New FW- doorstop

**Danjr1** · 21st March 2012, 19:08

decided to completely change the design. will hopefully get it done for the champs!

**archie2000** · 21st March 2012, 19:39

interesting :-?

**Danjr1** · 9th April 2012, 15:13

new and hopefully improved version! just waiting for the 5mm steel wedge and proper wheels and its all done. gone for 2 motors instead of 4 so that the armour can be built stronger.

**Leonardomayo** · 9th April 2012, 15:22

Have to admit, I wanted to see how 4 of those motors would work in a 2 wheel bot. :P
Looks very nice though. What are those things on the back for? Just to stop it balancing?

**Danjr1** · 9th April 2012, 15:29

they are two steel spikes which add a little weight, stop it resting and allow a little offensive capability when reversing (or upside down and going forwards). With four motors, it worked fine. had no issue with the drivetrain but the armour/ structure just looked flimsy so removing two motors saved over 1.5kg which went on armour and allowed the bot to be smaller.

**PJ-27** · 9th April 2012, 15:57

Looks very neat!

I do like Polycarb on robots, very satisfying being able to see inside.

**archie2000** · 9th April 2012, 16:25

it looks good
I was dissapointed to are it go from 4 motors to 2 with massive gears
nice work

**Danjr1** · 18th April 2012, 18:04

have a issue with the current build which I'm looking for some advice on. Basically, the bot is currently running a 5mm steel wedge with a welded bend in it and this is held in place by six 65mm and two 25mm wood screws which screw into the side panels. Im now beginning to believe that this won't generally be enough as the metal will become distorted/won't be any good against spinners. Therefore, I have two solutions:

1. a bent wedge shape (as it has now) but the wedge sections would be made from two pieces of 15mm HDPE. The side panels would be made longer and the screws would bolt into the wedge sections through the side panels, meaning I could get at least 12 screws holding it in place. It would be more expensive as i would need kenny to machine the wedge angles as they are quite extreme.

or

2. a flat 1 piece ramp wedge (angle would be 39 degrees form the horizontal), again made from 15mm HDPE. secured in the same way as above. Would be cheaper as i think i could get the angles cut on a table saw with a angled table.

The first option would be more interesting but the second would be cheaper. both would be supported underneath via some HDPE inserts.

Thanks in advance for any advice!

Dan