Upgrade? Chinese CNC Machine

[Carlb1058]

Now your where you should be... thats cool it was the hardware(maybe LOL) not the electrics (maybe) All the clever ones are called john in one form or another LOL

Rick

Rick,

Yep gettin' there, just uninstalled, rebooted, re-installed, rebooted, re-setup Mach3, rebooted, loaded the g-code for the 100mm X line and the 100mm Y line and get 102mm on both. . .

used stock settings of 400 steps, 2000 velo, 200 accel for both X&Y, Z is 400s, 700v, 100a

[Ricardoco]

Rick,

Yep gettin' there, just uninstalled, rebooted, re-installed, rebooted, re-setup Mach3, rebooted, loaded the g-code for the 100mm X line and the 100mm Y line and get 102mm on both. . .

used stock settings of 400 steps, 2000 velo, 200 accel for both X&Y, Z is 400s, 700v, 100a

its very odd because the measurements indicate that you have 4mm pitch screws.
Well at least they are both the same now.. LOL You can now try the math we talked about last night.. 400/ (cut length - tool dia) x input cut length= new steps per..

Rick

[Carlb1058]

its very odd because the measurements indicate that you have 4mm pitch screws.
Well at least they are both the same now.. LOL You can now try the math we talked about last night.. 400/ (cut length - tool dia) x input cut length= new steps per..

Rick

I'll try the new number (413.11 to the nearest dp) shortly, it's bucket'in down and the part time work I've got to keep me in toys keeps askin' me when I'm gunna do some so I best do some aye LOL

I'll let ya know how it goes. . .

[Jonathan]

its very odd because the measurements indicate that you have 4mm pitch screws.

The eBay listing indicates he has 4mm pitch screws and 20 turns moved it 80mm, which also indicates 4mm pitch screws as 80/20=4mm. So nothing to worry about.

The voltage readings are strange - should have got 5V or 0V, but nevermind as we now know they're set to 1/4 microstepping.

[Carlb1058]

(bit snipped for space)
The voltage readings are strange - should have got 5V or 0V, but nevermind as we now know they're set to 1/4 microstepping.

I didn't get anywhere near 5v, the readings I got were after atleast a dozen tests the first few were around the 2.7 - 3.2 range and they slowly dropped until they stayed pretty static at 2.2 - all three chips did exactly the same thing.

I wonder if it's worth just throwing an extra 90 bux at it for a board with dip switches etc?

[John S]

NO.

If you are going to throw money at it get the separate drives.

More reliable and if one goes down you can replace it, if one of those Toshiba boards goes down the whole lot is toast.

[Ricardoco]

Hey John I agree those boards are rubbish, what would you suggest he gets remembering his budget?

Rick

[Carlb1058]

NO.

If you are going to throw money at it get the separate drives.

More reliable and if one goes down you can replace it, if one of those Toshiba boards goes down the whole lot is toast.

Like this? 3x M542 CNC Stepper Driver For Nema17 Nema23 Nema34 Motor +5 Axis Breakout Board | eBay if so that'll be a doddle, her who must be obeyed should only hit me two or three times at that money plus that means more money for longer screws etc as I want to build a bigger one now!!

[Swarfing]

That would certainly do the job and you can also run the steppers at a higher voltage (50v) with those.