MiniCNC Z-DQ setup

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24 Apr 2019 18:08 #131780 by drumanart
MiniCNC Z-DQ setup was created by drumanart
Hello.
I purchased a mini CNC machine (attached photo) and as a beginner I need some help in setting up the EMC2 software.

The machine was delivered without any instruction or data-sheet and the only info I found is at the seller website:

Stepping motor type 57 two-phase 1.8A
Spindle motor Brand new 230w dc motor 11000PRM/Min

I went through the setup wizard and I'm able to move the x,y & z axis with the test program but I really don't know weather my set-up is correct.

Strange is that the security switches of the machine have no effect (I tried the two connection options) and also the panic-button want react.

Thanks a lot for helping me

kindly Martin


I set up the stepping motors as 1,8ยบ (200 steps per revolution)

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24 Apr 2019 19:36 #131790 by andypugh
Replied by andypugh on topic MiniCNC Z-DQ setup
Does the machine work as expected? If it does, then the setup is probably correct.

What do you mean by "security switches"?

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25 Apr 2019 19:16 #131875 by drumanart
Replied by drumanart on topic MiniCNC Z-DQ setup
The machine has 3 micro switches that limit the X, Y and Z axis to avoid that the stepper crashes with the frame or table.

Observations:
The panic-button doesn't stop the machine (quit important or not?).

Does any-body setup this specific router: MiniCNC Z-DQ?

Stepping motor type 57 two-phase 1.8A
Spindle motor Brand new 230w dc motor 11000PRM/Min

thanks

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25 Apr 2019 19:42 - 25 Apr 2019 19:44 #131878 by Todd Zuercher
Replied by Todd Zuercher on topic MiniCNC Z-DQ setup
How is your "Panic Button" connected to the machine and Linuxcnc?

A proper E-stop switch circuit should disable the machine without requiring Linuxcnc's reaction to its change in status. But Linuxcnc should be informed of it's status and ideally also be able to trigger it. There is more than one way to do this acceptably, and a nearly infinite variety of almost sort of ways.

But all of that has much more to do with how it is physically set up, than anything within Linuxcnc and it's configurations.
Last edit: 25 Apr 2019 19:44 by Todd Zuercher.

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26 Apr 2019 17:48 #132007 by drumanart
Replied by drumanart on topic MiniCNC Z-DQ setup
Yes I agree, the E-stop should work independent of the software attached to the router. In any case I can stop the machine using the EMC2 software. I will open the router to investigate the failure of the E-button.

But as I mentioned above my main-problem is that I don't have enough information about the stepper-motors.
The seller describes it as: 57 two-phase 1.8A stepper-motor.

Here is the entire description of the machine from the web-site:

Effective working travel 300(X)mm*200(Y)mm*45(Z)mm
Shape dimension 520x400*370mm
Max.workpiece dimension 300mm*200mm<60mm
Work table dimension 440mm*240mm
Frame materials aluminum alloy 6063 and 6061
Leadscrew 1204 ballscew-screw
Driving units X axis 1204 ballscrew-screw
Y axis 1204 ballscrew-screw
Z axis 1204 ballscrew--screw
Sliding units X axis Dia.16mm chrome plate shafts
Y axis Dia.20mm chrome plate shafts
Z axis Dia.12mm chrome plate shafts
Stepping motor type 57 two-phase 1.8A
Spindle motor Brand new 230w dc motor 11000PRM/Min
Principal axis collet ER11/3.175 mm
Repeat accuracy 0.05mm
Spindle precision radial beat acuities 0.03 mm
Control unit triaxial one-piece drive + ring variable power + PWM speed
Carving Instructions G code/TAB files/nc file/NCC files
Communication interface through parallel connection with computer
Software environment Windows xp
Maximum speed 0-4000mm/min
Carving speed 0-2500mm/min (different materials differ)
Machine weight
22KG v

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26 Apr 2019 18:46 #132011 by Todd Zuercher
Replied by Todd Zuercher on topic MiniCNC Z-DQ setup
No, you don't have much information. Fortunately for a stepper motor system, there really isn't much to know. It looks like you have most of the important stuff.

Assuming since you bought a per-assembled machine, that the motors, drives, and power supply are properly sized and configured for each other. There isn't much else to know. The only other info you could ask for would be minimum step space timings. But they are only really useful when pushing the speed limits of your setup and or using very fine micro-stepping. Generally it is best to set them to a generous number that should be safe with most any drive (10000 is usually a good number) The "type 57" probably just means that they are NEMA 23 steppers.

You were told that the screws are 1204, which would be a 4mm/rev screw so your steps/mm would be 50 (or 1270/inch) or if the drives are using micro stepping, some multiple of that. (they most likely are)

Figuring out your limit switches and other inputs is easy. Simply start Linuxcnc, open HalShow and using the watch tab watch all of the inputs on your parallel port while toggling all the limit switches and your e-stop button, to see which ones are connected to what pins. Your e-stop button may also require a signal from an output pin to work correctly. You will need to look what is there to find out.

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27 Apr 2019 07:16 #132069 by drumanart
Replied by drumanart on topic MiniCNC Z-DQ setup
thanks very much for the helpful information

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