Newbie with 3040 machine

[Neale]

Do the stepper drivers have adjustable current settings? If so, are these appropriate? Too low and you will get missing steps or worse...

When you say that the motor exhibits the symptoms, do you mean that driving the motor even when it is not connected to the machine hardware still gives missing steps?

[Rwoolley]

Do the stepper drivers have adjustable current settings? If so, are these appropriate? Too low and you will get missing steps or worse...

When you say that the motor exhibits the symptoms, do you mean that driving the motor even when it is not connected to the machine hardware still gives missing steps?

Yes, problem exists when the motor is uncoupled and sitting in my hand I can feel the loss of steps intermittently.

I'm unsure of current settings as there is no information on the motors or the driver electronics.

[cropwell]

I don't know if this helps, http://www.china-cncrouter.com//down...7282452561.pdf I have had a quick look and the only info I see about motor current is that it is set at 1.8A.

You might have to open up the box to see what board is inside to find out how to check and set driver currents.

Here's a website that might have some thing of use :-
http://www.chinacnczone.com/en/china...czone_l49.html

Cheers,

Rob

[Rwoolley]

I don't know if this helps, http://www.china-cncrouter.com//down...7282452561.pdf I have had a quick look and the only info I see about motor current is that it is set at 1.8A.

You might have to open up the box to see what board is inside to find out how to check and set driver currents.

Here's a website that might have some thing of use :-
http://www.chinacnczone.com/en/china...czone_l49.htmlf

Cheers,

Rob

Thanks for your input Rob, I have explored the two link since you kindly posted,nothing in there rings any bells unfortunately.
As said previously the controller is marked prt-e750 and I've been unable to find anything on the web pertaining to it.
The driver cards are marked TX 14207 on the etch and the driver chip is a Toshiba tb6560ahq, the spec sheet for this device has pins for high/low current so I'll have to trace out pins to the relevant switches on the board. The stepper motor windings measure only 1.1ohm, there are no markings to identify the motors so I'm unsure if the motors can handle a higher current.

[Clive S]

The stepper motor windings measure only 1.1ohm, there are no markings to identify the motors so I'm unsure if the motors can handle a higher current.

I would not worry about the steppers as they will be happy to at least 50C in other words if you can still keep your hands on them they are fine.

[Rwoolley]

I would not worry about the steppers as they will be happy to at least 50C in other words if you can still keep your hands on them they are fine.

I thought to eliminate the PC just in case from a Dell motherboard to an Asus motherboard. This was due to a diagnostic within Mach3 that tests the pulse frequency in the PC. Mach3 said this pulse frequency was too high and whatever I did with settings didn't seem to change it. The change in motherboard - problems have disappeared! I'm running some g-code but have yet to set up the motors properly. Things are looking positive at the moment.....