Homemade Tiltrotator - How hard can it be ??

[doobin]

Hose mounting for the rotate:
A bracket is permanently mounted onto the machine, with a locking pin allowing the cross-line relief valve assembly to be quickly installed or removed while keeping the hose routing neat and tidy.
Overall, I’m really pleased with how the geometry has worked out, and the belt drive helps keep everything compact by stopping the motor from hanging out the back.

Hose mounting for the rotate:
A bracket is permanently mounted onto the machine, with a locking pin allowing the cross-line relief valve assembly to be quickly installed or removed while keeping the hose routing neat and tidy.
Overall, I’m really pleased with how the geometry has worked out, and the belt drive helps keep everything compact by stopping the motor from hanging out the back.
View attachment 82074

If your motor is turning quick enough at 20lpm on the 2nd aux, and has the torque to work properly, then patent it quick!

Every mainstream brand needs to be running at 50l/min on those size machines.

 

[Will_c]

If your motor is turning quick enough at 20lpm on the 2nd aux, and has the torque to work properly, then patent it quick!

Every mainstream brand needs to be running at 50l/min on those size machines.

Engcon, Rototilt, and Steelwrist all appear to use a 50cc displacement motor, so depending on the worm wheel reduction ratio, in theory they should all rotate at a fairly similar speed when supplied with the same flow rate.

A 50cc motor can only handle 20-25l/min

 

[6feetdown]

First test of the homemade tiltrotator!

For the time being, I’ve mounted the bucket directly to the underside of the tiltrotator to keep the overall build height down until I look into developing an S-type hitch.
The tilt and rotation functions are working really well, and there are no clashes with the thumb.
The belt drive for the rotation has turned out to be a compact and surprisingly quiet solution for transmitting drive — about as compact as the major manufacturers’ setups.
It’s currently rotating at around 10 RPM using the secondary auxiliary line, with the motor limited to 20 L/min.
Weight-wise it is fairly heavy, as expected, but the machine seems to handle it well.
One thing I do need to look into is the auxiliary line setup for the tilt function. At the moment, pushing the right-hand toggle to the left tilts the bucket down to the left. swapping the hoses over and it immediately felt much more natural.
Is there an option on a Bobcat to invert the auxiliary controls electronically, or is it best to simply swap the hydraulic lines over?

We definitely now need some practice to utilise it properly.

View attachment 82070

Awesome work

 

[doobin]

Engcon, Rototilt, and Steelwrist all appear to use a 50cc displacement motor, so depending on the worm wheel reduction ratio, in theory they should all rotate at a fairly similar speed when supplied with the same flow rate.

A 50cc motor can only handle 20-25l/min


View attachment 82075

You’ve clearly done your research, but my ec02 is painfully slow to rotate on the 2nd aux on my e27. It’s been running at full flow on the main aux for around a thousand hours.

20/25 litres a minute is less than most 1.7t machines main aux even.

 

[Will_c]

You’ve clearly done your research, but my ec02 is painfully slow to rotate on the 2nd aux on my e27. It’s been running at full flow on the main aux for around a thousand hours.

20/25 litres a minute is less than most 1.7t machines main aux even.

With the motors driving such a large gear reduction, it’s unlikely they are ever required to use the full torque available from the motor. As a result, increasing the flow rate will simply make the rotation speed faster (overspeeding from there rated specs) .

From exploded diagrams the Engcon units are fitted with two over-centre valves. I’m not entirely sure whether these are primarily there to protect the motor from over pressuring or to help hold the tilt circuit in position when under load.

 

[doobin]

What is the rated rpm for an ec02? I’ll measure mine and compare.