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Search found 68 matches

by Trogdor!
Mon, 26 Dec 2011, 21:22
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

http://3.bp.blogspot.com/-OL81zB4ghEY/TcEwvlazHhI/AAAAAAAAAAM/bJK89kne8CI/s1600/IMG_0136+sm.jpg http://2.bp.blogspot.com/-h6tRgNmhQgM/Tvf5ha8P2WI/AAAAAAAAAHk/KYQvXhCgxo4/s1600/IMG_0360sm.jpg Before and after :) That's the machine today doing work in the orchard. I've added a bunch more pics to the ...
by Trogdor!
Thu, 13 Oct 2011, 02:02
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

I'm leaving the preload business aside for the moment while I sort out the final wiring of the machine. My next quandary is earthing . The machine will have 3 Kelly controllers running off 48v, a 48v to 12v DC-DC converter for accessories, and a 48v to 240v AC inverter for power tools. Does anyone k...
by Trogdor!
Sat, 01 Oct 2011, 02:33
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

You might be right - I had a chat to the neighbour who's a fitter & turner and didn't have much experience with these bearings, but referred to a section of a book he had that talked about doing up trailer bearings, where it said you tighten the castellated nut until the washer under it is just bein...
by Trogdor!
Wed, 28 Sep 2011, 19:23
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

I only got onto it yesterday when I had the machine apart to send one arm to the sheet metal people to make up covers for the motors. Got 2 new bearings, with the 2 halves put together with a smear of RTV silicone between (no gasket) and fully cranked down, the cups were held but not very tightly - ...
by Trogdor!
Fri, 16 Sep 2011, 15:58
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Brilliant - thanks for all that. So the fundamental thing is that the bearings should have 4-5 thou of preload.

So if I have this right, I measure the gap X with no gaskets, subtract 4 or 5 thou from X and the result is the compressed thickness of the gaskets required?
by Trogdor!
Thu, 15 Sep 2011, 05:09
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

It's like the one on the left - if you look at part 20 you can kind of see the raised bit that goes into the housing and presses against the bearing. Part 21 has the same.
by Trogdor!
Wed, 14 Sep 2011, 17:05
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Cheers for that - unfortunately I'm not near the machine at the moment, but I do have a parts diagram as provided by the manufacturer in Israel. Afron Wheel Gearbox Parts Diagram This looks to be a slightly newer version of my gearbox, but only in terms of the drive input - the main clamshell (which...
by Trogdor!
Tue, 13 Sep 2011, 23:37
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

The shims were the stacked thin paper gaskets on the caps that held in the taper roller bearings. These disintegrated when the caps were pulled off, so very difficult to determine what the effective thickness was. I actually can't remember if there was a gasket between the gearbox halves - I used RT...
by Trogdor!
Tue, 13 Sep 2011, 20:10
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Adverse Effects wrote: just ask if you need to know it


OK - how should I put it all together correctly?
by Trogdor!
Wed, 07 Sep 2011, 03:08
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Anyone know about taper bearings? This is the guts of the wheel gearbox: http://1.bp.blogspot.com/-kVsmeOLeU5c/TfxSFiDarII/AAAAAAAAACA/zub25XBalI8/s320/IMG_0264+sm.jpg And this is it in one piece and mounted: http://1.bp.blogspot.com/-bEVbelQyEO0/TfxYayJqhgI/AAAAAAAAACw/iBhbred5p7c/s320/IMG_0282+sm....
by Trogdor!
Mon, 08 Aug 2011, 16:22
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

One thing that came up when I was discussing the ins and outs of fitting an inverter to a machine is earthing - you're meant to connect the earth of the inverter to the chassis (and ideally also use an RCD) however many inverters tie earth/neutral to the -ve of the battery, and the manual for the Ke...
by Trogdor!
Mon, 08 Aug 2011, 15:44
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

48v inverters aren't that common (although the UPS idea is a good one - I might see if I can get one at the local IT auctions) and I was hoping that with a big-arsed unit I could use the machine as a mobile power-point for use with bigger tools like a demolition hammer, but I see your point. The Ryo...
by Trogdor!
Mon, 08 Aug 2011, 05:49
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Probably time for an update - the machine's been put to work doing pruning - everything is still exposed with temporary wiring and control panel, which is useful to evaluate the ergonomics of the controls and what needs to be improved in the final layout. I ended up getting a 48v charger from EV Wor...
by Trogdor!
Wed, 06 Jul 2011, 15:14
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

