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Thread: Hoss's G0704

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  1. #6201
    Join Date
    Sep 2011
    Posts
    281

    Re: Hoss's G0704

    [QUOTE=diyengineer;1673776]I need to modify my gib lock handles. I have the dro scales slightly in the way.[/QUOTE
    I am interested in how you plan on doing this. I have the same problem. so lots of pics please
    Colten Edwards http://www.cncsigns.ca

  2. #6202
    Join Date
    Jan 2011
    Posts
    91

    Re: Hoss's G0704

    After going through the break in cycle on my new G0704 my first project is a mounting plate for a spindle on my plasma table and I got one hole drilled and it blew the motor fuse the 10 amp one, it sounded like it loaded up a little but didn't stall? New Viking drill bits in 1/2 aluminum with lube. :-(
    It seems to be an odd size and no one around had any so I had to order them online. Is this a sign of motor or controller board issues?

  3. #6203

    Re: Hoss's G0704

    Not necessarily.
    It might be a good idea to step up to the 1/2 with a 1/4" pilot hole first.
    Hoss
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com

  4. #6204
    Join Date
    Jan 2011
    Posts
    91

    Re: Hoss's G0704

    The hole size is #7 for 1/4 20 tap, the material is 1/2". New fuses just showed up so I'll give it a go again.

  5. #6205

    Re: Hoss's G0704

    Ah, no that's not a good sign then.
    If it keeps popping them give grizzly a call.
    Hoss
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com

  6. #6206
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    Well phase 1 is going well for me so far. after some of the talk here recently I checked the table full travel movement and I am lucky enough to be smooth all the way. The only this that was giving me trouble was the Z axis seemed to be wobbling a bit a getting tight on one side of the screw. I think I have most of that worked out so far. Hopefully it will get me going until I can get the ball screws installed (already here and waiting). Here is a picture of my progress. The caulk, in the chip tray, is curing (7 days, wow that is a long time). I will start on the enclosure tomorrow and also the wiring of the motors to the electronics. Then next week put in the flood coolant system since the caulk will be dry by then.

    Attachment 274204

  7. #6207
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    Hoss, for the PDB3 lifting plate, would mild steel be strong enough or is something like cold rolled steel a better choice? Sorry I don't know, well anything, about the different steels yet. Especially as it relates to how well they mill.

  8. #6208

    Re: Hoss's G0704

    Mild steel is fine for the lifting plate and the lever arm though if you had some O1, A2, D2 or P20 for the lever arm all the better, the rest of the brackets are aluminum.
    Hoss
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com

  9. #6209
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    Thanks Hoss!

    I started putting the back panel together. Ran into a few issues with local corrugated board available being too think so I opted for something called economy plastic sheet. It is 0.100 thick so it rattles a little bit. Looking for something I can use to shim the panels toward the inside of the enclosure so they can be sealed with silicone. Would be better if the stuff was white but don't really care just looking for something inexpensive and it was about the same price as the corrugated.

    Attachment 274768

  10. #6210
    Join Date
    Jan 2013
    Posts
    630

    Re: Hoss's G0704

    I used this on mine. The corrugated white board and the plexi I used where both a little thin to be tight in the channel of the 80/20 extrusion. The tang on this take up just enough room to wedge everything together.

    MD Building Products 1/2 in. x 17 ft. White Vinyl Gasket Weatherstrip-78394 - The Home Depot

  11. #6211
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    I am having a rough time tuning the motors. I figured out that I had the drivers set to default and since I am using a smooth stepper board that it needs to be set to specifics. I used 1/8 stepping from one of Hoss's videos. I have been playing with the steps per rev from 1600 (for the 1/8 stepping from the manual on the driver) to 200 some other reading and videos. I finally found the calibrations button on the settings page just above the reset button and even though the system is set to inches I have to measure in mm to keep the motor running decently. which of course means that anything I try to cut will be super small. Also if I do the calibration while measuring the movement in inches it wants to set to the steps per rev to around 170,000. Any ideas on what I may be doing wrong? this is just the X axis so far, have not tried the other 2 yet.

    Here is a little more info on my setup for reference.
    Windows 7 64bit
    USB smoothstepper with C25 breakout board from CNC4PC.
    KL-5056D driver for Nema23 570oz
    G0704 Mill (of course)

    Edit: Also I am using direct drive to the factory screws still.

