Messages

Hi Mike,

Ah ok, thanks for the reply.
Maybe I will hook up the old pc and run the armtest test. I have a Saleae logic analyser so maybe I can have a look at what data is being sent back and forth and work out what's going on.

I also want to see how the opto-board detects the slots in the drive wheel. One side has two slots and one side has one slot. I assume the micro on the board detects the sequence of one or two slots as a rotation home flag or rotational end stops as such, like the equivalent of a end stop on a linear system.

I was thinking I could make a replacement PCB with a PIC micro to auto detect the slot sequence and and have three pins which would represent the home position, and two more for the equivalent of a rotational end stop in either direction.

I am only looking at this for use with a Duet 3 board and OpenPNP, to see if I could use the exiting RV4 boards for these signals or if I need to use something else.


Thanks again, and I wish you all and happy new year. I hope 2025 is a good year for everyone.

Paul

Hello Everyone,

This may be a long shot but I am trying to find further information about the two PCBs in my RV4.
I have attached a picture of each, but would like specifically to know the pinouts of the the connectors, as in what each pin does and what the signal to expect etc. The larger board is the one fitted on the arm and the small PCB is the one fitted to detect the slots in the lower driver wheels.

Any information on these boards, such as functionality or RS232 data etc would be really helpful.
The larger PCB has a MAX232 chip on it so I assume that this board has some serial comms.
If that is the case, does any know what commands or data to send to it or what data to expect from it, format etc.

Thanks
Paul

I just priced up two timing belts (T2.5 950 13mm) from Bearing Shop UK. Including VAT and postage (£2.40) it comes to a total of £84.02. I nearly fell of my chair. LOL.

Can't seem to find any other alternatives apart from some Dunlop branded belts, but these are described as budget belts and the only other make I found was Optibelts but they only had 12mm width (totallybelts.com).

Any advice on what are the best replacement belts to buy would be helpful. I can always order the belts from Bearing Shop but just thought I would ask again, before coughing up 84 quid.

Thanks
Paul

Hello all,

I want to replace the motor drive belts on my RV4S.
As many of you know these are marked up as T2.5-950

My question really is where do I buy good replacements from?

Searching the net brings up many suppliers from RS to eBay with various prices up to £30+ each and and different types of materials etc.

My existing belts measure exactly 12.6 mm wide, so I assume that's what I should replace them with.

What is the ultimate drive belt for these machines?

My belts don't look too bad, but I am 'upgrading' my RV4S to run with OpenPNP and a Duet3 6XD controller and really I would like to put new belts on as I have the robot assembly ripped apart at the moment and it would be good to know they are new without any issues.

If anyone is interested in this, I could start another post documenting my progress, which may or may not be successful!

Thanks
Paul