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SupportOld Support Forum Archive - Info OnlyTransmission (Bearings, gears, sprockets & wheels)Gears / Sprockets / ChainJoining Chain
SupportOld Support Forum Archive - Info OnlyTransmission (Bearings, gears, sprockets & wheels)Gears / Sprockets / ChainJoining Chain
Joining Chain
| Technobots FAQ » Transmission (Bearings, gears, sprockets & wheels) » Gears / Sprockets / Chain » Joining Chain | « Previous Next » |
| Author | Message | ||
| Kevin Grumball Unregistered guest |
How can I join your light duty chain? You only supply it in 1m lengths, but my application needs 700mm between the sprockets, which implies a total chain length of around 1.5m. It's only carrying a light load (a painted canvas), so I was hoping to get away with light duty chain, rather than going up to 6mm steel chain. It's also an issue of what motor to use. I was planning to use a stepper motor, controlled by a PICaxe microprocessor. |
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| Admin (Admin) Board Administrator Username: Admin Post Number: 141 Registered: 10-2004 |
There's a good question, we have not tried it out ourselves!! There are no links available and we would assume that this chain was never intended for extending as it is mainly used for small models. The chain is made from a chain of formed wire links. The way the chain is joined into a loop is to open up the loops with a small pair of pliers, join and close the loops again. There is no reason why you cannot extend the chain in the same way but the length you propose is rather long but maybe we are under estimating the strength of the chain. If you require positional control then a stepper motor is the best way, use a Power 18X project board with the optional L293D driver which will directly drive stepper motors. If you only require a continuous motion, then one of our small dc geared motors will certainly work. |
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| Kevin Grumball Unregistered guest |
How heavy is the steel chain? If I'm not going to use the lightweight stuff, as discussed, then what sort of weight is the 6mm stuff? That is, how much would a metre weigh (roughly)? My problem is that I can only think in terms of bike (or motobike) chains which are a bit OTT for the project I'm looking at. The project needs to move a vertically hung 600x900mm painting (on a canvas), up and down 600mm. That means it's too long for a 1m chain over sprockets. Positioning isn't precise - there are only two positions for the canvas. So I was thinking of using a traditional geared motor and two microswitches (one at each end of the travel). However, I could use a stepper motor instead, I guess, as long as I can calibrate the travel accurately. |
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| Admin (Admin) Board Administrator Username: Admin Post Number: 142 Registered: 10-2004 |
Kevin, Most products have their weight specified as part of the item description (under the add to basket icon). 6mm steel chain is sold by the metre and weighs 120g/m How much does the picture weigh but gut feeling is the lightweight chain will not be up to the duty. |
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| John Unregistered guest |
Do you supply a cranked/ 1/2 link for the 081-1 chain? |
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| Admin (Admin) Board Administrator Username: Admin Post Number: 1194 Registered: 10-2004 |
We have stocks of 1/2 links waiting to be listed on our website, should be within the week. |
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