Greyborg Cromotor Hubzilla motors, Sold Out

[Doctorbass]

most of the sealed ( not vented or cooled electric motor) like the hub are are rated Class H wich is the highest common NEMA insulation class and is 180 celsius for the winding.

Teflon typically melt at 260 celsius so phase and hall wire with teflon coated wire is perfect. Nylon wire are bad idea and common 105 degree C standard wire a bad idea too ( i'm talking for people that would intend to install bigger size phase wires)

http://www.engineeringtoolbox.com/nema-insulation-classes-d_734.html

Class B is used on most integral horsepower motors. Classes F and H are generally used for NEMA motor designs which are special applications. Do not confuse the NEMA insulation classes with the NEMA motor designs which are also given by letters.

http://elpaso.apogee.net/md/mfnrins.asp


Some more interesting info:

[zombiess]

Got a small delay in shipping, the motors should be headed out from Greyborg to me this Monday. I doubt they will be here by March 31st like we thought. Probably 1st week of April.

[Microbatman]

Zombies
Thanks for update. Obviously sooner is better. But things happen.
Appreciate you communicating the delay right away as soon as you found out. Sign of a reputable vendor.
I dont mind being told that something is going to be late. Communication is the key.

No worries, we will still wait like an 8 year old the night before Christmas.
Thanks for taking the risk financially and time to import this breakthough product.

[zombiess]

Thanks for understanding,

We thought we'd have them to me by the 31st but crap happened, most of it was prepared for and we had a buffer zone on the 31st delivery date to deal with it, but BS>Buffer by a little and the clock ran out on Friday to get the shipper to pick them up. I've dealt with international shipping several times and nothing ever seems to go to plan, just the way of the world I guess. Motors are all packed and are being shipped to me through an air freight service (so no long wait on a painfully slow boat form China). I'll post an update when I'm told the shipper has them and transit begins. I've already filled out all the proper paper work so unless customs decides to put a hold on them for a few days to inspect them they should get through customs fast.

[hillzofvalp]

JRH said to use the ebikes.ca spoke calculator for the 9c and just add 2mm. What I'm wondering is does this also apply to the flange revision that you are shipping?

[zombiess]

JRH said to use the ebikes.ca spoke calculator for the 9c and just add 2mm. What I'm wondering is does this also apply to the flange revision that you are shipping?

I have no idea as I don't know much about building wheels. It's a question best directed to JRH.

[chroot]

Thanks for the update.

[justin_le]

Justin has the info so it's up to him if he wants to add it.

Hey guys, so based on the parameter data provided by Zombiess and others, there's a new motor on the simulator called "NoName5004" (50mm wide by 4 turns). We'll leave it as 'noname' until I actually have a chance to do an independent physical testing, but a lot of assumptions are pretty safe bets (like doubling the stator width will double the heat capacity etc). The information on the no load current draw confirmed that the drag torque was right inline with what we'd expect from taking an HS or 9C core and extending the length to 50mm, and based on the winding info and previous experience with these stlye stators I'd predicted about 300uH phase inductance. This is well within the margin of "inductance uncertainty" to the 275uH that was directly measured, as there is such thing as a clearly defined single inductance value for something wound a laminated steel core anyways.

We'll be curious to see if your observational stats match up!

Justin

[John in CR]

Thanks Justin, something new to play with. I predict that statement related heat will be repeated incorrectly many times over.

[teklektik]

Hey guys, so based on the parameter data ... there's a new motor on the simulator called "NoName5004"

Excellent. Just a few minutes with it answered many questions...

Justin - Many thanks for taking the initiative and stepping up for the forum members

[gensem]

Thanks Justin.

[hillzofvalp]

Thank you. It's nice to see that I should be seeing the same amount of torque I currently get at 0mph now at 30mph

[zombiess]

The battery amps are on the optimistic side in the simulator compared to what I'm seeing. I PM'd justin with my observed data to see if he wants to tweak it a little. Speeds are within 1-2mph of what I'm getting when I put my info in so that looks good.

[zombiess]

Just bumping this to let everyone know that Greyborg hit a technical problem at the end which is delaying the shipment of the motors by 2-3 weeks. I've refunded all deposits because of this and will post updates at a later date. Sorry guys, but it's going to be a few more weeks. The situation is out of my control and Greyborg is doing what they can to resolve it as quickly as possible.

[hillzofvalp]

[zombiess]

:(

Trust me I know, we all feel the same way. This is why I've been so adamant about not holding onto much of peoples money until I knew I would be able to deliver in a reasonable amount of time.

My goal is to make sure I can keep my customers informed and happy, but in business it doesn't always work out as smooth as you plan. That is why I have my own very strict money handling policy. I've seen too many internet deals/dealers/group buys go wrong and I don't want to be one of the guys that people hate because he ran off with everyone's money and didn't deliver any products.

The motors are still going to be available in the very near future, but this time there will not be any deposits. It will be a complete sale after the motor is in my hands ready to ship.

Jeremy Wolf
Dodecahedron Solutions Inc
Greyborg USA Distributor

[chroot]

Received the fund from you that I sent you for the deposit.

Bummer! Hope everything is going work it out and I still looking forward to get a hand of the cromotors coming.

Thanks

Sent from my Tbolt smartphone using Endless Sphere app

[zombiess]

chroot, I have a large order of the motors coming to me, just later than expected so you won't miss out if you want them after I have them in stock.

[chroot]

... what's the status on hubzilla motor and Are you still going get these motors coming?

[zombiess]

... what's the status on hubzilla motor and Are you still going get these motors coming?

They will eventually be here, I'll see if I can get an update to post.

[chroot]

You better be! My race bikes (2) waiting for the hubzilla cromotor.

[Microbatman]

Refund was recieved as stated.
Got it. Thanks for 1st class service and ethical handling of money.

Courious as to what the technical issue is that caused the delay?
Was it customs? Was there a problem that was found in quality control check?
Will I still keep my place in line when first shipment arrives?

[hillzofvalp]

I wonder such things, too.

[zombiess]

Courious as to what the technical issue is that caused the delay?
Was it customs? Was there a problem that was found in quality control check?
Will I still keep my place in line when first shipment arrives?

So here are the details for the delay. The motor axles did not pass a final QC check which was done right before they were ready to be shipped to me. While they were plenty strong the manufacturer did not follow the diagrams on how to make them and just did what ever they wanted. In a certain type of dropout it could cause a possible issue with pinching the wires so Greyborg decided to hold off shipping them and get all new axles made to the spec they intended and change them all out. They do not want to release a product that does not meet their standards.

New axles are now 16mm with standard 10mm flats as the originals were. I'm awaiting final length measurement, but they were ordered to be longer than the original axles. Greyborg is now in the process of changing out the old axles for the new ones.

That's the reason for the delay. Typical Chinese manufacturing. They can produce good products, but if you can't afford to have someone babysit the company making your product they will do what ever they want and there is very little you can do about it.

I'll update everyone when the motors are ready to be shipped to me.

Jeremy

[chroot]

Frickin awesome, I cant wait get hand of hubzilla once they sort it out with the axle quality control. I am gonna love Greyborg forever for superior QCs. Thanks for the updates.