Crap chinese router problems

[charlieuk]

yes its that one! sorry I'm not 100% sure eactly what Modbus is/does. I will try take a few more pics of the wiring when I'm next there.

[Boyan Silyavski]

Could that be that spindle is only controlled by the buttons? Then thats easy, i can look at manual and tell you the things that has to be changed from default to what values. But the Rj grey cable where it goes? The telephone like cable? Thats the Modbus. But in manual i dont see modbus control. Where goes that grey flat cable???

[charlieuk]

you can control the spindle from nc studio on the pc however as soon as your raise the spindle speed over 10000 that is when it cuts out, it strats back up as soon as you go back down.

I will take a look were the grey cable goes when I'm next at the machine.

If you could tell me what the values should be for each of the program setting that would be great! the setting the chap on cnc zone unfortunately did not help. the spindle is 220v 6A and we are on 240v mains power here in Australia.

many thanks

[JAZZCNC]

Can't help on the VFD front other than to say try find a proper manual or swap it out for decent one. Don't see any reason or advantage for using Modbus in DIY enviroment so I'd avoid this if possbile.

On the Rails and bed/steps then this sounds very much like the frame or gantry is twisted. It's affectively rotating the tool on it's axis as it moves along the twisted surface rails are mounted on.

[A_Camera]

Can't help on the VFD front other than to say try find a proper manual or swap it out for decent one.

I agree

Don't see any reason or advantage for using Modbus in DIY enviroment so I'd avoid this if possbile.

Why not? It has only advantages and no disadvantages. Of course, it requires some knowledge about it, but it isn't as simple as "avoid it if you are a DIY user". I think the biggest problem is when people try to do or use something they don't understand, in that case yes, 0-10V is easier because that can be measured and easily see how it is working. However, Modbus is not magic, very simple in fact.

But... many cheap VFDs don't have Modbus at all, just some fake serial protocol or implemented Modbus wrongly, like the HY. That's why it needs a plugin and can't be controlled via Mach3 brains or UCCNC Modbus plugin.

[JAZZCNC]

Why not? It has only advantages and no disadvantages.

Yes If you know how to speak Modbus and the Modbus is implemented correctly at both ends. I agree if more advanced speed control and monitoring is required then Modbus is great tool and not rocket science to learn. However The good old KISS method is all that's needed for simple speed control at DIY level so why complicate matters when not needed.?

[charlieuk]

It wouldn't surprise me if it is twisted as like some one said it is mostly cast, Its defiantly not something I would purchase and shows the need to have good reliable electronics. If it was mine it would be in bits already and replace a lot of it or start again but its not and I'm just trying to help as much as I can.

we have been in contact with the supplier however the only manual we can get for the inverter in in Chinese, were that English scanned copy came from I have no idea and I have spend a good few hours searching and emailing around.

We have had anouther problem come up also now with the z axis going straight up to the top and hitting the home/limit switch as soon as you start any file, even ones that we have run before and this problem happened over night between turning it off and restarting it the next day so think the vfd may be the least of our worries.