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Hello dear CNC-Zone!

It has been a long time since I logged me the last time in here...
First I have to thank the great community here, which gave me a lot of knowledge when I designed my...

Hello

I have recently bought an G540 (rev. 8) from an eBay reseller. First I am reall impressed how much torque it can give with my 4.2A Stepper-Motors.
I power it with 48V 10A (regulated).
Till...

hello I have exacly the same issue here. My VFD supplies 5V but I cant get anything higher than 3V out of the gecko. even tried many different duty cycle settings with no success. The strange thing...

Hey Thanks for taking a look into the manual! Yes some paramters are quite confusing. But it is stated that paramter 18 overrwrites the value from the maxiumum output frequency. This parameter is...

hello

thanks for you help so far! Resetting the VFD and setting these parameters again did not change anything - still the same at 184Hz (current jumps to 7A from 4A)
I have no Idea what I could...

ok I set the minimum frequency to 80Hz. The Maximum output frequency has 120Hz limit int the properties, so I cant set this one to 400Hz. But this value was already overwritten by another property...

Hello

I am currently building a cnc router table. Everything is working fine so far... steppers, mechanics, ball-screws etc.
the only thing that makes me lots of trouble is my spindle.
It is not...

Hello

I need to make a 3D Model of an Archtop guitar in Rhino3D 4.0
I have already tried it with the function "Fillarea" but it does not fit proper to the splines (esspecially to the outline...

thanks for your suggestions!

Now I am going to think about a box like structure on the gantry-sides. Maybe I choose 10mm thick AL and add AL-extrusions on the outside

Something completely...

greez all cnc enthusiasts!

finally a picked up my work again...

I was a little dismotivated since my last post - I am not happy with my design and I found out that there are many minor big...

thx boomslang!
I did already try to simulate the flex - but solidworks stikes on meshing the model for deformation simulation. (does anyone from you know how I can avoid that?).
At the moment the...

time was rare...

but now it is here!
The new updated optimized gantry design.

-The cutting forces in X-direction will now be a lot better asorbed.
-added 33x30x33 U-Steel profile for more...

yeah thiere machines are looking PRETTY amazing!
But I also think that it uses a R&P on the X and Y axis - maybe a ballscrew on the other axis in that head.
These machines are about 6mx4m and with...

so first I have to excuse me for my strange word choice -
I meant "redicoulus" with the meaning of the resolution compared to my needs.
Anyway I didnt meant that in an condescending way and I...

what do you think - is it better to put the ballscrew on the outside?
In my mind it will make it more easy to protect it from dust , but are there any other advantages?

At the moment I am...

Thank you for the link. I did already stumbled across them a while ago- but I think their R&P systems are some kind redicoullus.
Their real resolution is 0.13mm per full step - and I never trust...

here is the stepper:
eBay Österreich: Stepmotor Schrittmotor 4,2A 3Nm CNC Fräse Fräsmaschine (Artikel 270712289529 endet 08.03.11 13:41:39 MEZ)
It is in german at all, but the graph speaks for its...

so here is the new gantry design:

http://maxmods.at/images/privat/CNCv1/CNC/Renderings/CNCv1/newgantry/sideview_beta.JPG
...

I think I will use BZT steppers (german brand). I know they are not produced by themselves, but I think they will not sell crap when thay have to take real 2 year warranty.
At bipolar prallel they...

@louieatienza
I dont know how you calculated that RPM - but with my calculation I come to 960rpm at 80mm/s jog 990rpm is the maximum for resonance (based on the nookindustires calculator). With 2:1...

yes- I did already noticed that the lower Y 120x30 profile takes the most force in X direction. But the sloped gantry shape doesnt allow that I change the orientation of the lower and upper extrusion...

so here is a little update:
I designed the cover for the timing belts on the X axis.
Its going to be a 30mm MDF custom milled to fit with that machine.
...

Ok - so the flexible coupling does just smooth down the screws rotatioan to keep the steppers bearings longer up? But the screw is already mounted in an angular contact bearing before the stepper. So...

thanks for your replys! You really let me think about by choose on the timing belts. I already thought about direct drive to ball screw - but I was very unhappy, that I will never be able to change...

First I have to thank the great community here in the zone!
You helped me a lot. I started with nearly zero knowledge about cnc-buliding one year ago, reading through tons of treads here and I...

yeah your spindle really have NSK bearings - but how many?
Your spindles have only ER11 collets.
How much weight do they have?

of course you say you spindles are great:confused: it would be...

Yes I know the torque will really suffer under my 2:1 reduction.

To your example:
I really dont believe that microstepping is something to trust on (for resolution increase) In my mind...

thanks

So in my case I would need pretty high rpm for jogging because of my 2:1 reduction.
In these torque diagramms the x is pps that are Pulses Per Second - right?
so at 200pps the stepper...

Ok the stepper you suggested me has really only 2.8mH but I accidentally looked up for the KL23H284-35-4B - that model is claimed to be perfect for the G540 but it really has the 4.1mH so it must run...

Thank you for your reply!
Yes I have already seen that model.
So with 3.5 A its on G540´s current maximium but it has a phase inductance of 4.1mH - which means by the calculation on the geckdrive...