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Type: Posts; User: chrugel

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  1. Thread: Velkommen!

    by chrugel
    Replies
    14
    Views
    508

    Hei alle sammen! Artig å se et norskt sted her...

    Hei alle sammen!
    Artig å se et norskt sted her på CNCZone!

    Jeg syned det er kjempe artig med CNC og lære stadig nye ting!
    Planene er allerede klare for en fjerde akse som jeg holder på å samle...
  2. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    Hi, 74HC and 74LS is ok. If you are in Romania...

    Hi,
    74HC and 74LS is ok.
    If you are in Romania you can use http://www.agesys.ro/ which is a reseller of Elfa. I use Elfa and they have everything. They are not cheap but they got about everything....
  3. Replies
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    975

    Original UHU current limit question

    Hi,
    Ive been doing some small tests with my UHU boards in regards to the current limiter.
    I know for a fact that one of my motors has a stall current of 7 amps at 24V.
    I figured 5 amps current...
  4. Replies
    41
    Views
    5,798

    If you dont need the high current capabilities of...

    If you dont need the high current capabilities of the HP UHU design ahmedrehan you could use the IRF640. This devis has seriously low gate capacitance and should give you the possibility of up to 160...
  5. Replies
    9
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    1,810

    Hi, This is also the case with one of my axes....

    Hi,
    This is also the case with one of my axes. Always error on the forst Homing after power on. After the first one everything seems to be working as expected.
    Have you goeetn this issue solved?
    ...
  6. Replies
    41
    Views
    5,798

    Just be aware that this device has a very high...

    Just be aware that this device has a very high gate capacitance so you could get cross conduction at high voltages since the driver has a fixed delay of 500ns. In the HP UHU design they use a...
  7. Replies
    41
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    5,798

    Hi Ahmed, Really sorry for the late reply. What...

    Hi Ahmed,
    Really sorry for the late reply.
    What i changed was the Snubber circut at the output, replaced the original R C snubber with the configuration used on the HP UHU. I also changed the...
  8. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    The good old UHU design works very well for...

    The good old UHU design works very well for motors up to about 500W so they should preform well i your case I think. I think your encoder are defective. You could try and measure the voltage on the A...
  9. Replies
    10
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    784

    Sounds like a good idea. Am I right if i say...

    Sounds like a good idea.
    Am I right if i say that interferance on the E-Stop input could cause this? If you press your estop and the release it again does the E-stop in EMC stay activated og does it...
  10. Thread: Little Brute

    by chrugel
    Replies
    120
    Views
    4,008

    WOW ,i must say it has happend a lot here while i...

    WOW ,i must say it has happend a lot here while i were sleeping!

    Looks like an interesting Z axis design FandZ, but how are you going to drive it? did not quite understand that. I cant see you...
  11. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    Now that would be the 100.000 $ question. I got...

    Now that would be the 100.000 $ question.
    I got a feeling this encoder is not working as it should. . . .
    It shout be easy to measure the output of the A and B signals with a multimeter.
    Hopefully...
  12. Replies
    10
    Views
    784

    Just the powerbutton. Im running not the latest...

    Just the powerbutton. Im running not the latest ubuntu version, Vesion 8.04 did not works very vell on my computer for some reason. I'm using the live CD with verisn 6.06 Dapper Drake.
    I find it...
  13. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    That would be very stranger when there are a...

    That would be very stranger when there are a black an red wires present dont you think?
    Dont you think this is ferrite, dont know why really but it wont be any problem for the signal since it never...
  14. Replies
    10
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    784

    I am using Axis and I can see the symbol you are...

    I am using Axis and I can see the symbol you are talking about both the Limit symbol and Home symbol. But when the program runns i get non of them, just "STOPPED" is showed in the lower left corner....
  15. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    I'm no encoder expert but in my oppinion that...

    I'm no encoder expert but in my oppinion that should work on the UHU controller. It does not really matter if you dont know the A and B channels as long as you know Vcc and GND. Mixing up the A and B...
  16. Replies
    10
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    784

    Hi, My question that now remains, said in fewer...

