TractionAvant
1 µW
- Joined
- Feb 20, 2019
- Messages
- 1
Hello all
Brief introduction; I've been building a speedelec out of a 1950's Dutch Gazelle transport bike frame. It will be propelled by a GM 901 pro hub motor mated to a 48 volt 1500 watt controller. A 13S3P 18650 samsung 2500 mAh pack is in the making. I bought a Sunkko 737G 220volt 15amp spotwelder on Banggood.com to assemble the cells.
However; upon receiving the Sunkko 737G welder it turned out to be broken. It short-cirquits upon plugging it in. It has a dent in the back so possibly transport damage. The entire transformer is dislocated and rolls around inside the casing.
Upon contacting Banggood.com and sending them pictures and video's of the dammage they wanted to see a picture of my cirquitbreaker (which is an ABB 40 Amp. cirquitbreaker). To my great surprise Banggood claims the problem is my cirquit breaker and that it needs to be at least 63 Amp. This is in contradiction to the specifications on their site, and to Sunkko recommendations (I've forwarded banggood.com a mail from sunkko stating 40 Amp should be enough)
. This has been going on for about 10 mails with their custommer service and it seems i'm down about 160 euro's and have nothing.
Reason for me posting this is to warn you not to make the same mistake as I did when ordering this Sunkko at Banggood. Instead considder ordering an arduino-based option which can be cheaper as well.
For instance:
https://malectrics.eu/product/diy-arduino-battery-spot-welder-prebuilt-kit-v3/
Have a good build!
Paul
Brief introduction; I've been building a speedelec out of a 1950's Dutch Gazelle transport bike frame. It will be propelled by a GM 901 pro hub motor mated to a 48 volt 1500 watt controller. A 13S3P 18650 samsung 2500 mAh pack is in the making. I bought a Sunkko 737G 220volt 15amp spotwelder on Banggood.com to assemble the cells.
However; upon receiving the Sunkko 737G welder it turned out to be broken. It short-cirquits upon plugging it in. It has a dent in the back so possibly transport damage. The entire transformer is dislocated and rolls around inside the casing.
Upon contacting Banggood.com and sending them pictures and video's of the dammage they wanted to see a picture of my cirquitbreaker (which is an ABB 40 Amp. cirquitbreaker). To my great surprise Banggood claims the problem is my cirquit breaker and that it needs to be at least 63 Amp. This is in contradiction to the specifications on their site, and to Sunkko recommendations (I've forwarded banggood.com a mail from sunkko stating 40 Amp should be enough)
. This has been going on for about 10 mails with their custommer service and it seems i'm down about 160 euro's and have nothing.
Reason for me posting this is to warn you not to make the same mistake as I did when ordering this Sunkko at Banggood. Instead considder ordering an arduino-based option which can be cheaper as well.
For instance:
https://malectrics.eu/product/diy-arduino-battery-spot-welder-prebuilt-kit-v3/
Have a good build!
Paul