KV Accord metering unit, retro fitting electric drive

[Andy26]

I'm attempting to retro-fit electric drive to a KV accord metering unit on a 4.8m drill

I have an RDS AC100 Lite kit that was originally intended for a cultivator mounted air seeder, so it isn't quite designed for the Accord meter per se but I *think* it will work in the circumstance.

The electric motor is a Dunkermotoren GR63X55, which has the following specs: 12V, 3000RPM, 75.4W (174W Max.), 3.17 Constant torque. It is mounted to an SG80 right angled gearbox with a 50:1 ratio. Thus its maximum RPM to drive land meter unit is 60RPM.

The KV accord factory fit electric motor for the same era of drill is a Dunkermotoren GR80X40 which has the following spec: 12V, 2700RPM, 97.5W (194.7W Max.), 3.6 Constant torque. I'm unsure what gearbox it uses.

So the motor I have is approx, 20% less powerful than the factory fit, but also my drill is 20% smaller than the designed maximum.

With a maximum speed of 60RPM to the metering unit at full rate I calculate a maximum drilling speed of 8.82kmh. Obviously won't be drilling at maximum rate often, if ever, so will be able to go considerably faster.

Does my theory that this will work sound ok? Or have I a case of confirmation bias?

 

[Chae1]

Think @Phil P fitted rds electric drive to his one.

 

[Andy26]

Think @Phil P fitted rds electric drive to his one.

Searching back through old threads I see @Phil P has fitted a full fat ISO bus VR, made for the job.

The concern with my effort is if the motor is upto the job, with no seed in the hopper the metering mechanism turns freely by hand, with a tank full of seed how much extra resistance is there?

 

[Zebbedee]

Worth a try I reckon, it’s when motor is going slow that it will heat up I reckon as volts will drop to facilitate speed drop and put amps up therefore heat up as well?

 

[Sosb79]

We fitted a 12volt motor on our fiona 3metre box drill on the back of our power harrow. Works really well, its max speed is 60rpm and will turn right down to 15rpm br altering the voltage through a pwm controller. Gimson robotics set me up with it and were really helpful and sensibly priced. All things considered I would do it again and would recommend it.

 

[Andy26]

We fitted a 12volt motor on our fiona 3metre box drill on the back of our power harrow. Works really well, its max speed is 60rpm and will turn right down to 15rpm br altering the voltage through a pwm controller. Gimson robotics set me up with it and were really helpful and sensibly priced. All things considered I would do it again and would recommend it.

Wish I'd asked you before, Gimson look very helpful:

Gimson Robotics - Homepage

We are one of the foremost developers and suppliers of automation equipment in the UK, including electric actuators, control systems and related accessories. Through this website you can order many items for delivery from-stock, or you can contact us to discuss bespoke project work.

gimsonrobotics.co.uk

Always assume small electronics will charge a fortune and not be interested in small projects.

 

[bravheart]

@towns

 

[Treemover]

can I be bold and ask, could
https://gimsonrobotics.co.uk/catego...fob-x3-remote-transmitter-433mhz-rolling-code
this be used to operate my central locking on my landcruiser?
I lost the original key, and I think its €350 for a replacement.

 

[DanniAgro]

In the past I toyed with doing the same thing to my Accord, and research showed that a 4m used a 400W motor, slthough I've seen more modern drills use 250 - 300W for the same job. So 75W may be too small.

 

[Andy26]

In the past I toyed with doing the same thing to my Accord, and research showed that a 4m used a 400W motor, slthough I've seen more modern drills use 250 - 300W for the same job. So 75W may be too small.

Upto a 6m KV has a 98W motor as a factory fit.

RDS Artemis uses a 400W motor, which I guess covers all widths, types of metering and very high forward speeds.

 

[Andy26]

To update, having spoken to an Engineer friend he's explained the motor and gearbox I have won't really be up to what I need. My motor is connected to a right angle worm drive motor that is not as efficient as a straight through planetary gearbox (as KV use in the factory fit). Thus my gearbox at the the output shaft delivers 4Nm where as the KV unit delivers over 7Nm.

So I have for sale, an as new, to fit an Air seeder such as Stocks Micro Meter, Opico seeder or a small box drill etc. RDS Retro-fit kit for Variable rate, electric metering drive, GPS speed sensor, in cab control box etc...

 

[Pedro-glebe]

To update, having spoken to an Engineer friend he's explained the motor and gearbox I have won't really be up to what I need. My motor is connected to a right angle worm drive motor that is not as efficient as a straight through planetary gearbox (as KV use in the factory fit). Thus my gearbox at the the output shaft delivers 4Nm where as the KV unit delivers over 7Nm.

So I have for sale, an as new, to fit an Air seeder such as Stocks Micro Meter, Opico seeder or a small box drill etc. RDS Retro-fit kit for Variable rate, electric metering drive, GPS speed sensor, in cab control box etc...

Have you gone any further with this project ?? I was considering a front hopper for drilling and was wondering if it would also do fert for maize drill ?? Any thoughts gladly received!