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Design and implementation of a wall painting machine using rollers

Question asked by satanas in #Coffee Room on Oct 22, 2009
satanas
satanas · Oct 22, 2009
Rank D2 - MASTER
Hi. i have always seen painting systems using sprayers to paint cars, objects and buildings, etc. so i am wondering if implementation of an automatic wall painting machine is possible, using water-based paints. more eco-friendly.

the machine would be initially positioned in front of a flat vertical wall and when the system is started, the roller would move up and down, reciprocatingly and paint being fed on the roller. it paints a fixed surface area,depending on the roller length, then move to next area- considering overlapping (approximately 5cm).

any idea guys how to achieve the reciprocating motion? rack and pinion, belt, chain and sprocket.

ideas and designs are the most welcome. Posted in: #Coffee Room
Aashish Joshi
Aashish Joshi · Oct 22, 2009
Rank B1 - LEADER
how about using linear actuators??
satanas
satanas · Oct 23, 2009
Rank D2 - MASTER
linear actuators?? how?? i would like some more information about it.. well, linear actuators in the vertical plane. wat will happen if power goes off?? also, i have seen that in the vertical axis, you can't have big loads for this kind of mechanism- it will be more economical to use pair of rollers instead of 1, thus your paint feed system will be proportionate to the num of rollers you use--> increase your load..

chains and belts are simpler for the reciprocating motion..use dc motor and reverse it using relays and limit switches or the famous H-bridge..

but the length of stroke will be limited..assume you can paint only 1.5 m with a prototype.. how to make extend it to paint upper surfaces while the system is designed to be on wheels, i.e. it can move to next surface area autonomously?? a real problem!!

ideas WANTED real quick guys!!

anyway, can you guys suggest wat sensors would be required while moving along the wall?? i thought of adding 2 arms with 1 free wheel on each arm.. they make contact with the wall, hence keeping a fixed distance bewteen platform and wall without the need of sensors n feedback to maintain that distance..( i think i might have to add sensors to detect if the wheels are really in contact with wall or not!! when it moves to next area to be painted).. what sensors would be best to detect wall distance, openings along direction of travel and obstacles along travel?

regards, satanas
4d1
4d1 · Oct 27, 2009
Rank D2 - MASTER
satanas
any idea guys how to achieve the reciprocating motion? rack and pinion, belt, chain and sprocket.

ideas and designs are the most welcome.
how about using cam and follower ?
gohm
gohm · Oct 27, 2009
Rank A3 - PRO
why not use spray guns for this application too? I think that would be easier and more cost effective then robotic arms using rollers.
satanas
satanas · Oct 27, 2009
Rank D2 - MASTER
hi 4d1,

won't the length of strokes be dependent on cam diameter?

if it can paint a wall of 3m-approximately 1.9m without extension, plz give me more info.

thx
satanas
satanas · Oct 27, 2009
Rank D2 - MASTER
hi gohm,

i have considered spray guns but am using normal water-based paint.. can it work?
gohm
gohm · Oct 29, 2009
Rank A3 - PRO
Yes, you can use that meathod for acrylic paints. They make over the counter machines you can purchase.

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