F.van.Gent
In Memoriam

Wie kan mijn helpen aan het aansluitschema van bovengenoemde
A B C Control
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If my Latin from school-days is correct, 'fundere' or 'fusum' to melt - is the origin of the fuse we use in protecting our electronic circuits. In the early days of steam a fuse was also used to protect boilers from exploding. It was in the form of a 'plug' which melted above the fire, when the boiler ran dry, releasing steam and quenching the fire. It was a natural progression into electrical circuits for the fuse principle as electricity replaced steam as an energy source.
Miniature boilers and pipework also need protection from the 'running dry' possibility not only, from water but also from the energy source - gas etc. Up to now most steam 'buffs' have achieved this protection by careful management on the water using time and consumption calculations which has generally meant short sailing times before replenishing. What was needed was a system which monitored consumption
including steam pressure and automatically replenished water from a tank limited only by the size of the boat. Couple this with safety monitoring of the system with visual and audible warnings and economic gas consumption and you have worry free long term sailing. This is the exciting news from Cheddar Models, which have perfected a system available from this month - January onwards - Automatic Boiler Control.
Simple as ABC?
The pic shows the prototype operating a Puffin engine and vertical boiler with the ABC unit in the right foreground. It is totally automatic and self contained and most important NO EXTRA radio functions are required on the TX & RX. However you do require two additional standard servos, battery supply and additional pipework to supplement the ABC kit. Look at the schematic to see how the system, works, noting that the electronic wiring is shown RED and pipework BLUE. Water level is set by sliding an electronic sensor up and down the gauge glass. Boiler pressure is monitored by another sensor and can be screwdriver adjusted in the ABC box. The two servos can be seen at the base of the boiler. One controls the Water Control Valve and the other the Gas Control Valve. Having set water level, pressure and fired up the system the Red LED on the ABC unit will be flashing indicating gas 'on'. Once pressure has reached the desired point the GCV servo will operate the valve and continue to do so as steam is consumed. As water is consumed the gauge glass sensor monitors consumption enabling the ABC unit to operate the WCV and replenish the boiler via the water pump indicated by the Yellow LED.
Once the boiler is satisfied the water control valve by-passes the supply from the pump back into the feed tank and the Yellow LED is extinguished. The third LED, Green, indicates feed water tank low and initiates an inbuilt audible alarm and at the same time the pump circulates (double BLUE arrows on schematic), what water is left in the system preventing all the seals from drying out. (I would prefer also to see the facility of being able to couple the ships siren to the alarm feature so that the 'helmsman' is fully alerted) In the unlikely event of the boiler running dry the gas burner will reduce to a pilot flame. The system can be retro, fitted to all current and past production boilers but a prudent call to Cheddar prior to ordering is advised. Price incl. VAT £199.00 plus post and packing.
Radio and Steam do mix
Coincident with the ABC news, the new 'horizontal' engine I mentioned in November's Steamboats and the
Graupner Glasgow paddletug on November's cover the 'marriage' of electronics and steam does require a little extra thought regarding installation to minimise possible failures. Steam is water vapour, is invasive and can cause corrosion. Where possible locate the RX, its power supply and switching as far away from the steam installation as possible. Treat gas, water and steam pipe 'runs' as 'dirty' and keep electronic wiring separate from them. The nature of steam generation using both heat and water can create difficulties with electronics once the superstructure is in place particularly on a hot day when the ambient temperature is high. However any possible failures can be prevented by sensible gear placement and regular checks on all connections. I would strongly recommend the liberal use of Contact Cleaner Lubricant and Contact Treatment Grease on servo leads sockets/RX servo output pins and lead extensions if used. Don't forget the power supply leads, switches and the RX crystal socket/crystal pins. Both the Lubricant and the Grease are available in aerosol form from Maplins - order code DM85G and DH87U, One word of warning, DO NOT under any circumstances use the sprays when the steam plant is operational and the burner alight. Wait until the whole plant is cold and the burner is 'out'.
Ja de man die het cheddar gedoe deed is overleden.
En nu heb stuart het overgenomen maar alleen de puffin dat wiebel machientje zeg maar.
En de abc die hun nu ook hebben is alleen voor het gas en dat heb ik zelf ook.
En dat werkt goed hoor.
Maar mijn boot geruild voor de VOLHARDING Daar zit alles er op en er aan.
Dus ook het vullen van de ketel
Mvg
Frederik
Ik heb ook even gezocht en kom tot het volgende:
er moet bij zitten:
- een sensor die om het peilglas heen moet
- een druksensor die de keteldruk meet
- een sensor die aangeeft of er nog genoeg water in de voorraad tank zit.
- een LED (deze gaat branden zodra de voorraad tank te leeg wordt)
er moeten 2 servo`s worden aangesloten,
1x om gas naar brnders te regelen
1x om bypass vanaf de waterpomp te regelen.
wat moet nu waar ?
dat is de grote uitzoek klus.
er zijn 9 aansluitingen....
2 zijn er nodig voor de voeding (batterijhouder met aan/uit schakelaar + en -)
2 voor peilglas sensor
2 voor druk sensor
2 voor laagwater in voorraadtank
dat maakt al 8 de LED zou nog op 9 kunnen en dat die de massa vanad een andere aansluiting haalt.
maar ik kan zo snel niet vinden wat waar moet....