point after balls are loaded. Overall View: Overhead View: Had some issues with unloading unit when train car with loader ball hopper did not fully entering the lifting frame and engage with the 24T gear to run the lift. Solved by adding gear racks and guides on last piece of track before the unloading module, see image. Additional gear racks & guides for unloader. Video.

I use the old fashion way using pen & paper with a calculator for all my GBC gear ratios.

Yes they are vey hard to find and are expensive. Some sellers show an image with small black switch but actually its the later version without. I had return one as wrong type sent. re instructions, there are some made and the links are on the index page, I have no idea how to make them, there plenty of images on this forum. The original rotary dumper can be very hard to get it running, that’s why I made MOD version which easy to align & run consistently. Any queries just ask.

This forum lists all the Type 2 train system MODs. There are some minor mods for the original Type 2 train car, replacing the 3 part axle with a single axle & a geared down version. There is also a MOD using an L motor for increased power. See index on page 1. The main problem now is getting hold of the old type reversing switch with the small black pole reverser switch. The later versions can with care be modified so that it freely changes over.

Video of New Improved GBC Train Loader & Unloader 1st layout:- Failed This used a track double crossover & a double reverser so that two trains could run but due to track lengths being different I could not get the circuit to work as train unloaded into the loader unit to early before the train to be loaded had arrived resulting in balls escaping every where. 2nd Attempt:- using a single train with a Vee Reverser. Successful after some tweaking to stop balls escaping from the unloader as they discharged into the chute. Able to carry 30 balls in train car hopper and ciruit time was 1min. 3rd Attempt:- yet to be tried. This will use a the train delay unit which had to be modified slightly as it needs to have some resistance in the output to make it work. Might be possible to use a passing train module. For this I have used a wheel with tire which gives enough resistance to make it delay work correctly. As the track layout will be longer due to the double X-over I will have to move from our dining table down on the floor !! Modified Train Delay unit:

Great to hear you are having success, any problems just ask. There is a MOD for the unloader replacing the two shock aborbers with simple counter weights arms. I have made a re-designed stepper loader & unloader and will be making a video of them running today. Doug72

Problem Connecting bucket part to large track links. Recently after prolonged testing of my Train Incline GBC ball loader I noticed that the bucket connection was becoming loose from the track links & affecting timing & clearence from other parts. This due to the LEGO Technic Hole with Pin (15100 / 65487) rotates freely in the track link hole. Initially I glued the pins in place but as this is not Lego legal sought a legal solution. Now found a solution by using 5L thin beams. The hole with pin passes through a 5L thin beam and then the track link. The end lip on the pin part is now tight against the underside of the link and the connectioin is now tight. Just had to re-postition the input box by 1/2L

Thanks, mine is the earlier version without a 12v input, so looks like won't be suitable.

Lego Control Centre 9753. Re-discovered I still had this which was last used for the TC ?? crane contest several years ago. Has anyone used this for driving and controlling GBC modules ? Think it has potential to run a Train GBC Gantry Crane module, to lift a ball hopper, traverse / lower (load balls) raise / traverse / lower back onto train car. Should be able to program the moments up / down left right for 3 motors but how to start the sequence automatically when a train car arrives & stop it when train departs. The control centre has 3 outputs (Yellow / Red / Blue) So red & blue used for the crane movements. Yellow to cause activate the train reverser for train to depart. But is there anyway to detect a train arriving & start the sequence ? p.s. posted is in the general Technic forum for now to reach a wider audience.

Hope you better success than I did when I attempted to build a similar dockside crane in Feb 2018. Look forward to following your progress. I ended up with a very heavy build that caused the chassis to sag and was a very complicated build but it was a valuable learning experience building it.

Great, might be worthwhile creating a new topic of what you are building.

This has a little bit slack but it should work in the space you have. Best to drive it using a worm gear.

Can,t ,t take photo as I removed the rack. I will make mock up & post it later today.