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OK so iv been trying to set up my 6040 cnc and to be honest i can run it and i have cut some MDF with it, but im not 100% happy with it. The problem i have is if i set the motor tuning to the recommended setting the steppers jam. To prevent this i have to run them at less than half the recommended settings. Here is a video of whats happening maybe someone can help,
https://www.youtube.com/watch?v=O3I8...ature=youtu.be
hope some one can help
It would help if you gave some details about power supply, voltage, motor specs if you have them and driver.
That would be a start so people can make an informed opinion. ..Clive
Also do you have Mach3 set to mm or inches ?
yer sorry this is what i have
http://www.ebay.co.uk/itm/CNC-ROUTER...item2c5eac77af
and this is what in the box and the steppers
Attachment 13327Attachment 13328Attachment 13329Attachment 13330
Attachment 13331
i dont know if that helps.. i also have mach3 set to mm .
thanks for the help Mick
It looks like you have this setup;
3163B Stepper Driver
set to;
Dynamic Current = 2.5A
1/8 Microstep
50% Standstill Current
57HD5401-14S/8 Stepper Motor
1.8 step angle
6.6V
3A
2.2 Ohms
8mH
17kg/cm
4 wire
24v 8.3A DC PSU
1605 ball screws
And that being so, the settings you have seem to be okay as far as I can make out.
However I did a conversion of the motor torque setting and 17 kg/cm = 1.6671305 Nm, this is not so good but as your video shows they are not under load.
I think you could reduce the microstepping and see if that helps, remember to change the Mach3 'steps per' to match.
5m pitch
1.8 deg motor
1/8 microstep (8)
360/1.8 = 200
200/5 = 40
8 * 40 = 320 steps per
------------------------------
Reduce microstepping to 2 by setting K1 ON, K2 OFF
5m pitch
1.8 deg motor
1/2 microstep (2)
360/1.8 = 200
200/5 = 40
2 * 40 = 80 steps per
ok thanks ill try that. im rite in thinking at the moment they are both set to on. so all i need to do is switch k2 down on all three . Then change the steps per to 80 . I do have 3 of these i could try and see if its any better if that dose not work .
http://www.ebay.co.uk/itm/EU-Free-Sc...item338efc0758
The problem with these motors in the inductance is far too high. Check these out:- http://cnc4you.co.uk/resources/60BYGH301B.PDF and see the difference, the motors you have require a much higher voltage to drive them. I would be selling them and getting some with lower inductance. ..CliveQuote:
Originally Posted by amxen
Now you have lost me with inductance. i got this kit awile ago with the plane to make my own cnc but ended up buying one . this is the kit i have spareQuote:
Originally Posted by Clive S
http://www.aliexpress.com/snapshot/6104230003.html
but i was thinking i could just use the stepper motors if the ones im using arnt up to it. So is this not the case ?
Are you saying my power supply is not upto the job because if thats so could i not just swap it out for the 36v one i have ?
On the picture I looked at it says on the terminals 24V, Gnd, so are you sure it can be powered by 36V ? if it can then it might be a good idea to try the other supply.
I agree I have a feeling that those drivers are only OK up to 24V So unless you like magic smoke don't go higher. CliveQuote:
Originally Posted by EddyCurrent
Ok I'm lost now. Are you saying the board I'm using won't take 36v or the drivers that came with the kit won't take 36v
Ok for the sake of clarity I take it you have two setups one purchased with the cnc and the other which is a set of drives and motors and a power supply is this correct. .CliveQuote:
Originally Posted by amxen
Ok I'm lost now. Are you saying the board I'm using won't take 36v or the drivers that came with the kit won't take 36v
Yes that's correct
I was going to make my own so I got all the parts together to make one. Then I found I don't have the time to prototype parts. So I thought I would buy one. . The photos and video are of the one I got form eBay. The link to the aliexpress is a kit of electrical parts I have that for the one I was going to ( May still do) make. But I can use the parts on the other if I need to. Not sure about the sub Bob now thow as I have a dedicated pc with a PP. Hope that's abit more clear. Thanks mick
Mick In the absence of the master's on here (I am sure they will be around in a bit) let's see if you can get your original kit working. Frist alter the vel in Mach to say 1500mm/min and try that. (you have it set for about 2000mm/min).
.
The other kit you have bought is better but not good. You need motors with low inductance. The drives in that kit will accept up to about 48V which is better and you could use them with the power supply from the kit.
Don't get despondent there are plenty of people on here to help. ..Clive
Hi Clive. I know the kit I have is not amazing but it's all I could aford at this time. I'm not too worried about my set up as I have it running ok tbh, just not at the seeds they say it will run.
At the moment I have it set like this 320 - 1000-100. And it runs ok just a bit slow. This is fine for now as I'm just learning. But if I try any higher like say 320-1200-150 then it starts to randomly jam. At 320-1500-200 or higher it will jam all the time. I'm guessing the recommend setting are a sales lie by the eBay seller and not what the electronics are up to.
But I would like to track the fault down so I don't junk what I don't have to when I want it to run faster.
I'M thankful for all and any help I get on here.
Mike Are you saying that your running at 1000mm/min on one axis and slower on the others? ..Clive
No. X nY at 320-1000-100 and Z at 320-700-100
Mike Is that code for steps, vel,acel ?:fox: ..CliveQuote:
Originally Posted by amxen
Quote:
Originally Posted by Clive S
yes Clive the manufacture instructions say to set it to
steps = 320
velocity = 2000
acceleration 200
but if i go anywhere near this it stalls
i have to set it to
steps =320
velocity 1000
acceleration 100
and at this i still get a bit of grinding sound some time.
