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441  Tangent Corner / Tangent Corner / Re: X-Mass Gift for my son on: December 25, 2011, 01:40:26 PM
And I though you weren't having fun lately, Brian Wink

Brilliant work considering it only took you 3 days.

Dan
442  General CNC Chat / Show"N"Tell ( Your Machines) / Re: China HF-start plasma CNC design! on: December 20, 2011, 10:12:30 AM
This is cool! Thanks for showing.

Dan
443  Mach Discussion / General Mach Discussion / Re: Mach3 4.0 Rev Update on: December 17, 2011, 01:32:46 PM
Hood,

Is this version with the faster update rate available somewhere? Has it ever been released to the public? Somehow, I believe I had it downloaded somewhere, but can't find. But I think at that time they mentioned 20Hz. Is it now 50Hz?

Dan
444  General CNC Chat / Show"N"Tell ( Your Machines) / Re: The Laser Project. on: December 15, 2011, 12:17:33 PM
Thanks, Tweakie. Will be waiting to hear more results from you guys.

Dan
445  General CNC Chat / Show"N"Tell ( Your Machines) / Re: The Laser Project. on: December 15, 2011, 11:43:52 AM
Hi Tweakie,

Thanks for the description. So it isn't as smooth as it is with the plugin. The axis has to stop and then the laser comes on and off and then it proceeds to the next point. Seems to be slower also.

It is the direction line of the B axis that you're using, right?

Is there any meaning for this in this Gcode:

T1
S8000 M3 f1500

Dan
446  General CNC Chat / Show"N"Tell ( Your Machines) / Re: The Laser Project. on: December 15, 2011, 09:18:32 AM
Hi Tweakie,

This sounds interesting. Can you please explain how it works or post a Gcode snippet? How is the modulation done in the Gcode?

Thanks,
Dan
447  General CNC Chat / Show"N"Tell ( Your Machines) / Re: Conect 121 lathe retro on: December 09, 2011, 07:06:16 AM
Thanks for the info on the Estop, Hood. Does it work well on your other machines? I don't feel comfortable about merely cutting the power to the drives. They still have enough bus voltage to move a bit  I think. I cut power to motors and switch in braking resistors. Depending on the resistors values the motor stop pretty much instantaneously.

Sounds a quite capable lathe.

Dan
448  General CNC Chat / Show"N"Tell ( Your Machines) / Re: Conect 121 lathe retro on: December 09, 2011, 06:15:08 AM
Hood,

Main reason I don't like large motors on small machines is I am afraid the motor would have enough power to damage the machine should something go wrong. But you're using a servo and can limit the current/torque to a value you like.

Would you share your E-stop diagram?

What size is the lathe? What are the travels?

Dan
449  General CNC Chat / Show"N"Tell ( Your Machines) / Re: Conect 121 lathe retro on: December 08, 2011, 03:38:15 PM
Hood,

Looks good! Going to be nice little machine... hmm... somehow it doesn't sound right - small machine in conjunction with Hood Grin

Did you go with servos just because you had them lying around? Besides, looks like an overkill to use a 400W servo on the Z of this little lathe?

Dan
450  General CNC Chat / Show"N"Tell ( Your Machines) / Re: Z Axis Counter Weight on: December 05, 2011, 01:38:10 AM
Troy,

The correct way would be figuring the centre of gravity of the head and anchor it there, I think.

Regarding vibration dampening, this should not be a factor to be considered as the chain cannot transfer any substantial vibrations. The vibrations will be dampened by the head mass and also transferred to the column and base via the linear slides and thus it's important to have well preloaded linear blocks.

Dan
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