Topics

1

PoKeys / Setup Edge finder with pokeys

« on: January 27, 2014, 02:30:53 AM »

Hi there,

My conversion of my Proxxon MF70 is nearly complete.
Now I'm looking at setting up an edge finder so I can zero my machine to the material I want to process.
I've been searching this site and others on how to do this with Pokeys, but can't find anything on this subject.
I did find a pin setting, "probe" , this is probably used in digitizing an object, but can I use this pinsetting for edge finding as well?
I also read that you need a VB script for Edge finding, but this is probably a question I need to ask in a different forum. New to VB scripts...
Any help and advise/examples on how to do this is very welcome.
Hope that someone can give me push in the right direction!

Thanks in advance!!

Greetz,

Tom


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2

PoKeys / axis setup Poxxon MF70

« on: December 23, 2013, 04:54:02 PM »

Hi guys,

I am in the pocess of converting my MF70 micro mill to CNC.
I've got all the steppermotors wired up and working.
However the leadscrew for the Y axis is counter clockwise, I've read all through the manuals of both pokeys and mach3. Mach3 manual isn't much help since it only describes how to setup the LPT ports&pins.
So how can I reverse my y axis in MACH3?? I even did a search on the forum here.
I came across a post, about a mf70 conversion as well, Had the same problem, but did not find any solution in the post, except for the comment to switch the stepper motor wires around.
Is this the only possibility to reverse an axis diection or are there other ways to go about it.
I once tried to reverse my x axis in the homing and limit switch config screen. It only switch motion direct during homing sequence, and by the way almost went through the stop. Thank you E STOP!!

So my question is: what do I need to do to reverse my Y axis?

Thanks in advance for any help and off course happy holidays!!!!

3

PoKeys / PoStep 25-32 led status red

« on: December 15, 2013, 07:44:51 PM »

Hi Matevz,

I finished the conversion of my Proxxon MF70, now I'm in the process of wiring everything up and re-checking if everything still works.
Did the motor calbration, worked fine till a moment ago.

On one of my PoSteps the led status light is continuously red now after I accidentally hit the top bracket while I was manually jogging the Z-axis. I understand that the red light indicates there is a overtemperature or overcurrent.
I was checking if my top limit switch was working, it was. But then I hit the wrong jog key and it ran into the top bracket and the redlight came on.
I powered everthing down and let things cool for a bit, then powered everthing up again, immediately the red light came on. Other axis's working ok.
Is there a way I can see what the actual error is, I already tried swithing the PoStep, but that specific board lights up red immediately.
Is it a safe assumtion that I destroyed the Postep board in question or is it still rescueable? I already tried the cooldown as it says in the usermanual.


Greetz,

Tom

4

PoKeys / What wire goes where, and what's this for???? Pokeys56U v.s. PoStep 25-32

« on: December 04, 2013, 02:42:40 PM »

Hi guys(Girls?),

Recently bought a Pokeys 56U cards with 3 Postep 25-32 cards to convert my Proxxon MF70 mini mill to CNC, plan to use it with Mach3 (for now free version).

I am new to the world of CNC and after reading through many posts here and on CNCzone, I decided to go with the USOVO conversion kit (no do not want to use uni1500 card with printer cable) and use Pokeys(USB) to drive it.

Now the last couple of weeks I have been reading through all the documentation on Pokeys pulse engine and PoStep (multiple times actually), so I'm aware of what the documentation says, don't understand it all yet, but that will come.
I am not an electrician and have very basic knowledge of it all.
Read up on what a pull up resistor is for and what a safety charge pump is supposed tot do!

But...
I have a couple of questions I need answered, in order for me to hook up the PoStep boards to my Pokeys 56U card correctly.

1: In the PoStep manual the 10 pins on the postep board are explained. Correct me if I'm wrong pin 3 on the 10 pin connecctor of the postep board is connected to pin 38 (x-axis) on the Pokeys card.
    Pin 5 (PoStep) is connected to pin 46 (Pokeys) for the X-axis again.
    But were do I connect pin 1(PoStep) to?
    And where do I connect pin 7 (Postep) to?
    As for pins 2,4,6,8,10 (GND) do I need to connect these to the GND pins on the Pokeys 56U, and does it matter which one?

2. Wtih respect to the pull up resistor circuit (3.3V) for pins 48 and 49 (Pokeys 56U), do I need to connect these using a star topology (same as with the power from the PoPower 24-100) as well?

3. in the pokeys pulse engine documentation for the for the limit/home switches, I need to use a pull up circuit as well.
    Do I need to use the 3.3V pin for that or do I need to use the 5V pin for this? It isn't clear to me in the documentation on it.

4. Pin 53 (PoKeys) is the safety charge pump output, but where do I need to connect this to? PoStep??

5. What is the recommendation on which "thickness" of wires (thicker means less resistance, right?), I need to use to connect the PoKeys to the PoStep card. Can I use regular 10 leads flatcable in combination with female 10 pin connector?

Hope someone/anyone (NeoTo/Matevž?) can help me with these questions.
A detailed drawing of what goes where would be even better!!  

Greetz,

Tom