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Topics - marky68

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1
SmoothStepper USB / Breakout board choices with smooth stepper
« on: September 16, 2019, 05:34:27 AM »
Hi
I'm fairly new to the hardware side of Hobby CNC work, although I’ve been programming in industry for over 10 years on 3/4/5 axis large woodworking routers.

The machine I've bought has a cheap chinese break out board with very few inputs outputs. Here is the spec,


Approximately 1mtr x 1mtr cutting area with 150mm Z clearence, 3 Axis
2.2kw Chinese water cooled spindle
4PC Nema34 Stepper Motor 965oz.in 5.6A bipolar Model 86BYGH 7.7N.M113mm 4wires 34HS9456 Step Angle 1.8, Rate Voltage 5.6, Rate Current 2.13A, Phase resistance 0.35,Phase Inductance 4.1mH
4 x Stepper motor drivers DM860A, PEAK 7.8A , Set to 3.0 RMS Peak 4.2A and 2000 microstep resolution
4x Power Supply  350W-60VDC
Cheap chinese HY-JK02-M 5-axis interface board. ( I'm not enthused with the board now I understand a little bit more about them and at £10 cost it seems penny pinching to run an expensive machine with one)
16mm dia 16mm pitch 4 start thread lead screws on all axis
Kernal speed at 25000 Hz



I’m looking at your Ess smoother stepper as I wish to use a newer PC with windows 10 which I prefer and already have a spare of and have heard very good things about using one.

With regards to a bob, I want a decent one with plenty of connections for inputs and outputs. I want to control spindle on/off and also the RPM, The usual E stop, ideally pump on/off , a probe, limit and homing switches as well as all the axis XYZA. Feed speed control via remote hand controller.

I like the idea of going to mach4 too....

I have my  my eye on a few here but I presume the USB type will now work with the your ESS smooth stepper if it requires parallel port connection to a bob?

https://www.ebay.co.uk/itm/3-axis-mach4-board-interface-usb-cnc-motion-control-card-2000khz/303252148651?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

https://www.ebay.co.uk/itm/CNC-200-KHz-4-Axis-USB-Mach3-Motion-Control-Card-Breakout-Interface-Board/123698623045?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

Also looked at these,

Spec here
http://www.spark-concepts.com/cnc-xpro-controller-v3/

Now updated with this one, again doesn't mention MAch3/4

http://www.spark-concepts.com/cnc-xpro-v4-controller/



I also want a hand controller that I can control feed and spindle speed with a rotary dial/knob. I think this one will cover that.

https://www.makers-hut.com/product/mach3-4-axis-wireless-electronic-handwheel-manual-controller-mpg-usb-handle/


Any help and advice you can offer with regards to a good set up of smooth stepper and control board based on what I have and wish to upgrade will be very much appreciated,


Mark






2
Hi could I have some advice on my new to me but used CNC router.

I'm very new to Mach3 but have been programming woodworking Cnc's for about 10 years.

Here's the spec and the question,

My machine is approximately 1mtr x 1mtr cutting area with 150mm Z clearence, 3 Axis
2.2kw Chinese water cooled spindle
4 x Nema 34 stepper motor 878 oz.in bipolar Model 34HST9805-37B2 Step Angle 1.8, Rate Voltage 6.4, Rate Current 2A, Phase resistance 3.2,Phase Inductance 15mH
4 x Stepper motor drivers DM860A, PEAK 7.8A , Set to 3.0 RMS Peak 4.2A and 2000 microstep resolution
4x Power Supply  200W-60VDC
Cheap chinese HY-JK02-M 5-axis interface board. ( I'm not enthused with the board now I understand a little bit more about them and at £10 cost it seems penny pinching to run an expensive machine with one)
16mm dia 16mm pitch 4 start thread lead screws on all axis


My Mach3 motor settings are the same for for all three motors

Steps per = 125
Velocity = 2000 mm/min
Acceleration =650 mm/sec
Step Pulse =2
Dir Pulse =2


Kernal speed at 25000 Hz

All that sounds like I know what I'm talking about but I don't :)

My issue is the axis speed only been at 2000mm, I would like to get to at least 5000 or slightly higher if possible.

I've been informed that it should be possible with the current setup but when I increased just the velocity I got some stalling on the X axis when jogging around.

I've watched many videos and read all sorts of info and it seems motor tuning is an art as well as a science and becuase it's a reflection of the sum of the parts it can differ for everyone.

From what I've gleaned I maybe able to increase the steps per to 200 as that is what my motors are rated at and also that my stepper motor drivers could have been much bigger voltage which would also improve things but I don't how this works, oh and less microsteps?

If anyone can advise with explanations so i can get my head around how it is worked out that would be great thank you..  ;D


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