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331  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: June 07, 2012, 03:09:21 AM
Hood,

It was in your wee lathe topic, I think, that I asked you about how you implement Estop in your control. You said that Estop was cutting power to your drives. This is how I want to do this on this one, but I am a bit confused. If the servo drive outputs a fault signal I want it to trigger the Estop sequence which in turn will shut the drive off and depending on the wiring (fault line active low or high) this will either mean that I won't be able to get out of this state or it will get powered up right after it powers off. Question is how do you do this?

Dan
332  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: June 07, 2012, 02:50:49 AM
The shape is too odd to try and bend the edge. And even if I wanted to I had to order new ones cut anyway (significantly wider to allow for the bend) so getting them cut from a thicker material in the first place is cheaper, faster and easier Wink

Dan
333  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: June 06, 2012, 02:26:53 PM
Thanks Smiley
Tried mounting the monitor and found that the door carrying arms are a bit weak. Their section is 12x3mm and there are four of them. I think I will replace them. Will get them cut from a 5mm instead and may also increase the width to around 15mm.

By the way, the picture above doesn't show the door fully opened and makes it look like part of the cabinet is covered. When fully opened it is almost in the same line with the cabinet edge and you get full access to the cabinet interior.

Dan
334  General CNC Chat / Show"N"Tell ( Your Machines) / Re: 9x20 Chinese Lathe Conversion on: June 06, 2012, 08:14:22 AM
Been quite a while since the last update. Was a huge delay with the sheet metal parts. Eventually I got them and made some progress though Smiley

This is the cabinet assembled after welding and sanding:


And showing how the door opens:


I made the door open this way for troubleshooting convenience, so I can see the monitor at all times.

Working on the wiring now. And added some of the sheet metal parts to the lathe also. Will take some photos later.

Dan
335  General CNC Chat / Show"N"Tell ( Your Machines) / Re: The Laser Project. on: May 23, 2012, 12:51:11 PM
Ah... so I guess it explains the video then.

Dan
336  General CNC Chat / Show"N"Tell ( Your Machines) / Re: The Laser Project. on: May 23, 2012, 03:35:28 AM
Can't find this now, but here is a similar one:

http://www.youtube.com/watch?v=e9BvPeAmuvc

May be I was wrong about the 80W, but it's still way lower than we thought.

Dan
337  General CNC Chat / Show"N"Tell ( Your Machines) / Re: The Laser Project. on: May 23, 2012, 03:28:28 AM
Tweakie,

I seem to remember I saw some manufacturer of small CNC CO2 laser machines which claimed they cut metal (SS if I recall) up to 1mm with something like 80W. They had a video as well. I'll see if I can find the link.

Dan
338  Third party software and hardware support forums. / PoKeys / Re: Pokeys tests on: May 10, 2012, 08:32:51 AM
Yeah... Sad was hoping to hear that you had a way of doing this inside Mach.

Dan
339  Third party software and hardware support forums. / PoKeys / Re: Pokeys tests on: May 10, 2012, 05:11:10 AM
Thanks Hood. Looks like I misinterpret the sentence about index homing in your first message. You said you were doing homing external to Mach, so I concluded that you implied that Pokeys would allow you to do it internally in some way.

Dan
340  Third party software and hardware support forums. / PoKeys / Re: Pokeys tests on: May 10, 2012, 04:19:25 AM
Hi Hood,

Got a question for you. How would you go about doing homing using a servo's index pulse? I imagine that after Mach finishes its regular homing routine and bounces off the switch I will have to use a macro that will rotate the motor in a set direction till it detects the index (not sure how to do that either). But will a macro be able to see a pulse as short as a servo's index? I am going to use an ESS which will see the pulse no problem, but I am concerned how a macro will see it?

Dan
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