[Emc-users] Touch off / G92 headaches

I know this is probably my own fault for not having limit and home switches (yet) But I keep getting headaches from the Axis behavior of the touch off function in Axis. When I move my zero position finder and then try to do a touch off with 4mm to get the home coordinate, suddenly the OK button in

Re: [Emc-users] EMC Fest

> > > http://linuxcnc.org/compile_farm/festcam.shtml > HUH! Bunch of pikers - where the heck are you? All I see are > empty chairs! > > Jon Agree, it's only 2 at night and already everyone has gone of to bed ? :-) Think this is good though, you need to be fully awake when operating these power

Re: [Emc-users] E-stop Surprise

I agree with Jon: You really HAVE to have a hardware E-stop! > > The business with the pointer focus on the GUI is pretty > dangerous, and I run into it all the time. 'In the Beginning' I just used the E-Stop input pin from the HAL, but I was wondering if this is safe enough so I now added a 'r

Re: [Emc-users] Wax

Kirk, I have some stuff called "Spann-Folie" in German. I bought this from Sartorius in Germany. I friend of me used it also to create round disks of a few milimeters thick on his lathe. The label on the packaging tells me it's called Mitee-Grip

Re: [Emc-users] E-stop Surprise

> Wow - I guess I should be proud of myself that I had a physical estop > button > and a machine kill switch designed in while things were still on the bench! Yep, there should be an easy way to kill the power to the machine. And it should be in reach of your free arm while the other one is being

Re: [Emc-users] Encoder with 5 000 000 pulses/rev

Aram, i talk to company that manufacture encoder with 5 000 000 pulses per rev. > the problem is that that encoder has MAXIMUM rpm less than 200 rpm!!! > so that encoder can be speen faster than 200 rpm because frequences not > enogh to keep so much pulses. > if you want speen faster get lower re

Re: [Emc-users] Thread Milling

> > Is tapping obsolete? > > http://www.emuge.com/carbide_thread/ > Nope, tapping is still useful, these tools need space (try making a 2 mm thread this way - the tool is larger). But this is really useful, there are different tools. Threading mills like the one shown in the picture give a fixed p

[Emc-users] How does EMC build bicycles / Re: Scale and Rotate

> How does EMC2 build bicycles? > > John Easy, just write G-code to mill a mold, apply carbon cloth and epoxy resin in the mold, inser a tube (a bike's inner tube) and bolt the mold together. Then apply pressure to the inner tube and let the epoxy harden. This is how I make bikes. Until now the

Re: [Emc-users] segmentation fault

I'm building a little cnc router with EMC2 as the > controller software running with Xylotek steppers and > everything works fine but when i try to reboot or > shutdown ubuntu it stops with a "segmentation fault" > error. This only happens when i run EMC2, if i run any > other program from ubuntu e

Re: [Emc-users] .deb of CVS?

Alex, On Thu, 2008-05-15 at 10:13 +0300, Alex Joni wrote: > Hi Rob, > > updates which you get automagically won't screw your install. > We only provide automatic updates for the same release branch of emc2 (so if > you have emc2.2.2 you'

[Emc-users] .deb of CVS?

Matt, My purpose is to be able to have "easy to install" updates or hot fixes, > in between released versions if required, without > emc2-dev/CVS/run-in-place. > Good question, up to now I just waited for a new LiveCD. I think the answer is on: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Install

Re: [Emc-users] newb question: coordinate spaces and setup

> > It makes me wish I had a nice granite surface plate, and height > gauge. I used to wonder what people did with those, but lately I've been > finding lot of uses for them. I've got a friend who makes carbon disc wheels for bicycles. He uses one to check if the rim is perfectly round and flat.

Re: [Emc-users] newb question: coordinate spaces and setup

Gary, > I think this doesn't even have to be mounted. It could simply be a little > device you place on the table whenever needed, though it wouldn't be quite > as fast as a prox switch. I just found this while poking around the net: > > > http://www.industrialhobbies.com/howto/production_notes/h

[Emc-users] newb question: coordinate spaces and setup

Robert, Being new to g-code and cnc I've been trying to learn the best way to > think about the coordinate spaces and offsets etc (for a cnc mill). > > I'm thinking I should use a **fixture** plate with alignment pins etc to > mount to the table. Some kind of pallet plate to hold the work > (plugs

[Emc-users] European EMC event & users

I'd love to have a European event. Preferably in my workshop, but then I'd first need to by a 2nd hand machine to retrofit :-) Maybe 2009 or 2010. Meanwhile It would be interesting where the EMC users in The Netherlands and Europe are located. Are there any other EMC users in the Netherlands (I am

Re: [Emc-users] EMC list troubles, and thanks, Gene Heskett!

