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Forum: Electric Projects 01-14-2020, 08:39 PM
Replies: 30
Views: 821
Posted By bnolan
Ran into problems with the chain coming off, and...

Ran into problems with the chain coming off, and don't have the tools to mill a proper motor mount with slots to adjust tension. Biggest problem is ran out of time for this festival season, will have...
Forum: Electric Projects 12-18-2019, 04:49 AM
Replies: 30
Views: 821
Posted By bnolan
Ok, got the ESC spinning the motor. Tomorrows job...

Ok, got the ESC spinning the motor. Tomorrows job is to get an arduino to generate voltage ramps of 0-4v and try feeding that to the throttle wire.

edit: Tested the throttle signal line at 1.5v...
Forum: Electric Projects 12-18-2019, 03:36 AM
Replies: 30
Views: 821
Posted By bnolan
Ok! Hah. I fixed it :D :D I pulled the...

Ok! Hah. I fixed it :D :D

I pulled the sprocket off and it fit the chain perfectly. So I noticed a large spring washer on the motor spindle. It was larger than the valleys in the sprocket so...
Forum: Electric Projects 12-17-2019, 06:10 PM
Replies: 30
Views: 821
Posted By bnolan
Ok - I found something interesting. If you put...

Ok - I found something interesting. If you put the sprockets very close together so that only 3 or 4 teeth are contacting at once - then it runs quite well without skipping. I'm going to try shorten...
Forum: Electric Projects 12-16-2019, 02:48 PM
Replies: 30
Views: 821
Posted By bnolan
It's meant to be a 25H sprocket (I ordered it...

It's meant to be a 25H sprocket (I ordered it from aliexpress as 25h 9t but lol). I've sourced some 11:54T sprocket and t8f chain locally so I can at least get everything hanging together while I...
Forum: Electric Projects 12-16-2019, 01:03 AM
Replies: 30
Views: 821
Posted By bnolan
Ok, new problem. I've got 25H chain, and it fits...

Ok, new problem. I've got 25H chain, and it fits the 91T rear sprocket perfectly, but the 9T sprocket I have for the motor skips.

This video shows it:

https://imgur.com/a/rkE36Cz

What causes...
Forum: Electric Projects 12-14-2019, 05:37 PM
Replies: 30
Views: 821
Posted By bnolan
Ok, got my hands on 3 x 33ah 12v AGM scooter...

Ok, got my hands on 3 x 33ah 12v AGM scooter batteries, so battery pack is sorted. Got some smaller trolley wheels with bearings for the front wheels. ESC should arrive in next few days and I can...
Forum: Electric Projects 12-13-2019, 08:24 PM
Replies: 30
Views: 821
Posted By bnolan
Got the frame made up and wheels mounted. I try...

Got the frame made up and wheels mounted. I try to mount the sprocket to the wheel using the some existing threaded holes in the spokes. However, I drew the template badly (going to re do it on the...
Forum: Electric Projects 12-12-2019, 03:19 PM
Replies: 30
Views: 821
Posted By bnolan
Ok! Replaced the threaded rod with a high tensile...

Ok! Replaced the threaded rod with a high tensile bolt and nut, and spaced it with some washers Thanks for your patience with me :D

Next up is to get some standoffs machined for the 91T sprocket....
Forum: Electric Projects 12-11-2019, 07:05 PM
Replies: 30
Views: 821
Posted By bnolan
Hey thanks guys, I did some more reading and can...

Hey thanks guys, I did some more reading and can see the problems with threaded rod.

How do I attach the wheels to the frame then? The only thing I can think of is a long M16 bolt, so that the...
Forum: Electric Projects 12-09-2019, 02:14 PM
Replies: 30
Views: 821
Posted By bnolan
Ok, cancelled the lithium battery order, going to...

Ok, cancelled the lithium battery order, going to use 3x 40ah 12v batteries.

Building the frame out of aluminum cross section bolted to 12mm plywood. Frame will be 1200 x 600mm. Wheels will be...
Forum: Electric Projects 12-01-2019, 10:13 PM
Replies: 30
Views: 821
Posted By bnolan
Started work on the arduino code and frame. ...

Started work on the arduino code and frame.

Going to have individual control of left vs right motors, enforce that you have to be at a complete stop before reversing motor direction. Have a button...
Forum: Electric Projects 11-28-2019, 06:14 PM
Replies: 30
Views: 821
Posted By bnolan
Oh good spotting - looks like the autometer...

Oh good spotting - looks like the autometer signal is analog 0->18v with RPM!

https://endless-sphere.com/forums/viewtopic.php?t=96736

The "autometer signal" is interesting. It seems analogue...
Forum: Electric Projects 11-26-2019, 05:33 PM
Replies: 30
Views: 821
Posted By bnolan
Does the motor speed come from one of the wires...

Does the motor speed come from one of the wires on the ESC or do I need to add a seperate sensor somehow? Could I poll one of the hall effect sensor wires to get a rough idea of the motor speed?
...
Forum: Electric Projects 11-26-2019, 05:16 PM
Replies: 30
Views: 821
Posted By bnolan
Hi, thanks for doing the maths! And yes, I have...

Hi, thanks for doing the maths! And yes, I have two controllers, sorry missed that bit. The specs say 4nm per motor, so I think the couch will work ok - may need a bit of a push to get going, and...
Forum: Electric Projects 11-26-2019, 03:12 PM
Replies: 30
Views: 821
Posted By bnolan
Motorized sofa: 2x MY1020 BLDC, 1000w @ 36v

Heya,

I've been keen to build a motorized sofa for a festival. Something like this (https://www.youtube.com/watch?v=qvlCc7pFVyM) but slower and with more torque.

I've ordered two MY1020...
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