Messages

31

General Mach Discussion / New cnc machine running but....

« on: November 09, 2016, 06:18:25 AM »

HEY!  Having a problem tuning my new diy woodworking cnc. I am making a clock just to test out the machine i have made the clock my previous machine so i know what it should look like.

When the machine goes around the outside of the clock to cut it out and make other circular shapes the x motors do a large clunk when the drop down to 0 rpm and then turn the other direction.

I am using:

Mach 3
chinese tb6560
nema 23 steppers
board set at 1/8 chip setting
sorry i am still learning all of the cnc stuff

Here i have a link to describe the problem also my mach settings are at the end of the video.

https://www.youtube.com/watch?v=0OyRO91hfTk

Thanks for any help/advice!

wes

32

General Mach Discussion / Need Help to Figure out PLASMA CNC

« on: October 15, 2016, 03:38:12 AM »

Hello I Am thinking of building a low budget plasma cnc for my garage. I have already built a nice wood cnc but i have a left over stepper motor and a left over 3 axis driver board.

I also own a old plasma cutter so I have the most expensive things.

What i am trying to figure out is how i could operate the plasma on and off switch on the handle with the board i have.

Plasma cutter: Thermal Arc Pak 5XR

3 axis driver board: TB6560

Computer: Windows XP Running Mach 3

I have also attached a link to show everything and a peak at my wood cnc.  https://www.youtube.com/watch?v=ZT9waSaieQY

The information on my tb6560 was on a eBay website that is apparently not existent anymore.

I Am pretty NOOB at this stuff especially the electronics part so if someone could help me figure this part out i think id be good to start building

 

33

Building or Buying a Wood routing table.. Beginnners guide.. / Re: trying to figure out steps per mm

« on: July 19, 2016, 05:49:08 PM »

it was actually the other way . it was 400 steps per mm. Thanks so much for your help!

34

Building or Buying a Wood routing table.. Beginnners guide.. / Re: trying to figure out steps per mm

« on: July 19, 2016, 05:12:00 PM »

Thanks for your quick replies i think im on to something . I have a video here to show you what i actually get when i move the z axis down 10 mm on the DRO



https://www.youtube.com/watch?v=r5UPgpz9q7o

Thanks again for your help it looks though as if im only seeing close to 5 mm when i move it 10 on DRO any ideas?

35

Building or Buying a Wood routing table.. Beginnners guide.. / Re: trying to figure out steps per mm

« on: July 19, 2016, 04:06:49 PM »

I have entered the setting at 200steps per mm , if i get my calipers and move the z axis down 10 mm on mach3 display should that be 10mm of travel on the leadscrew ?

36

Building or Buying a Wood routing table.. Beginnners guide.. / Re: trying to figure out steps per mm

« on: July 19, 2016, 03:53:56 PM »

Where did you get the 1600 im curious

37

Building or Buying a Wood routing table.. Beginnners guide.. / trying to figure out steps per mm

« on: July 19, 2016, 03:39:46 PM »

Trying to figure out my steps per mm Using the Rep Rap Calculator

Here is the link to the NEMA 23 Steppers that i bought as a kit with the cnc controller.

http://www.ebay.ca/itm/3-Axis-3A-Stepper-Controller-Cnc-Kit-Nema23-24V-Psu-For-Milling-Machine-/401075212293?hash=item5d61f21005:g:Hq0AAOSwzJ5XZ8Oz

Here is the link to the leadscrew i have selected

http://www.banggood.com/T8-800mm-Stainless-Steel-Lead-Screw-Set-with-Shaft-coupling-and-Mounting-Support-p-1062920.html

From the above sites i was able to determine my:

Motor Step Angle 1.8
Leadscrew Pitch 2mm

I have the dip switches on my cnc board set to be at 1/8 micro step.

The part that i think im messing up is the pitch preset where i am only guessing that is m8 1.25 mm per rotation.

With the above information i get 800 steps per mm which seems absurd
PLEASE SOMEONE HELP ME if i roatate the rod 1 full revolution it travels 8.1mm

Am i just messing up the calculation???