ToSeven DM02 Problems ?

S

ScooterMan101

1 MW
Joined
Oct 6, 2012
Messages
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SF Bay Area California
I have been researching the ToSeven DM02 unfortunately there seems to be allot of problems with it .

It seems to be the first generation so I understand it will have some problems , too bad because I really want to get one.

Since this is such a new motor there needs to be
a list of the problems people are having so that the People at ToSeven can go to work fixing the problems .

To keep this thread short and to the point ...
Only post the problems and/or how that problem
was fixed .
 
Last edited:
I did buy a DM02 last Novenber, but other than seeing if it spun the motor, I have yet to install it. Will report in April,

The facebook toseven group admin is run by a guy who used to sell TSDZ2 installs. The admin says he now sells DM02 installs because he had too many complaints about the TSDZ2B power being too low,

My experience is that the TSDZ2 was inconsistent because of poorly adjusted torque sensors. Mine barely worked until I installed OSF firmware. That got me excited enough to do a TSDZ2B for my wife. WIth OSF, it's a different motor.

Anyway. let's talk about DM02. Mine has the old pre-October display firmware, which allows full configuration of motor assist levels. Apparently, too many people went full power and burned up their units, so new displays have been locked down.
 
ScooterMan101 said:
When you say people went full power, what kind of power levels did they do to burn up the motor ?
Click to expand...
more than 800W. Toseven was stupid enough to allow users to run it at 52V 18A. With latest firmware max power limit is set at 14A. I have older unlocked firmware and I reduced power limit even lower to 10A.
 
Last edited:
ScooterMan101 said:
I have been researching the ToSeven DM02 unfortunately there seems to be allot of problems with it .

It seems to be the first generation so I understand it will have some problems , too bad because I really want to get one.

Since this is such a new motor there needs to be
a list of the problems people are having so that the People at ToSeven can go to work fixing the problems .

To keep this thread short and to the point ...
Only post the problems and/or how that problem
was fixed .
Click to expand...
I've done over 1500 km and zero issues. There are folks with almost 8000 km on odometr. DM02 is reliable motor if you keep it at nominal power (~500W)
 
Atak_Snajpera said:
more than 800W. Toseven was stupid enough to allow users to run it at 52V 18A. With latest firmware max power limit is set at 14A
Click to expand...
Knowing you have done 1500 Km so far is a little reassuring , what size chainring do you have on it ? What is the BCD ?
With a befang you can get an adaptor and change out chainrings which I have done and it works great.

Will it run with a 52 volt battery ? because that is one of the batteries I have, besides the 6s packs that I put in series to make a 12s pack . I would like 600-700 watts sometimes .
Would it do that out of the box ? or does the DM02 need programing by the end user ?
 
ScooterMan101 said:
Will it run with a 52 volt battery ? because that is one of the batteries I have, besides the 6s packs that I put in series to make a 12s pack . I would like 600-700 watts sometimes .
Would it do that out of the box ? or does the DM02 need programing by the end user ?
Click to expand...
Yes. It supports batteries up to 52V.
 
ScooterMan101 said:
Knowing you have done 1500 Km so far is a little reassuring , what size chainring do you have on it ? What is the BCD ?
With a befang you can get an adaptor and change out chainrings which I have done and it works great.

Will it run with a 52 volt battery ? because that is one of the batteries I have, besides the 6s packs that I put in series to make a 12s pack . I would like 600-700 watts sometimes .
Would it do that out of the box ? or does the DM02 need programing by the end user ?
Click to expand...
Default 42T. For me it is optimal.
 
@ Docw009,

Because of the many problems I have been reading about I have already decided to not get a
tsdz2 or even the tsdz8. I would consider a tsdz8 sometime in the future when they are a few generations newer and have have something that works out of the box . I do no know how to
do any programing , even on a bbs02/bbshd.
 
Atak_Snajpera said:
Yes. It supports batteries up to 52V.
Click to expand...
Oh good so it will do apx 700 watts with a fully charged
14s pack , and 600 watts when the battery is 20% or so.
Does it work out of the box without having to program anything with a computer ? I like kits that have the adjustments that can be done on the display .
 
ScooterMan101 said:
Oh good so it will do apx 700 watts with a fully charged
14s pack , and 600 watts when the battery is 20% or so.
Does it work out of the box without having to program anything with a computer ? I like kits that have the adjustments that can be done on the display .
Click to expand...
On older firmware you had to tweak few things on display because assist was to strong even on lowest levels

However this ADVANCED MENU is no longer accessible after november so you are stuck with settings set by factory.
 
I have a bike with a larger than usual bottom bracket area , the BBS02 did fit in there just barely , however I now have the BBS02 on a dedicated mountain bike. Hence the search for a new mid-drive for my errands running simple bike. Is there more / less or the same amount of room between the body of the motor and the axle that goes through the bb ?
 
Atak_Snajpera said:
more than 800W. Toseven was stupid enough to allow users to run it at 52V 18A. With latest firmware max power limit is set at 14A. I have older unlocked firmware and I reduced power limit even lower to 10A.
Click to expand...
I agree, mine was set to 15 amps out of the box and that was heating up the controller on steep climbs. I reduced my max to 12A (sport setting) but mostly use the 5A (eco) and 8A (city) max settings when climbing. I also run the stock 42t chain ring and max 50t rear on a 9 speed cassette. With proper design parameters, I think this motor may be reliable (yet to be completely determined) 600km of stress testing so far.
 
Atak_Snajpera said:
more than 800W. Toseven was stupid enough to allow users to run it at 52V 18A. With latest firmware max power limit is set at 14A. I have older unlocked firmware and I reduced power limit even lower to 10A.
Click to expand...
Surely you mean Toseven did the right thing to begin with, and users were the stupid here.

edit: fwiw., my bbs02 has been working just fine w/25-30A(@only 48V, thought) - which makes Toseven seem really weak.
 
Last edited:
aae34 said:
Surely you mean Toseven did the right thing to begin with, and users were the stupid here.

edit: fwiw., my bbs02 has been working just fine w/25-30A(@only 48V, thought) - which makes Toseven seem really weak.
Click to expand...
Controller is suspended in air so heat transfer on case is not great.
 
Atak_Snajpera said:
Controller is suspended in air so heat transfer on case is not great.
Click to expand...
I see, so the design is lacking on cooling. Bafangs also have a temperature sensor in controller, to limit
the heat input when necessary for keeping operating conditions sustainably healthy for the controller
without artificial limits on current.
 
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