I've got a Jaycar trade card, but in my experience the discount tends to be bugger all - maybe 5% on a good day. Is the battery imbalance thing likely to be that much of a problem? Admittedly these are second-hand units which have already done time in a phone exchange, but would get a a balancing ch...
by Trogdor!
Wed, 06 Jul 2011, 04:11
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

With regard to charging, I was thinking the same thing - at the end of the day you drive to the nearest power point and just plug in. However, individual 12v chargers don't seem that cheap. I bought an 8A smart charger from Repco that cost $180 - it seems to go through 4 or 5 stages, which is probab...
by Trogdor!
Wed, 06 Jul 2011, 02:35
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Yeah, originally I didn't spot the fact that the "turbo" feature was current not voltage - no wonder it had almost no effect, except for low speed torque, which should have made me realise what it was actually doing. I emailed Kelly Controllers, they weren't a whole pile of help, the pointed out tha...
by Trogdor!
Wed, 06 Jul 2011, 01:44
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

I thought a bit longer about the speed issue - I had considered the 24/48 battery switching, but it would have required things like break-before-make contactors, and some consideration of the state of the battery config before hooking up the charger. This machine will be lent out to various people, ...
by Trogdor!
Wed, 06 Jul 2011, 01:32
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

If I was doing an experimental machine, I certainly would have gone down the path of low-cost alternatives. However, the situation is that with the IC engine in place, the machine was a working, functional tool, and in converting it, I had to ensure that it was just as capable, functional and reliab...
by Trogdor!
Mon, 04 Jul 2011, 20:43
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

If they're potentiometers, your high/low can probably just be an extra resistor you switch in series with one end of the pot. That was my first idea. And it almost killed me http://forums.aeva.asn.au/smileys/smiley1.gif I put in a switch to add in a 3k3 resistor on the 5v side of the joystick pot. ...
by Trogdor!
Mon, 04 Jul 2011, 19:18
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

So it's all back in one piece and working - the wiring is temporary - I'm using some thick-ish speaker wire for the moment - the wires to the motor get a bit warm, the wires from the batts to the controllers don't, as the max amps seems to be around the 20-40A mark, so 10A-20A per controller, which ...
by Trogdor!
Mon, 20 Jun 2011, 04:20
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 2189

Kelly Brushless Setup Problems

Won't be long till you have the thing driving around! I was in a bit of a panic as pruning has started, the netting needs to be tied up and this machine needs to get working. I thought for a while there that I'd made the wrong choice in drive setup and there'd be a long delay finding a working solu...
by Trogdor!
Mon, 20 Jun 2011, 01:10
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 22547

Convert 1975 Afron Cherrypicker?

Are you sure that you are "swapping the sensor order" correctly? But surely it would not run as well as it does with the sensor wired incorrectly. I think that the fact that the motor did run reasonably well at least in one direction put me off the trail, as I had tried changing the sensor order, w...
by Trogdor!
Mon, 20 Jun 2011, 01:03
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 2189

Kelly Brushless Setup Problems

Ahem. Well, it turns out these aren't the Worst Motors in the World after all, and that despite me thinking that I'd traversed the set of permutations of phase and sensor connections, turns out I hadn't. Surprisingly, with the motor and hall sensor connections correct, the motor runs smoothly and qu...
by Trogdor!
Sun, 19 Jun 2011, 17:12
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 2189

Kelly Brushless Setup Problems

with no load on it there shouldn't be a voltage drop issue. It should also draw the same current in both directions. In my old bike I was running the motor backwards the whole time :) That was my thinking, which is why I thought I'd be fine using light gauge wire while doing bench tests, but when t...
by Trogdor!
Sun, 19 Jun 2011, 04:45
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 2189

Kelly Brushless Setup Problems

if it's all working 100% it should be smooth and seamless in forward or reverse. That's what I was expecting, but it's *much* noisier in reverse, and draws almost 3 times the current. If you get a moment I'd suggest watching the youtube video - you'll hear the difference when it's running backwards...