First antweight (want to check if im on the right track)

haz · Post by **haz** » Mon Oct 07, 2013 10:17 pm

http://www.emachineshop.com/

Might be of use to you if you need something that can export as a dxf.

danjr1 · Post by **danjr1** » Mon Oct 07, 2013 10:34 pm

just had a go and seems simple enough! cheers dude!

danjr1 · Post by **danjr1** » Tue Oct 15, 2013 5:29 pm

just tested the drive train and the servo boards haven't worked out. the surface resistors ive used aren't correct so the motors just spin!

does anyone know anywhere cheaper than the fingertech website to get some tinyESCs? its coming in around £62 for two delivered to the UK! Also, does anyone have any experience of using them with a DX6i with its funny mixing to get full throws? This is what puts me off the Botbitz ESCs as they cut out.

Drive train is coming in at 80g at the moment so im happy!

Cheers

Dan

Post by **BeligerAnt** » Tue Oct 15, 2013 5:54 pm

If you have no control over the motors whatsoever, then you probably have an open or short circuit somewhere. Check your soldering very carefully. Try to measure the voltages at the mid-point and at the top of the resistor chain, they will show you where the error is.

If you do have some control but can't get the trim correct, you may need some different resistor values. Try putting the original pot's back, adjust until the motors stop with the tx trims centred, then remove the pot's and measure the individual resistances of each half. You need to use a pair of resistors in the same ratio as the values you measure, although the actual values are not too critical.

Persevere with the servo boards - so much cheaper than FingerTech!

razerdave · Post by **razerdave** » Tue Oct 15, 2013 6:01 pm

If they're the boards I gave you, I think they need different resistors anyway. I learnt a little something after I had made them and I had meant to alter them

danjr1 · Post by **danjr1** » Tue Oct 15, 2013 6:16 pm

Just spoke to dave on the phone who explained that I will need to experiment with the pot to find the resistor values. Im using 2.2k resistors at the moment and I do have some control so im thinking its just the wrong values. Hopefully it a common size otherwise it will be very costly. If anyone can offer any help, im using the MG996R servo boards.

Post by **BeligerAnt** » Wed Oct 16, 2013 7:14 pm

If you have trouble obtaining the resistor values you need, let me know. I may be able to help

danjr1 · Post by **danjr1** » Tue Oct 29, 2013 1:41 pm

Ive changed my design now and was wondering how to bond polycarb to polycarb for the chassis? I've read the normal superglue will work but is this true?

Post by **BeligerAnt** » Tue Oct 29, 2013 9:44 pm

Superglue will weaken polycarbonate over time, and is not really recommended.
Nuts & bolts or rivets are the best bet. Epoxy can be used, but the best way is to drill holes in the pieces to join so that the epoxy runs through the holes and forms something like a multi-rivet joint.
Polycarbonate more than about 2mm thick can be tapped and will hold a machine screw quite well. M2 screws work well if you have thick enough parts to screw into.

danjr1 · Post by **danjr1** » Wed Oct 30, 2013 1:08 pm

ok, epoxy it is!

What thickness do people go for when making 3d printed chassis/ armour? would 1mm be enough or does it have to be a little thicker?

cheers!

Dan

RobotWars101

First antweight (want to check if im on the right track)

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