First Build 5 x 12 Steel Frame CNC router

[Davek0974]

I have a video of the machine doing slow movements of I think 4000mm/min. I have had one servo run away (my own fault, made a mistake in config) and I can confirm that the table can move a metric fuckton faster.

https://www.youtube.com/watch?v=5sMb4XmzuXc

LOL ;) nice unit of measure :)

[Chaz]

LOL ;) nice unit of measure :)

Ye, fairly standard UOM.

[Chaz]

LOL ;) nice unit of measure :)

Sorry, I know see what you were referring to (not the mm/min). Yep, very fast indeed.

[Scott Damman]

Made a bit more progress over the weekend,

Got one of the X axis screws mocked up

Here I am machining the spring loaded brackets that will act as X ballscrew mid supports. These will support the screw and when the gantry goes by will move out of the way on the pivot. I need to get some shoulder bolts still for these and do a bit more machining for clearance of the ballnut as it passes (to ensure that it cant get hung up on a change of direction).





I also got a air valve block installed on the gantry for all the air that the Z axis needs, also put a terminal block on the gantry in order to reduce the number of wires that needs to make its way back to the control. I ordered some 20 conductor shielded communication cable to go from the control to the gantry terminal block. Gives me a few extra wires incase I need any future expansions or additions.

Im getting excited as its closer and closer to cutting. I am waiting on new toothed pulleys for the Y and X as I made a mistake when ordering, once those are in it will be time for truing and squaring then cutting.

More to come....

[Scott Damman]

Some more progress made, I got the ballnut mount made and installed and also finished one of the ballscrew mid supports. I made a video of one of the ballscrew supports in action, I am just pushing the gantry back and forth. I pushed the gantry from one end to the other as fast as I could and this one support seemed to damp the ballscrew frequency. Im hoping to finish up this side tonight and then do it all over again on the other side.










I need to do some learning on tuning 2 X axis servos at the same time, if anyone has any suggestions im all ears.

[Scott Damman]

Made some good progress on the machine, I am to the point of wanting to run a gcode program, although there is alot to do before I can actually cut.

I loaded a sample Gcode program just to see all 3 axes move together

I moved the machine 12 inches away from X and Y and put my Z in the middle of travel and zeroed the DRO's for work start. When I hit cycle start (with my hand firmly on the e-stop...) I get a message "Move off limits before cycle start". I then checked the I/O window in CSMIO config and no limit switches are tripped. I tried a few other things within mach with no luck. I then turned off all limits (except e-stop) and I get the same message. Did some searching/reading on forums and didnt come across anything.

Anyone have any thoughts on what this could be? I hope its something simple that I just havent turned on/off?

I plan to a write up on the progress, just this issue has me frustrated so thought I would ask.

Thanks

[Chaz]

Made some good progress on the machine, I am to the point of wanting to run a gcode program, although there is alot to do before I can actually cut.

I loaded a sample Gcode program just to see all 3 axes move together

I moved the machine 12 inches away from X and Y and put my Z in the middle of travel and zeroed the DRO's for work start. When I hit cycle start (with my hand firmly on the e-stop...) I get a message "Move off limits before cycle start". I then checked the I/O window in CSMIO config and no limit switches are tripped. I tried a few other things within mach with no luck. I then turned off all limits (except e-stop) and I get the same message. Did some searching/reading on forums and didnt come across anything.

Anyone have any thoughts on what this could be? I hope its something simple that I just havent turned on/off?

I plan to a write up on the progress, just this issue has me frustrated so thought I would ask.

Thanks

Are you certain they are wired correctly (you should manually trigger them and check that they match the input on the Mach 3 screen).

Also, do you have any soft limits enabled?

[Scott Damman]

Are you certain they are wired correctly (you should manually trigger them and check that they match the input on the Mach 3 screen).

Also, do you have any soft limits enabled?

Sorry should have stated that, all limits were checked manually and all seem to correspond to the correct input. Soft limits were turned off during the troubleshooting process.

Jazz, system jogs great, homes correctly on all three axises. I tried MDI commands and get the message "Move off Limit before MDI command". Whats puzzling to me is that Mach says this even with all limits turned off.

thanks for the quick replies

[JAZZCNC]

Does it Jog Ok.? . . . . If so Post the G-code.

Try doing some MDI Commands. Like G0 x6 y6 (assuming inch units) or G1 x6 y6 f30.
If these work ok then I'd be suspect of the G-code.