CNC Router: made in India

[contactirfu]

Hi All,

This is goin to be the build log for my machine, the earlier log for the machine was a www.mechmate.com, since the group there was more focussed onteh mechmate I am moving the thread here where I can get more answers to my Q's. Welll for a start the machine was the inspiration from the Mechmate but does not resemble it in any way. I am active on the thread where theUHU controller are discussed and have made a controller based on those boards.

For a start look at the pictures of the build, and the previous stuff could be seen at http://www.mechmate.com/forums/showt...p?t=196&page=2

I thank Gerald for Inspiring many!

RGDS

Irfan

[contactirfu]

I had a few Q

before answering them you might want to take a look at the link in the previous forum where there is the history of this router build. And yes benny's belt based router also inspired me!

1. for the timing pulleys which i will be using to drive the pinion can i use just the grub screws to hold the pulley's in place or is it necessary to have a key to bind it with the shaft.

2. If only grub screws can be used tehn how many, I was about to put 3 each 120 degree apart........is it OK

3. I expecting a center distance of 325mm, will that matter much?

4. I will be using a HTD 8 mm pitch belt. is it OK

Regards
Irfan

[rustamd]

everything is just MHO

1. & 2. Set screw should be ok. I maybe would grind small flat on the shaft for set screw. One screw on flat and another 90* away should be more than enough, bu i suppose 3 will not hurt.

3. This will depend on how many tooth the pulleys are, i believe there is recomended number of teeth that should be in contact with belt at all times. But if enough teeth will be in contact, i would think it would be ok.

4. 8mm pitch HTD belt should be good. Mayne difference between belts are amount of backlash and tooth profile(i think). HTD shouldnt have much backlash.

[contactirfu]

Originally Posted by rustamd everything is just MHO 1. & 2. Set screw should be ok. I maybe would grind small flat on the shaft for set screw. One screw on flat and another 90* away should be more than enough, bu i suppose 3 will not hurt. 3. This will depend on how many tooth the pulleys are, i believe there is recomended number of teeth that should be in contact with belt at all times. But if enough teeth will be in contact, i would think it would be ok. 4. 8mm pitch HTD belt should be good. Mayne difference between belts are amount of backlash and tooth profile(i think). HTD shouldnt have much backlash.

Thnk you rustamd, I have a 1:3 reduction , meaning a 20 teeth pulley and another 60 teeth one!

[txcowdog]

Pretty heavy duty machine. What is your intended use? It looks good so far. Keep up the work and pictures. I'll help where I can.

[tenmetalman]

Irfan,
Just catching up on your progress on the router, I've a suggestion in the form of a question. could you mount the jackshaft & servo motor in between the rails of the gantry ? second Idea, if the threaded hole for the set screws are deep enough, put a second set screw on top of the first. this will prevent vibration from loosening the setscrews.

[svenakela]

Hey Irfan,
Where in India are you?

[contactirfu]

Originally Posted by tenmetalman Irfan, Just catching up on your progress on the router, I've a suggestion in the form of a question. could you mount the jackshaft & servo motor in between the rails of the gantry ? second Idea, if the threaded hole for the set screws are deep enough, put a second set screw on top of the first. this will prevent vibration from loosening the setscrews.

Paul I cannot have the Jackshaft in centre cause there's where the Y sliding comes into picture. Its like typical shopbot!

Cool Idea for the set screw stuff. I will get that incorporated!

Regards
Irfan

[contactirfu]

Originally Posted by svenakela Hey Irfan, Where in India are you?

I am in Bangalore! now changed to Bengaluru!

[contactirfu]

Originally Posted by txcowdog Pretty heavy duty machine. What is your intended use? It looks good so far. Keep up the work and pictures. I'll help where I can.

Intended Usage:

1. Wood Carving
2. Foam molds
3. Wax Patterns
4. Wood Prop manufacture
5. Wooden Patterns.

I will keep all updated on progress, i work on my machine every weekend's so the progress will be a bit slow. Any way's I am committed to complete it by January. So you will see a lot of Pictures.

[scott wiggins]

That looks huge. What size is the cutting area?
Scott

[contactirfu]

Originally Posted by scott wiggins That looks huge. What size is the cutting area? Scott

Originally planned to take up 4x8 ply sheets , there is more width to the working area (more than 4' ) to accommodate for a possible tool changer and a rotary 4th. axis