  12. #6212
    Join Date
    Aug 2005
    Posts
    1091

    Re: Hoss's G0704

    Assuming that you have set your base units in Mach3 to mm.
    a stepper motors has 200steps/rev. for a 1/8 microstep drive, thats 1600 steps/rev.
    Assuming you are using ballscrews with a 5mm lead (5mm per rev) that means that 1 motor rev (1600 steps) will move the axis 5mm.
    So you need (1600steps/5mm) 320 steps to move the axis 1mm

    If you are using inches as your base units then you need (320 x25.4) 8128 steps/inch

    Cheers,

    Peter
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com/store

  13. #6213
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    I am using inches and the factory screw not the ball screws yet.

  14. #6214
    Join Date
    Feb 2015
    Posts
    37

    Re: Hoss's G0704

    This post is of immense help to me too. I have been unsure as to how to set up my motors. Now I have a solid clue. Thank you.
    Quote Originally Posted by phomann View Post
    Assuming that you have set your base units in Mach3 to mm.
    a stepper motors has 200steps/rev. for a 1/8 microstep drive, thats 1600 steps/rev.
    Assuming you are using ballscrews with a 5mm lead (5mm per rev) that means that 1 motor rev (1600 steps) will move the axis 5mm.
    So you need (1600steps/5mm) 320 steps to move the axis 1mm

    If you are using inches as your base units then you need (320 x25.4) 8128 steps/inch

    Cheers,

    Peter

  15. #6215

    Re: Hoss's G0704

    The stock screws are x,y=10 tpi, z=6 tpi.
    200x8x10=16000 steps/per for the x and y.
    200x8x6=9600 steps/per for the z.
    The driver settings can be found on #6 here, the defaults are not usually set to anything useful.
    FAQs
    Are you sure you have the smoothstepper configured correctly?
    I've never used one but this should help.
    http://www.soigeneris.com/Document/W...othStepper.pdf
    Hoss
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com

  16. #6216
    Join Date
    Jun 2013
    Posts
    75

    Re: Hoss's G0704

    I have mine set to around 16000 steps/in for each axis, same ball screws in each for an X2. It should not run better in mm or in, you just have to have the right values to represent the same speed whichever units its in. What are the motors doing that you say it won't run properly?

  17. #6217
    Join Date
    Feb 2007
    Posts
    4553

    G0704 Enclosure

    Daniel,

    I don't know if you are interested however I have a very nice brand new steel enclosure with safety glass windows that fits the G0704.

    Retail was $1,600, I would take $750.

    Dimensions: 45L x 30W x 58H inches
    Shipping Weight: 400 pounds.

    Jeff...
    Patience and perseverance have a magical effect before which difficulties disappear and obstacles vanish.

  18. #6218
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    OK way better on Hoss's recommendation. Thanks for the formula. I was short a 0 and the velocity was WAY too high. I would have been asking about the Z next. I knew it had a larger diameter screw so I didn't expect it to the be the same. Thanks again for the numbers. I was able to draw a 3 inch circle that looks pretty good considering I have not done much to adjust the backlash and still need to tram the table. I guess that is what happens when your internet and CAM software are on the second floor and the mill is in the basement. I need to get my printer back on the network so I can print the specs out.

    One more question. I currently don't have the Sherline 1/2 pulse turned on and I see in the #6 FAQ you linked it says to set that. How would that change my setup it I turn it on now? Depending on the interpretation I could see it causing the movement to halve or double unless that is for something completely different.

  19. #6219

    Re: Hoss's G0704

    Sherline 1/2 pulse mode won't change your settings, it's for giving the drivers a longer pulse width which can smooth out any jerky movement if you have any.
    Automation Tech has always recommended it for their drivers as well as some others.
    Hoss
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com

  20. #6220
    Join Date
    Mar 2013
    Posts
    42

    Re: Hoss's G0704

    Now I have to figure out what is going on with the Z axis screw. It is a bit wobbly. The oldham coupler doesn't seem to wobble so I was thinking I got the threading straight. so either something else is out of whack or the screw may be bent. It is workable but I don't like dial indicator movement while I am trying to tram the mill in. I loosened the 4 screws on the column cap to try to get a better line up, but the cap and motor assembly wobble around by 0.1 or more. Hoping I don't have to buy a replacement factory screw just to replace it with a ball screw in a month.

Page 311 of 344 211261301309310311312313321

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