see the ‘smoke herder’ thread
They are not currently available, but will be in the near future.
In the meantime, you could find another motor controller board that will
control 3+ DC motors using PWM for speed (and run in either direction) and make
it work with small software tweaks.
David Lang
I found these
[ DC12V Turbo Worm Gear Box High Torque Geared Reduction Motor Encoder 10-100RPM]
Encoder included on the motor
It reports the 30RPM has:
| Speed(rpm) | 10 | 20 | 30 | 40 | 100 |
|---|---|---|---|---|---|
| Rated Torque(kg.cm) | 22.5 | 12 | 7.4 | 5.6 | 1.5 |
| Max.Torque(kg.cm) | 25 | 25 | 25 | 24 | 6.4 |
| Reduction Ratio | 600 | 340 | 200 | 150 | 40 |
7.4kg torque, and 25kg holding, but 200:1 gear reduction, the 20RPM one has alot more torque in movement but the same in holding
This one too…but less info on the ratio or holding power…motor looks larger than the first one
Hey, I am trying to source all the parts by myself and as local as possible to prove a point for a university project.
Regarding the driver chains, what would be a suitable length on a Maslow with a default frame including a top beam?
10’ off ebay
11 ft, but you will probably want to just get a 100’ roll of chain and a chain
breaker rather than ordering a custom 11’ length (10’ is a common pre-made
length, 11’ isn’t and a pair of custom 11’ lengths from someone like mcmaster
will probably cost more than a 100’ roll from e-bay)
for a 12’ top beam, you need 12.5-13’ each
David Lang
unfortunantly 10’ is not quite long enough, you need 11’
David Lang
I can easily find chain breakers for bicycle-size chains, but i couldn’t find a larger version that would fit the Maslow chains.
I have crap Google-Fu… 
Any thoughts on a reliable supplier for the UK/EU?
If you just need to break it once to get two lengths you can honestly do it with a nail and a hammer and some pliers. The chain tool is really needed if you want to put it back together. It won’t be pretty, but it will be a lot faster than waiting for a tool to arrive.
If you do want to buy one something like this will do it:
The chain size is industrial standard #25 chain
I tried the nail and hammer method, just bent links. I was trying to find a dremel with a grinder attachment, when I came across a chain saw sharpener we somehow inherited. Just ground off the rivet ends (or whatever they are called) and slid them out. Just wear safety goggles.
Take a look on Amazon that’s were I got mine from.