Thanks for the great report, Rob. Good luck with that first paying project. Your idea of suppressing motion on the first motor to reach it's switch sounds like it should work. If I remember right, long years ago there was a fellow in Finland that proposed a yearly contest for the most innovative
Rayh,
the whole gauntry acts as a swivel :-}
It's all made of aluminium sheet 15 mm thick, 30 cm wide and 70 cm
height with two 80x80 beams of 122 cm long. If I remove one of the ball
screws I can move that side a few centimeters without applying too much
force.
I thought of adding a timing
Hi RobThat sounds like it should work since the two motors will not bind against a rigid frame. You're right about those motors jumping whichever direction they please when you apply power. As long as you don't have to worry about loosing steps, both motors could be driven from the same set of
2008 07:51:11 +0100 From: Rob Jansen
[EMAIL PROTECTED] Subject: Re: [Emc-users] Homing using 2 motors per axis
To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=utf-8 Rayh, the whole gauntry acts
as a swivel
Hi RobI've been curious about these dual drive axes for quite a while now. There are several possible mechanical lashups with something like this. It seems to me that in order to allow separate homing of each drive, there would have to be a swivel on one side or the other of the mechanical slide.
I had a similar problem. I solved it by using a toothed timing belt
between each screw, such that both sides were forced to stay in
alignment. That way, I didn't need to worry about misalignment during
either homing or actual milling. I only used one homing switch for the
axis this way.
It