    Hi,
    My question that now remains, said in fewer words, is: How can I in axis see what caused the programexecution to stop? It says stopped in the lower left corner?
    Might be a very stupid question...
  17. Thread: Little Brute

    by chrugel
    Replies
    120
    Views
    4,008

    My racking problem is still there but since my Y...

    My racking problem is still there but since my Y and for that matter X axis is center driven i can do simple cuts with very low cuttingforce without problems. My problems first occur at about 10N of...
  18. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    The vertical line going over and over again is...

    The vertical line going over and over again is like it is supposed to be :)
    A going crazy is NOT the way it is supposed to be IF you carefully move the motorshaft back and forth. should be more like...
  19. Thread: Ben's UHU saga

    by chrugel
    Replies
    58
    Views
    6,759

    Do you get the controller up in the terminal...

    Do you get the controller up in the terminal window?
    can you place the controller in analyze mode "A"?

    if you turn the motor by hand with the encoder conected but not the motor wires, does a red...
  20. Thread: Little Brute

    by chrugel
    Replies
    120
    Views
    4,008

    How is it going FandZ? Really looking good!...

    How is it going FandZ?

    Really looking good! Looks like little brute is going to be a solid little machine! Now I finally got my up and running and I soon discovered that it was not sturdy enougt...
  21. Replies
    10
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    784

    Thank you Alan, I have just used the stepconf...

    Thank you Alan,
    I have just used the stepconf wizard but I'll take a look at the ini file as soon as I get home.
    I think i might not have the HOME_OFFSET = -0.1 set in my ini file. Logically i...
  22. Replies
    15
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    662

    Its Alive!!

    Well we got movement!
    Yesterday i got all axes up and running in EMC2, I could jog all axes and Home them. The initial EMC AXIS letters have been cut out in air several times.

    I got som...
  23. Replies
    14
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    17,715

    Success, at least a partial one! I finally got...

    Success, at least a partial one!
    I finally got my new UHU controller chips today and got arround to test the thing. It worked without problems at 140V. When testing i realized that this gives way to...
  24. Replies
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    5,798

    H.O is very right here, the gate diode is to...

    H.O is very right here, the gate diode is to create faster turn off times since the discharging of the internal gate capacitance of the mosfet is done faster.
    The original 1n4007 diodes here is way...
  25. Replies
    10
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    784

    Programexecution stopps

    Hi,
    I just go my CNC router up and running.:D I have used the stepconf wizard to set up EMC2 and now i can jog all axes, and sometimes execute a g-code program.
    Here comes the strange stuff; When I...
  26. Replies
    1
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    1,320

    The reset switch

    Hi,
    I have two questions regarding the resetswitch on the UHU controller:

    1. question: Since my controllers is mounted inside a box i want to have the resetswitch on the front panel, can i wire...
  27. Replies
    17
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    3,164

    0,35mm is not little when it comes to press...

    0,35mm is not little when it comes to press fitting!
    I had a pulley that was a little bit to big and what i did was to shimis it with thin metal plates and then press fitt it. I believe this was in...
  28. Replies
    14
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    17,715

    Thank you for the respons kreutz! What is the...

    Thank you for the respons kreutz!
    What is the purpose of the 100k resistors from the output to Vmotor?

    Why do you recomend replacing the whole gatenetwork with one resistor?
    Isn't the purpose of...
  29. Replies
    14
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    17,715

    This will be my next move: Replace the 1n4007...

    This will be my next move:

    Replace the 1n4007 diodes in the gate network with HER105.

    This beacase the HER105 is a super fast diode compared to the slow 1n4007, trr of 50nS compared to 2000nS...
  30. Replies
    14
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    17,715

    It's been quite a while since i had this at...

    It's been quite a while since i had this at school so please be patient with me! :)
    Isn't the function of the components in the RC or RLC filter at the output to limit the dv/dt going to the motor?...
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