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Topics - mturneruk

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SmoothStepper USB / SmoothStepper or something else ?
« on: April 27, 2014, 05:08:23 AM »
Hi Guys...

I have recently built an OpenBuilds OX CNC Mill.
I have now had two loads of MACH3 electronics which have not worked, after much frustration and at least 100 hours messing about.

Now have shielded cables all round...
Have homing switches and limit switches on X & Y.

The first lot was a parallel port all in one box 4 drivers HYCNC (Parallel Port does not work on win7 64bit).
The second lot was an HYCNC 125 4L and 4 TB6600 Drivers which i could not get to run without skipping steps continuously.

Are there any issues on the USB smoothstepper for running on Win7 64 Bit? What about the grounding issue - Is that still a problem ?
What drivers should i use with this to ensure that it just works?

I really just to ensure that i don't get a 3rd lot of electronics that don't work, as its hurting my wallet and my sanity!
Do not fancy the ESS if i can help it, as it needs a separate power supply and i suspect another network card in my machine.

Any help much appreciated.
Best Regards

General Mach Discussion / Mach 3 Lock ups...
« on: April 22, 2014, 03:31:26 PM »
Hi Guys...

I have a problem where Mach 3 seems to lock up during a run.
I am trying to cut 100m high letters out of a 6mm sheet of MDF.

The G-code looks fine, and it's not like it's crashing in the same place every time.

What's really weird is that when the cutter is not running and i run it in Mid air, i cannot get Mach3 to crash.
However as soon as its running it seems to lock up at random points during the run.

I have a couple of unshielded limit switch cables in the x axis of my machine and was wondering if it was possible that the cutter was causing interference with the switches -  so i have disconnected them and its still doing it.
(I am waiting on shielded cable to come through).

It's not like the emergency stop is being triggered. Once Mach3 locks up, it's impossible to move the cutting head at all, even after a reset - and you have to shut Mach3 Down and restart.

Photos of my machine on this page:: http://www.machsupport.com/forum/index.php/topic,26997.10.html

Any ideas ?


General Mach Discussion / Machine wont zero after Homing
« on: April 17, 2014, 01:43:49 AM »
Hi Guys

Any help much appreciated.


I have built an Openbuilds OX, 3 axis CNC Mill.
I have installed homeswitches on the x and y axis and added the home switches in ports and pins.
I have setup my table size limits in "Homing/Limits" and i have autozero switched on.
Motors Nema23 - Unknown brand.
TB6600 drivers
HyCNC 125-4L USB Board (Like a smooth stepper).

I used the "Set steps per unit" auto calc thing to set steps per unit for my motors - to move 100mm.
44.52 was the steps per value that made it move the correct distance. Seems low? - but distance moved fairly accurate...
I made velocity 3000, and acceleration 300 - To get a reasonable travel speed.. Is there something else i have to do to config the motors ?

The machine will home, i.e. it will travel until it hits the switches and then reverse until switch untriggered, however when i do this the machine will not zero.
Everytime i press Refall home, the machine homes but the machine and work co-ordiantes seem to decrease by about 3mm (Into the nagative).
So if I am homed - then i zero the work co-ordinates, then home again, the work co-ordinates and machine co-ordinates are decreasing (into negatives) by about 3mm every time i press ref all home.

Anyone got any ideas ?

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