Upgrade roomba 780
- Tutorial
Hello!
I will tell you about my experience how to upgrade 780 roomy using a block of brushes and a basket from the new 800 \ 900 models.
The idea was born after I heard how the vacuum cleaner is quietly working with friends and I realized that the motor in my basket should suck in dust, only makes noise.
In the new models 800 and 900, the dust collector unit contains a brushless motor with a good load and a block of scraper rollers, according to users, the hair that they so liked to gather on the brushes of my rumba does not wind up.
Having studied the question, it became clear that the block sizes are identical and generally compatible with the form factor, there was only one question: how to power the motor of the new basket with minimal effort? With the block of brushes there were no problems, he got into place like his own, it was necessary to cut only small pimples in the place where the block was installed.
The mate of the brush unit does not fit the old basket, it protrudes a little more and has a joint with a channel for feeding dust. In general, the dust collection unit is made more thoughtful on 800 \ 900 models.
In 700 brushes threw garbage and dust into the basket, and in new models it is suction.
In addition to cutting the bumps to install the block of brushes, to install the basket, you will have to cut off the fasteners on which the basket seal keeps, they will prevent you from tightly installing the new basket. It is also required to transfer the basket filling sensors, for this you need to cut a little plastic in the body and move the sensors deep into the body and fix the hot melt glue.
The power contacts of the basket are located on the sides, they will need to spread the old contacts to trim and bend them.
Moving on to the most difficult, the Q79 transistor is responsible for powering the dust collector; its SS8050CBU model has a maximum load of 1.5A. The old motor lacked 0.2A, the new motor would need more current in order for the transistor to not burn out, you need to replace it with something more powerful. At hand was the transistor 2SD882P which is designed for 3A. Unfortunately, the location of his conclusions does not coincide and we had to collectively farm a little.
To start the basket you will need to close the resistor R113 in this case, the power to the motor will be stable.
In order for the motor not to be powered directly and be able to control it, I installed a DC – DC converter on the LM2596, I recommend setting its output voltage to 9V in this case, the current consumed by the motor is 1.2A. You can certainly more, but the battery consumption will increase.
After all the manipulations in the case, it is necessary to cut as far as jumpers in order for the converter to fit in it freely.
The new basket has changed the location of the latches; they fit perfectly into the already existing holes in the case, but I stuck textolite pieces to keep it secure.
When you first start after all the manipulations, the rumba sometimes swears with the error “one to four”, which says that it cannot detect the dust collector, you need to re-start cleaning several times in a row. If the error repeats, then a resistor can be placed on the input of the converter.
After the upgrade, the vacuum cleaner has been working for more than 3 months. Dust collects much better. Hair is not wound on the rollers, but dust is clogged inside the roller itself.
Of the problems I noticed, a quickly discharging battery is sometimes not enough for full cleaning, although I use Chinese li-ion 6000 mAh.
I will tell you about my experience how to upgrade 780 roomy using a block of brushes and a basket from the new 800 \ 900 models.
The idea was born after I heard how the vacuum cleaner is quietly working with friends and I realized that the motor in my basket should suck in dust, only makes noise.
In the new models 800 and 900, the dust collector unit contains a brushless motor with a good load and a block of scraper rollers, according to users, the hair that they so liked to gather on the brushes of my rumba does not wind up.
Having studied the question, it became clear that the block sizes are identical and generally compatible with the form factor, there was only one question: how to power the motor of the new basket with minimal effort? With the block of brushes there were no problems, he got into place like his own, it was necessary to cut only small pimples in the place where the block was installed.
The mate of the brush unit does not fit the old basket, it protrudes a little more and has a joint with a channel for feeding dust. In general, the dust collection unit is made more thoughtful on 800 \ 900 models.
In 700 brushes threw garbage and dust into the basket, and in new models it is suction.
In addition to cutting the bumps to install the block of brushes, to install the basket, you will have to cut off the fasteners on which the basket seal keeps, they will prevent you from tightly installing the new basket. It is also required to transfer the basket filling sensors, for this you need to cut a little plastic in the body and move the sensors deep into the body and fix the hot melt glue.
The power contacts of the basket are located on the sides, they will need to spread the old contacts to trim and bend them.
Moving on to the most difficult, the Q79 transistor is responsible for powering the dust collector; its SS8050CBU model has a maximum load of 1.5A. The old motor lacked 0.2A, the new motor would need more current in order for the transistor to not burn out, you need to replace it with something more powerful. At hand was the transistor 2SD882P which is designed for 3A. Unfortunately, the location of his conclusions does not coincide and we had to collectively farm a little.
To start the basket you will need to close the resistor R113 in this case, the power to the motor will be stable.
In order for the motor not to be powered directly and be able to control it, I installed a DC – DC converter on the LM2596, I recommend setting its output voltage to 9V in this case, the current consumed by the motor is 1.2A. You can certainly more, but the battery consumption will increase.
After all the manipulations in the case, it is necessary to cut as far as jumpers in order for the converter to fit in it freely.
The new basket has changed the location of the latches; they fit perfectly into the already existing holes in the case, but I stuck textolite pieces to keep it secure.
When you first start after all the manipulations, the rumba sometimes swears with the error “one to four”, which says that it cannot detect the dust collector, you need to re-start cleaning several times in a row. If the error repeats, then a resistor can be placed on the input of the converter.
After the upgrade, the vacuum cleaner has been working for more than 3 months. Dust collects much better. Hair is not wound on the rollers, but dust is clogged inside the roller itself.
Of the problems I noticed, a quickly discharging battery is sometimes not enough for full cleaning, although I use Chinese li-ion 6000 mAh.