Yesterday, the welder finished the frame and I picked it up! The welds look fantastic and the dimensions are all correct. The batteries and shock absorbers fit perfectly, which I was a bit concerned about. There was only one small minor detail that deals with hole orientation that was off, but that was my fault and not the welder's because I didn't specify. But as a whole it looks great. The pop can is a point of reference so you can see how large it is | |
The rest of the chain for the tracks came today. All 45ft. These are very heavy duty (40P roller chain) and I am very excited to assemble. 800 holes need to be drilled. I need to find a very efficient way to drill these or else this is going to take ages.
I also received the rest of the bolt order, 100amp Hella Switch (with key), gold plate fuse holder, and the 8 gauge wire.
When I was looking at the 900 watt scooter motors http://www.monsterscooterparts.com/24-volt-900-watt-electric-motor-11-tooth-chain-sprocket.html, I noticed the specifications were off
It says it draws 34 amps. However, according to Watt's Law (P= V*A) 24v * 34a = 816 watts @ 100% efficiency
So assuming the motor is 80% efficient, its a 700 watt motor. Something doesn't add up.
So I decided I would start looking at alternative motors with a better reputation. I searched for a while, but finally came across the NPC-1200 Motor. These are 1.5HP that draw 39 amps at normal use and can draw up to 200 amps at stall current! They are monsters. Here is a link http://www.robotmarketplace.com/products/NPC-1200.html
I am very interested in these except they are $245 so I emailed them to see if I could possibly get a discount because frankly I don't have the funds to pay that much. These seem to be the perfect motors though if I can get them for a lower price. This company has a great reputation plus they are located in Mound, MN, which is right next to where I live. They have contracts with the Navy, Army, NASA, and several other highly regarded organizations so I trust they have quality products.
It says it draws 34 amps. However, according to Watt's Law (P= V*A) 24v * 34a = 816 watts @ 100% efficiency
So assuming the motor is 80% efficient, its a 700 watt motor. Something doesn't add up.
So I decided I would start looking at alternative motors with a better reputation. I searched for a while, but finally came across the NPC-1200 Motor. These are 1.5HP that draw 39 amps at normal use and can draw up to 200 amps at stall current! They are monsters. Here is a link http://www.robotmarketplace.com/products/NPC-1200.html
I am very interested in these except they are $245 so I emailed them to see if I could possibly get a discount because frankly I don't have the funds to pay that much. These seem to be the perfect motors though if I can get them for a lower price. This company has a great reputation plus they are located in Mound, MN, which is right next to where I live. They have contracts with the Navy, Army, NASA, and several other highly regarded organizations so I trust they have quality products.