The Unofficial 'CroMotor' Owners Tech-Tips Thread

[Alan B]

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My CroMotor was delivered to JRH for lacing last week, right on time, 3 weeks from payment. I haven't seen it yet, apparently there is a large number on the side, which is the serial number. I got #5, and I know someone else recently got #14 delivered. JRH reports that it is a 14mm axle, necked down to 10mm at the flats.
...
-JD

Received Hubzilla today. Well packed, however the packing material was consumed in the trip. But the motor looks perfect.

This thing is pretty heavy to be lacing it into a bicycle wheel. Glad to not be planning to do that. Moped rim seems very appropriate.

I measured the axle with my Mitutoyo's. 9.9 mm by 15.8 mm! Very nice for those torque arms and plates!!

The nuts were included and they and the axle appear to be well made. In fact, everything appears to be well done. Definitely a notch up from other hubmotors I've worked with.

Great work from Greyborg et al!

[sn0wchyld]

..
My CroMotor was delivered to JRH for lacing last week, right on time, 3 weeks from payment. I haven't seen it yet, apparently there is a large number on the side, which is the serial number. I got #5, and I know someone else recently got #14 delivered. JRH reports that it is a 14mm axle, necked down to 10mm at the flats.
...
-JD

Received Hubzilla today. Well packed, however the packing material was consumed in the trip. But the motor looks perfect.

This thing is pretty heavy to be lacing it into a bicycle wheel. Glad to not be planning to do that. Moped rim seems very appropriate.

I measured the axle with my Mitutoyo's. 9.9 mm by 15.8 mm! Very nice for those torque arms and plates!!

The nuts were included and they and the axle appear to be well made. In fact, everything appears to be well done. Definitely a notch up from other hubmotors I've worked with.

Great work from Greyborg et al!

and just think, there's people out there lacing the 54xx series into bike rims, that weighs half as much again!!

Anyone got some footage yet of these motors in action?!

[zombiess]

Anyone got some footage yet of these motors in action?!

I should this weekend, finally got up and running tonight with 125V@102A into a 21.5" diameter tire... yeah, it pulls hard and I need to turn the power down a little. Torque is unreal.
viewtopic.php?f=3&t=35834

[markobetti]

I told you : tourgue is crazy sexy cool. Your setup is mad as mad gets
Just imagine ; i am happy with 26 inch wheels tourgue that is giving much more than competitive motors on 84v and youre talking much smaller rims , bigger voltage and amps . But eventually i am going to be running 24 inch ones

[Alan B]

Anyone else measure their axle at 16mm instead of 14mm?

[gensem]

Anyone else measure their axle at 16mm instead of 14mm?

I can check with a caliper when I get home.

[Lavolta]

Hi Guy's,
My first post on this forum.
I got # 6 or # 9 (depending on which way you look at it)
It came with no nuts or washers and the axle measures 16mm.
It will be laced into an Excel 19" Moto rim once the spokes arrive.

When the build is finished I will post some pics.

Cheers
Bruce

[gensem]

Anyone else measure their axle at 16mm instead of 14mm?

I can check with a caliper when I get home.

axle is 10x16mm

[fractal]

the nuts are M16 fine thread(1.5mm)

POST EDIT : m16 and not m12

[Alan B]

Hi Guy's,
My first post on this forum.
I got # 6 or # 9 (depending on which way you look at it)
It came with no nuts or washers and the axle measures 16mm.
It will be laced into an Excel 19" Moto rim once the spokes arrive.

When the build is finished I will post some pics.

Cheers
Bruce

Welcome to ES, Bruce!

I'm confused by the #6 and #9 nomenclature.

My axle threads measure nearly 16mm so I would expect it is M16. I didn't measure the pitch. I'll try to do that tonite. But I may be distracted with the other box that should come. The big one.

The flats are just under 10mm. So that's pretty standard. But the threads are larger than the 12mm on new Crystalyte motors and the 14mm of the 9C.

Mine came with Nuts and no washers.

