Messages

51

General Mach Discussion / Re: A couple of questions re servo's

« on: February 01, 2013, 09:53:10 PM »

I'm in agreement with Machinehead57.
My router uses four motors, two matched and sharing/slaving the y axis/b axis, and the other two on z and x.   the Y motors are 75VDC, and the x and z are 56VDC. Initially I too was nervous about running at the same voltage and rewired the toroid to output the two votages(after rectification).  But then the "one fault all fault" didn't work.  I was informed as Machinehead57 notes that all the motors can run off the 75VDC .  I believe it was Dan Mauch who told me this.
It is very unlikely I will ever bee running all the motors full out causing the motors to burn up.   HOWEVER, there will be a slight increase in the brush wear... but I haven't had any problems so far.    

It IS neat to see the smaller motors zip about if I decide to run the shared 75VDC yaxis motors at their max...

I remember testing it on the "roadrunner" .    Although I built the machine strongly, It really shot through the program with gusto causing a little nervousness.  But didn't notice much heat in the smaller motors.   In real use, the smaller voltage motors work just fine.

52

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 28, 2013, 01:24:07 PM »

Ah!  I was thinking in terms of vertical deflextion of the drill arm.  With the support arm in the secure mode, maybe a much higher load could be applied downward for those inevitable big tressful drilling operations, although the arm's loading specs may far exceed the spindle's capabilities. I have no idea of how much flex there might be vertically in the arm.

I hope you continue to provide us with your detailed construction activities as you have done with this drill.
The other videos of your punch installations were nice to see!

53

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 28, 2013, 11:23:27 AM »

Hi Zafar,
 Looking Great!
  I'm curious about the drill radial arm.  Will there be times when light use will make clamping of the support unneeded?  Originally, the drill did not use the support arm. Otherwise(heh), has the company yet contracted you to install your newfangled auto-clamping system so that this machine operation will be carried out at the control panel?
On my little bridgemill I also installed a microswitch at the spider handle on the bridge support.  It rides on the flange of the tightening screw and allows adjustment only when the spider/screw clamp is loose.  I thought of maybe adding a motor with gear/belt reduction(high torque) to replace the manual clamping screw.  
Yours would obviously require a much more complex system for auto-clamping...and be way over budget considerations.

54

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 24, 2013, 08:10:56 AM »

Build Thread

 Piece of cake. Took a whole day for this exercise.

Hah, hah.  Piece of cake you say?   Well, compared to all the other operations....
 Nice!
But I am wondering.... If the radial arm brace is tightened into position vertically, will/do you have a lockout switch to prevent the radial arm from being raised or lowered until unlocking the brace?  Or will the brace always just float?  The machine could really rack itself if a command to raise or lower the arm were issued if the brace bracket was inadvertantly left tight.

55

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 19, 2013, 10:18:09 AM »

Here's another link for more on this project:
http://www.cnczone.com/forums/showthread.php?p=1224322#post1224322

Included is a video of first operation

56

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 18, 2013, 08:25:22 PM »

I meant Khalid.. rather than Zafar! in the above post.

57

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 18, 2013, 06:46:55 PM »

Hi Hood,
just to let you know if you haven't gone to CNCzone, Zafarsalam and Zafar! are entering in a parallel thread and conversing there.  Some extra information is being exchanged.  I don't offhand have the link right now but I was reading their posts this morning.

John M.

edit:  Here it is...
http://www.cnczone.com/forums/general_metal_working_machines/171471-cnc_conversion_radial_drill_-_novisa_tro_65_80_2000_a.html

58

Show"N"Tell ( Your Machines) / Re: CNC conversion of radial drill - Novisa TRO 65/80/2000

« on: January 17, 2013, 10:11:48 AM »

Eagerly waiting for more posts on this project!  

Love it!

That step under the Y bed...I believe it is a step to get better access to the table...
I need one of those in front of my tool chests to peer into the top drawers without standing on my toes.

59

General Mach Discussion / Re: Hi. Need help with x axis losing position.

« on: December 31, 2012, 08:00:55 PM »

My curiosity prompts me to ask .. Why?

60

General Mach Discussion / Re: Shoptask 1720 gold.

« on: December 18, 2012, 10:42:18 AM »

 
    I DID have a SHoptask 17-20 XMTC gold series. I actually built my own quadra lift for it and then sold it soon thereafter. It was a halfway decent machine for what it is. Probably the best of the 3 in 1 variety.    I actually painted my Shoptask a green color and have always wondered what happened to it. It was a lot of fun learning to use it.  If I remember correctly I even put dual motors DC on it.
Pete

Hi Pete,
Was this your machine?  I'm not sure of the model, but the quadra lift and DC motors are there.
...and its green.