Crap chinese router problems

[charlieuk]

Cheers yes a lot of frustration, it shows its never worth going for the cheap China option.

I have spoken to the chap on CNC zone but not been able to sort it I'm now lead to believe that the vfd may already Maxed out.

Had more issues yesterday doing very odd stuff!

The bed is aluminum with a spoil board on top. The rails on the y axis are supported round rails, we havnt yet been able to measure them but what is odd is that if the rail were bent you would elect the table to be smooth and follow that curve rather than being smooth fort the first half and then havnt angled cuts for the second, sorry I forgot to take a picture of the fault will do so next time.

[Boyan Silyavski]

Many parts are cast, so thats why the holes are off centre.

These Chinese things need urgent controller change for sth better. As that is the very nest of problems on any machine, the unstable controller.

Spindles and VFd normally are Not a problem. Most VFDs have a Voltage input adjustment so it make regulating RPM very easy. All must be properly grounded also or you will never get stable RPMs

Obviously all should be properly aligned and centered as i wouldn't trust a cheap machine has that right. meanwhile Locktite on all possible parts so to avoid future problems.

Start with posting model of VFD here, i or others may help.

[charlieuk]

I would totally agree however its not my machine so hard to do to much. There is a lot I would do to it, add limit switches, replace the board and change to Mach 3 from nc studio, change the z axis and there are no barring blocks on the ball screw! Etc ect

How hard is it to change the board? at the moment I think it will only allow us to use nc studio so changing it would probably solve multiple problems I expect! but this sort of thing is not my strong point.

The pic of the motor mount plate is bellow not sure if it was cad or not but you can see how shocking the holes are and no its not the camera angle making it look worse it was that bad!

The vfd is hl3000-25-t I have a manual I was given I will add the link. A chap on cnc zone has been trying to help but no luck yet, I'm not sure its us doing something wrong or the setting at the moment we have tried all sorts.


https://get.google.com/albumarchive/...5GUjQnN2_s6Odx

[Boyan Silyavski]

I remember now, the other thread about the manual.

So now is MODBUS connected? Bahh, then thats the problem, combine shady BOB and connect it using Modbus and chinglish software and manual and....

For me is a no brainer. DDCSV1 controller for 150 euro, no Mach# or 4 PCs etc., connect to VFD , via analogue voltage control and voilaaaa.

[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

[A_Camera]

I would totally agree however its not my machine so hard to do to much. There is a lot I would do to it, add limit switches, replace the board and change to Mach 3 from nc studio, change the z axis and there are no barring blocks on the ball screw! Etc ect

How hard is it to change the board? at the moment I think it will only allow us to use nc studio so changing it would probably solve multiple problems I expect! but this sort of thing is not my strong point.

The pic of the motor mount plate is bellow not sure if it was cad or not but you can see how shocking the holes are and no its not the camera angle making it look worse it was that bad!

The vfd is hl3000-25-t I have a manual I was given I will add the link. A chap on cnc zone has been trying to help but no luck yet, I'm not sure its us doing something wrong or the setting at the moment we have tried all sorts.


https://get.google.com/albumarchive/...5GUjQnN2_s6Odx

Don't start changing anything without knowing that it must be changed and that it solves the problems. It may however help if you'd install a trial version of Mach3 and run that as well. Are you using Modbus to set the set the spindle speed? Are you sure that VFD is a real Modbus capable VFD? Most cheap Chinese VFD are NOT real Modbus. The manual pages are just lousy scanned picture, not pdf, so you must read every word, can not search. It also seems incomplete because the communication is not described. So, if you run Modbus I would suggest to go back to basic digital control, in fact, start with manual control from the control panel. Take the next step when that works.