Problem fixed..
I did a mod to the board to gain controll over the "idle mode" (sync pin on
the chip). Now the axis sweeps from side to side without loosing steps or
making strange sounds when starting from idle...
Made an external switch, so if I need to power down the motors, I can just
flick the switch anyway, and it will idle all the axis at the same time...
not that I think I need it any more... (-:
Best Regards
Kim Mortensen
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of BRIAN GLACKIN
Sent: 2. september 2008 19:45
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] EMC and HobbyCNC
Been lurking here a long time and have said little being a novice to all
things machining. Having said that, I have the HobbyCNC board as well and
the default settings appear to need tweaking for this board. I found that I
would always miss steps on rapid moves on all axes. My router plowed
through several pieces as a result of this.
Unfortunately, I have the unit torn down right now for a shop rework.
Once that is done, I intend to get this running properly and work through
the problem and not simply avoid rapids (I would edit all G0 moves to a G1).
I will report any successes/problems I have.
Brian
On 9/2/08, John Thornton <[EMAIL PROTECTED]> wrote:
The timing to the board will not affect the boards performace or how the
motors run.
If the step timing is too fast the board might misses steps if the
direction timing is
too fast the board might miss a direction change. If this is the problem
then increase
the timing until those problems go away. The information on hobbycnc is
sketchy at
best. If you find a setting that is better please let me know and I'll
update the wiki
page. If it runs fine and changes direction fine but the motor is noisy
at mid range
that is the hobbycnc board doing that. Cheap drives have mid range
resonance
problems.
Please explain what "a tad too harsh" means.
John
On 1 Sep 2008 at 19:38, Kim Mortensen wrote:
> Hi All,
>
> Im new to this list, but have been directed here as some of you may
> have answers to my question.
>
> Does anyone have experience with running EMC2 and HobbyCNC boards..
> and have some settings they can recommend for driving the board
> correctly.
>
> Currently I have the following settings in EMC:
> Step Time: 2000
> Step Space: 2000
> Direction Hold: 2000
> Direction Setup: 2000
>
> But it seems that the settings are a tad too harsh for the board.
>
> Best Regards
> Kim Mortensen - Denmark.
>
>
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