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Messages - paul

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1
Zero Motorcycles Forum | 2013+ / Re: 2013 Zero lineup
« on: October 13, 2012, 01:23:51 PM »
Quote from: NoiseBoy on October 03, 2012, 11:20:33 PM
Well i have to say i'm a little miffed as my ZF9 limited edition is due to arrive in a crate from Belgium next week.  Having said that the 2013 range looks great and i imagine in the future it would be relatively simple to 'upgrade' to 2013 parts without having to buy a whole new bike.

Anyone else wondering what the ZF11.4 with a size 6 controller would be like?  I know i am.

With some considerable trimming to the rear of the frame and a new heatsink with completely a different rear mounting bracket, a Size 6 Sevcon on a '12 or '13 S/DS should be somewhat workable. 

The bodywork that covers the heatsink will need heavy trimming, if it still fits at all, but being able to shoehorn in a Size 6 was considered during the Size 4 integration.

2
Zero Motorcycles Forum | 2012 and older / Re: Two Caibration Questions from a New Owner
« on: October 09, 2012, 08:08:57 PM »
All precision measurements have a margin of uncertainty that is unavoidable in reality.  Especially in a high volume scenario like a motorcycle production line, it's unreasonable to expect each and every speedometer to be calibrated within anything better than, say, 5-10% of its true value (value is guesstimate - I don't know actual tolerance offhand).

It's not that law requires it to read high - it's that reading the speed too high is not as bad as reading it too low in the eyes of various regulatory bodies...

3
Zero Motorcycles Forum | 2012 and older / Re: My Agni Experiment
« on: October 09, 2012, 06:44:33 PM »
When I built an e-bike with an Agni motor that got pushed to its ragged edge with an Alltrax 650A controller that ran a few tenths of a volt below its overvoltage cutout limit, I pedaled the bike around the block a few times with the motor engaged to seat the brushes to the rotor before ever hooking up the battery. 

Despite being abused beyond belief, that motor never even had the electrical stink going on, so brush problems didn't seem like they'd ever occur.

Taking it real easy for the first bit of runtime on the motor is essential to any hope of a reliable life IMO. 

Zero always did a burn-in period for Agnis on the bench before installing them, but I think that the less power (if any) that one pushes during the first few few minutes of spinning a motor on fresh brushes, the less likely there'll ever be issues with them...

4
Zero Motorcycles Forum | 2012 and older / Re: Two Caibration Questions from a New Owner
« on: October 09, 2012, 06:25:30 PM »
The battery SOC estimation (aka "fuel gauge") should improve slightly over the first few packs you burn through as the BMS self-calibrates itself.

5
Zero Motorcycles Forum | 2012 and older / Re: 2011 Zero DS owners manual?
« on: October 09, 2012, 06:22:00 PM »
I don't have any electronic copies, but am very familiar with the 2010-2012 manuals. 

If anybody has any questions, feel free to ask...

6
Zero Motorcycles Forum | 2012 and older / Re: Time to vote on the future of electric motorcycles again
« on: October 09, 2012, 06:20:13 PM »
Quote from: protomech on October 09, 2012, 04:03:23 AM
What would you rather them use, a 2013 Zero?

hey, the '13 Zeros will most likely hit the streets before Brammo ever ships the empulse (vaporware) in volume...

7
Zero Motorcycles Forum | 2012 and older / Re: 2012 Zero suspension adjustment and settings
« on: February 12, 2012, 10:27:01 AM »
Yeah, I may have gotten those two switched.

8
Zero Motorcycles Forum | 2012 and older / Re: are zero using the Nano Tech battery by Turnigy?
« on: February 10, 2012, 09:27:00 PM »
Even though we built that bike at my shop, LFP isn't allowed to store nanotech batteries there. 

They are in no way suitable for a production EV because while it's true that nobody else matches the price/energy characteristics of nanotechs, sometimes the whole "most bang for your LiPo buck" thing becomes all too true...

We have more build pics and notes from this project and I may get around to putting some sort of writeup together one of these days.

9
Zero Motorcycles Forum | 2012 and older / Re: 2012 Zero suspension adjustment and settings
« on: February 09, 2012, 12:31:46 AM »
The following values are provided as a recommendation only.  Be careful when you change suspension settings as they can change the handling characteristics of the bike.

2012 ZF9 -S for 150lb rider:
Fork compression: 8 clicks out
Fork Rebound: 8 clicks out
Preloaded shock spring length: 141mm (spring free length is 145mm long)
Shock Compression: 1 click out
Shock Rebound: 14 clicks out
Note: 1 click out = all the way in to last click

Be gentle when adjusting the clickers.  If you hit the end of the adjustment range and try to force the knob to do one more click, you can damage the internal valving.  Translation: don't wail on the knobs with vise grips.


10
Zero Motorcycles Forum | 2012 and older / Re: 2012 Zero suspension adjustment and settings
« on: February 08, 2012, 09:46:51 PM »
which model do you have?

11
Zero Motorcycles Forum | 2012 and older / Re: J-1772 Decision
« on: February 08, 2012, 07:37:17 AM »
The battery charger is the limitation in the case of the J1772 kit.  If there was a charger with higher output, the J1772 could deliver more power through the 220V connector, but since the Delta-Q is capped at ~1kW, that's all you're going to get  out of it regardless of input voltage.

12
Zero Motorcycles Forum | 2012 and older / Re: Real World Range 2012 S ZF9
« on: February 08, 2012, 07:13:57 AM »
There is no need for concern with running the battery so low that it damages the LiPo cells on a Zero.  The battery management system (BMS) watches each cell's state of charge (SOC) and will cut the pack off when they're getting lower than what's the safe minimum (somewhere around 3.7V)

I believe the fuel gauge self-calibrates and should get more accurate over time for 2012 bikes over the first few charges.  I do not know how many charges or how much improvement will be seen off the top of my head. 

I don't think that there is a 1:1 relationship between each bar and a fraction of pack capacity.

The methods employed for SOC determination aren't exact.  A certain margin of error/uncertainty is unavoidable in all currently viable battery SOC measurement strategies.  It's educated guesstimation based upon power in/out, not direct measurement of the charge in the cells.

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