These new larger flats look GREAT to me. The small flats are a major problem with torque arms and dropouts working properly. This really makes it easier.

Do Kiwi's Greyborg torque plates have 16mm diameter for the axle threads??

[fractal]

i went to a shop called fastenal with my cromotor, the guy measured everything and sold me some m16 fine thread nuts.

edit : m16 and not m12

[fractal]

SORRY I MADE A MISTAKE. they are m16 and not m12!!!! i edited previous posts.

[Alan B]

Excellent. M16 is good.

[Lavolta]

Hi Alen B,

Thanks for the welcome.
My motor has some tape with the number 6 or the number 9 printed on it.
I can not tell if it is six or nine as it depends which way you look at it.

What is the big one ??

I have just recieved notice i also have a shipment arived
one 4 Kw hub motor in a 18" wheel and one 7Kw motor in 17" wheel.

Cheers
Bruce

[oatnet]

I'm confused by the #6 and #9 nomenclature.

All of the motors came with a large "serial number" on them. For example, anderym got SN #1, pictured below, which might help Bruce figure out if his is 6 or 9:

[Alan B]

Ok Bruce. 6 or 9 might be the serial number. Mine has some tape residue, the tape was removed. So no serial number.

The big box still has not come. Expecting a frame and forks to go with hubzilla.

[gensem]

Alan I also have the big cromoly frame and it its a piece of art... but i ll not unleash it till Hal releases a bigger motor.

[Alan B]

Really. 12kw is not enough?

Perhaps you should put one of Luke's Golden Motors on it.

The frame and motor were shipped at the same time. The motor arrived a couple days ago. The frame not yet.

[gensem]

Really. 12kw is not enough?

Perhaps you should put one of Luke's Golden Motors on it.

The frame and motor were shipped at the same time. The motor arrived a couple days ago. The frame not yet.

im thinking of something like 3 magic pies stacked together.
and viva la fiesta...

[fractal]

Hey guys, I need help programming my controller for my cromotor. Any help would be great. Here is my setup :
hub : cromotor 9Kv
controller : Lyen 24 x 4115 MOSFET 84-132V Freeway Speed Controller
pack : 24s 3p lipo (nominal 88.8, off the charge 100.
I have read a lot about programming controllers, a lot of the info is spread out on the forum, i'm still not sure. I just need somewhere to start.
***I want to limit the current to 80 amps, the controller is rated to about 8000 watts

Phase Degree : ?
Phase Current : ?
Rated Current : ?
Halt Voltage : ?
Tolerance : ?
EBS LimVolage : ?
block time : ?

Thanks for any tips!!!

[gensem]

Hey guys, I need help programming my controller for my cromotor. Any help would be great. Here is my setup :
hub : cromotor 9Kv
controller : Lyen 24 x 4115 MOSFET 84-132V Freeway Speed Controller
pack : 24s 3p lipo (nominal 88.8, off the charge 100.
I have read a lot about programming controllers, a lot of the info is spread out on the forum, i'm still not sure. I just need somewhere to start.
***I want to limit the current to 80 amps, the controller is rated to about 8000 watts

Phase Degree : ?
Phase Current : ?
Rated Current : ?
Halt Voltage : ?
Tolerance : ?
EBS LimVolage : ?
block time : ?

Thanks for any tips!!!

I would start at 40 main amps to test and would raise it slowly.
Anyway, if you must use 80a, try something like this and be carefull to not hurt yourself and try not overheating it...

Phase Degree : auto
Phase Current : 200
Rated Current : 80
Halt Voltage : 72-75v
Tolerance : use default
EBS LimVolage : Will need R12 mod for 100v regen
block time : lowest possible

[fractal]

What is the best way to test the Kv of a motor?

[Farfle]

What is the best way to test the Kv of a motor?

If you spin it up under no-load, and record the voltage and speed. It should give you a close kv number.

[Alan B]

Record voltage and RPM at no load.

[fractal]

Record voltage and RPM at no load.

"no load" means the wheel spinning freely with the bike upside down?