Ok Mike Unless you change the dip switch setting (on the driver) for the micro steps you don't need to touch that.
That setting is to set up the machine so that when you tell the machine move say 50mm it actually moves 50mm.
.
I would now move the steps to 1/4 which would be 160 by setting K1 and K2 (look the switch position up in the manual) on the driver and then change the Mach3 steps from 320 to 160. (re read EddyCurrent post #5).
.
See how it runs then. Just change one thing at a time. When you say grinding noise, are you running the motors on or off the machine? ..Clive
Hi Guys
I have been watching this thread and can offer no advise regarding the electronics/drive side, but would it not be prudent to disconnect the the ball screws and check to see if the axis are moving freely.
Just a thought.
Mike
I would have said set it to 4 myself but looking at the photo the options seemed to be 1,2,8,16 unless I've read that incorrectly.Quote:
Originally Posted by Clive S
In the video the motor was removed from the machine and just lying on the benchQuote:
Originally Posted by mekanik
I don't have a manual for this board. And I can't find one on line. So I'm not sure where. To set the switches. I'm guessing that k1 and k2 can be on or off. And at the moment they are both set to on? So I need to change this.
if I was to replace this board what would you go for?
All axis run free with the strippers removed with strippers removed
I could maybe use the stepper drivers I have and get a new PP based BOB. Or maybe replace the all in one board with a new all in one board. But what would you go for in each scenario
I could maybe use the stepper drivers I have and get a new PP based BOB. Or maybe replace the all in one board with a new all in one board. But what would you go for in each scenario
Mike Is this the board http://www.aliexpress.com/store/prod...572788008.html what info do you have regarding the settings for the switches K1 and K2 As Eddy says you might have to try half step but we need the settings for the switches first.Quote:
Originally Posted by amxen
You can of course use your other drives but Keep trying this one first. I am having to earn a crust this afternoon but will get back later The supplier must have given you some sort of instruction to set micro settings. ..Clive
Clive, picture 2 here shows the settings.
http://www.mycncuk.com/threads/7871-...1513#post61513
I see from your link Clive that K3 and K4 refer to 'buffering', I was thinking it meant standstill current due to the percentage symbol
I'm pretty sure I got nothing regarding the micro settings. I got one sheet of paper showing how to put the parts together that was unreadable.
So are you okay with what microstepping actually does ?Quote:
Originally Posted by amxen
Is it how many steps it takes the stepper to do 1 revolution of the spindle?
Yes, so a setting of 1 will give you the maximum torque, any higher will give you less torque and the reduction can be dramatic. The downside is you will loose accuracy because the smallest increment of the tool is determined by this value. However this is only true up to a point, the greater stability of the motor means there would be fewer lost steps due to the higher torque so a lower setting may increase accuracy, this sounds like it could be the case with your machine and I think you should set the microstepping to the lowest value that is acceptable to you.Quote:
Originally Posted by amxen
If you set it to 1 then the stepper would have 200 steps per revolution, with a ball screw of 5mm pitch the smallest increment would be 5/200 = 0.025mm
It sounds small but if you zoomed in on diagonal cuts it would give you a 'staircase' effect.
Just remember to also set the appropriate 'steps per' in Mach3 so it moves the correct distance.
Is it how many steps it takes the stepper to do 1 revolution of the spindle?
And this is set on k1 and k2. I'm not sure as I'm not at home but is that a 2 or 3 position switch on the board. ?
I'm going to guess it is a 2 position switch and it is either ON or OFF and you can have a combination of on-on, on-off, or off-on. And this will determine what micro steps it runs at?
Correct, there is a table printed on the PCB showing the options.
It would be with a 1 to 1 relationship but if you had pulleys for example with different diameters, then the ratio of those diameters would come into the equation.Quote:
Originally Posted by amxen
yes it looks like the board has setting of 16.8.2.1 so ill try it set to 2 see if that helps. ill let you know. iv told the seller im not happy with and i would like him to exchange the controller for something thats proven to work or i will open a paypal dispute. i will let you know how i get on
ok here are my findings for today. I changed the switch settings to 2 in the mico stepping (K1 n K2) and the steps per to 80. The motor runs smooth when not attached to the cnc (good i thought sorted ). But as soon as i attach it back to the cnc the motor jams more than before. It has no torque at all i can put my hand on it and it jams. it has not got the power to traverse the axis. i put it back to how it was.
So my thoughts are that the steppers motors are under powered.
But the question
1 will the stepper motors take more power
2 will this board give them more power
3 do i need to replace just the board,? should i get a new all in one board or use the drivers i have from the other kit and just get a BOB that will run these drivers,
4 will the stepper motors from the other kit i have be ok for me to use ?
so many questions
thanks for all the help btw
Wait, give this a go first, if the velocity / accel in Mach3 is set too high the motor will stall, put the setting back to 2, fit the motor to the machine and reduce the velocity and acceleration until you get good torque.
Even though you reduced the velocity it could well be faster than previous.
Here's a quote from another forum;
"The other day I did switch from 1/10th step to 1/2 step. Seems to operate about the same overall - only MUCH faster. That first rapid move at 180 ipm was a bit shocking. I ended up at 108 ipm - the motors quit stalling then. Probably had to do with the 20 tpi lead screws. The mill runs great! I was slotting ).050" deep with a 3/16 end mill in aluminum at at 18 ipm and the machine seemed happy as can be. And a 0.015" climb cut finish pass left an awesome surface finish. Fun stuff!"