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Fireball CNC V90 Limits and Speed

Yesterday I performed some testing on my Fireball CNC V90. I started off with each axis pretty much centered, to reduce the risk I crash the machine into it’s hard limits (the physical limits of each axis).

Using the full stepping inches configuration I tried:

G00 X1

to move the X axis (the longest axis) one inch. The motor accelerated and then stalled. This results in a nasty whirring/vibrating sound and no movement. A bit like crunching a gear in a manual transmission car. I found the same for the other two axis.

Next I tried moving the axis at slower speeds by specifying the inches per minute (IPM):

G01 F30 X1
G01 F50 X0
G01 F60 X1

etc. I found that I could achieve the following speeds before the motors stalled:

  • X: 148 IPM
  • Y: 80 IPM
  • Z: 33 IPM

Fireball CNC confirmed that Y will operate slower due to the different forces on the rails.

The next step is to try 1/4 stepping. This will result in a lower speed, but will increase the torque, so it should be possible to get a little bit closer to the theoretical maximum speed.

I also measured the following amount of travel for each axis:

  • X: 17.85 inches
  • Y: 11.7 inches
  • Z: 2.75 inches

Since I received my machine Fireball CNC has increased the Z axis travel slightly.

 Print article This entry was posted by Andy on April 7, 2008 at 9:23 am, and is filed under CNC. Follow any responses to this post through RSS 2.0. Both comments and pings are currently closed.
  • #1 written by Jim
    about 15 years ago

    My fireball v90 machine is bad, it will not cut good, and has not made a real part since I got it, I am sorry I bought it, probotix will not refund me, what a total waste of money, crap, do not buy it or anything from probotix, bad machine, bad company, nasty people. threw away $1000 what a waste!!! it would have been more fun just to burn the money.

  • #2 written by Andy
    about 15 years ago

    Jim – I’m sorry to hear that. I’ve been having a lot of fun with my V90. I made Christmas presents that everyone enjoyed and saved me quite a bit of money (at the expense of time of course!). I’ve been able to make gears, nameplates and more. Note that I have the very first V90 machine so it is missing a couple of refinements that later machines have.

    Can I pass your comments and contact info on to John Hansford the creator of the machine? I’m sure he will be happy to help you solve the problems you are having. I’ve sent you an email so please let me know by replying to it. Thanks. Andy

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