Gary, I also have problems with the mail servers (from sourceforge that is). For some reason, most of my mails I write through Thunderbird arrive with a normal delay but last Sunday I wrote an email (Re on "How do I calculate leadscrew push/pull forces?" but that mail only arrived 2 days later

Re: [Emc-users] Homing using 2 motors per axis

Clint, home with the motors on. My machine's motors are not strong enough to hurt the machine when they run into the stops so I usually just crash the axis then home... Oh ya, stepper motors... This method is brutal but effective. Brute and destructive on my machine ... It happened once,

Re: [Emc-users] Homing using 2 motors per axis

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

[Emc-users] Homing using 2 motors per axis

Gentlemen, My milling machine uses 2 ball screw spindles with separate motors (and separate microstep drivers) to move the Y-axis portal which is 1.2 meter wide. To do accurate homing, each axis should have its own homing switch and the motors should be controlled using different I/O signals.

Re: [Emc-users] Stepper motor and driver selection

Aaron, > The gantry weighs about 70Kg and I have 16mm lead screws with > 4mm pitch. Could some one tell me what specs I need so i can look out for > stuff on ebay UK. > I have 6.4 Nm (~ 900 oz inch) motors, my gantry weighs about 80-90 Kg and 16mm lead screws with 5mm pitch. The motors are w

Re: [Emc-users] Stepper motor and driver selection

Aaron, > The gantry weighs about 70Kg and I have 16mm lead screws with > 4mm pitch. Could some one tell me what specs I need so i can look out for > stuff on ebay UK. > I have 6.4 Nm (~ 900 oz inch) motors, my gantry weighs about 80-90 Kg and 16mm lead screws with 5mm pitch. The motors are

Re: [Emc-users] home-mad CNC machine project.

Sean, The stepper driver looks OK at a first glance but I did not have a detailed look at the schematics. It looks to be a full-step driver which is nice since full step drivers tend to have a higher torque than microstep ones. But I would stay away from the easy to build desktop thingy from

Re: [Emc-users] step type... which one?

What I meant to say is that you do need motor drivers, the outputs of the parport will not let you draw any current (that is of use for stepper motors). You can draw 10, if you're lucky even 25, mA from the parport directly so to control the stepper motors you will need a driver. Why does every

Re: [Emc-users] step type... which one?

Jim, > with these motors im not looking for step direction, i want to use > stepgen to switch the 4 coils, thats why I'll use a higher step mode, > like 5 or 6. I was thinkin about just usin NPN transistors from the > parport to switch the coils. if i end up killin the parport by not > usin o

Re: [Emc-users] step type... which one?

Jim Coleman wrote: > I've got 3 little steppers that i want to use, they're 5 wire and i > believe bipolar? if anyone knows where to find datasheets for teac > 14769070-30 motors from old 5 1/4 floppy drives, i'd sure like to get > a copy. i know the motor is tiny, i'm only using it for a toy,

Re: [Emc-users] Updated web page

Gene, Just a dir listing, I haven't written a page yet. I think I started the other way around. I've got a page but no photo's yet - At the end of the day I never find (ehh.. take) time to make some photos but today will hopefully be different. The machine is working, spindle is attached and

Re: [Emc-users] Stepper torque measurement article

Aram, measuring torque on an AC servos is definitely possible. It is not as simple as measuring current but this does give some feedback. I don't think that the current used by the servo drivers is a measure but you try Stan's setup that way. There are servo drivers with force-feedback but I an

Re: [Emc-users] A axis following errors

Fred, coil winder ... then indeed you want these multiple revs/s I agree with Steve, this is a cool application. His remarks sound usefull. But then, should stepconf not prevent us to do this? I configured my system using stepconf and it will just not allow me to increase the speed above a cert

Re: [Emc-users] A axis following errors

Fred, as I understood the stepconf wizzard is a brand-new feature in version 2.2.2 I also have similar problems as you are seening with the A-axis on XYZ axes: Configuration in stepconf gives me reproducible results, the machine is 1x2 meters and the whole bridge (moving along X-axes) is about 6

[Emc-users] Speed issue with EMC

My machine is set to to amax. speed of 4800 mm/min (~ 190 inch/min) and an acceleration of 9600 mm/min. But somehow, during milling I reach only speeds of up to 600 mm/min when doing small steps in the program. The thing is controlled with an older PC I still had standing in a corner - don't kn

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