DDSCV1.1 3 and 4 axis offline motion controller

[BenOZ]

Been working on this for a few months now. Trying to find a nice way to mount the controller. Didn't come up to bad albeit with a few mods to the PC case.
There's one more power supply to go in for the spindle motor.

Once that's done i'll be up and running :)

[Boyan Silyavski]

Been working on this for a few months now. Trying to find a nice way to mount the controller. Didn't come up to bad albeit with a few mods to the PC case.
There's one more power supply to go in for the spindle motor.

Once that's done i'll be up and running :)

Not bad. Very nice!

What drives are that? Do you have cooler in front of enclosure near them ? Or just the enclosure other coolers?

[BenOZ]

Thanks Boyan,
The drivers are just generic Chinese brand set to half step.
At the moment i only have one fan at the rear blowing in... i will replace this with a bigger fan soon and would like to use some smaller ones near the drivers. This is still a work in progress.

[AlexDoran]

Hi there, im currently designing my own CNC Router, i had planned to use this controller. On my longest /Axis (X Axis here in the UK) i have Dual Ballscrews and 4nm Nema23's, i see it has already been mentioned that the controller cannot provide individual homing for each screw (by utilizing the A Axis). I see there are examples of the controller providing signal to each of the drivers, im just wondering if i am likely to encounter any problems with the gantry running out of tram using this method? I plan to use the AM882 drivers.

Thanks

Alex

[m_c]

Hi there, im currently designing my own CNC Router, i had planned to use this controller. On my longest /Axis (X Axis here in the UK) i have Dual Ballscrews and 4nm Nema23's, i see it has already been mentioned that the controller cannot provide individual homing for each screw (by utilizing the A Axis). I see there are examples of the controller providing signal to each of the drivers, im just wondering if i am likely to encounter any problems with the gantry running out of tram using this method? I plan to use the AM882 drivers.

Provided you don't crash the machine and cause one axis to stall and twist the gantry, then it's not likely to be a problem. You just need to ensure you have some method to re-align the gantry if you do. If it was me, I'd probably just setup some accurate endstops at one end, and slowly run the gantry into them to square it up again. Then re-home it to regain position.

[Neale]

I use a CSMIO/IP-M to run a two-motor X axis (i.e. X master with A slaved to it). The controller "supports" this mode only as far as copying X output to the A output, in effect just ensuring that it keeps the two axes in sync. There is no dual-homing mechanism (you have to pay around 3 times as much for the IP-S for that, although it does do the job very well). To make sure that the gantry is square, at the beginning of a session I home the axes in the usual way. I then hit e-stop, which takes power off the steppers and I can turn the A stepper by hand. Both X and A axes are fitted with home switches. The X axis home switch is used for normal homing but by turning the A motor, I can adjust until the LED on the A proximity switch starts to flicker. I have adjusted the home switches and their triggers so that the gantry is square when both X and A just trigger their respective switches. So, I have now manually checked that the gantry is square (to within a step or so on the motor, which with 5mm lead ballscrews and a metre-long gantry is pretty close). I can reset the control box, do another homing operation (both because Mach3 insists on this after a reset and also to double-check that all is properly homed) and I'm ready for machining. It is very unusual for the gantry to go out of square unless I hit e-stop during operation or I get a motor stall (rare now that I have tuned things). Even between sessions with everything shut down and restarted, the gantry is seldom out of square by more than some tiny amount.

You might be able to do something similar with the controller under discussion as the squaring adjustment is completely independent of the controller. I keep thinking of trying to automate the "manual" steps here, but it's so easy to do it's hardly worth the effort.

[AlexDoran]

Provided you don't crash the machine and cause one axis to stall and twist the gantry, then it's not likely to be a problem. You just need to ensure you have some method to re-align the gantry if you do. If it was me, I'd probably just setup some accurate endstops at one end, and slowly run the gantry into them to square it up again. Then re-home it to regain position.

That sounds like a sound solution to me (As long as i dont have any major mis-haps).

I use a CSMIO/IP-M to run a two-motor X axis (i.e. X master with A slaved to it). The controller "supports" this mode only as far as copying X output to the A output, in effect just ensuring that it keeps the two axes in sync. There is no dual-homing mechanism (you have to pay around 3 times as much for the IP-S for that, although it does do the job very well). To make sure that the gantry is square, at the beginning of a session I home the axes in the usual way. I then hit e-stop, which takes power off the steppers and I can turn the A stepper by hand. Both X and A axes are fitted with home switches. The X axis home switch is used for normal homing but by turning the A motor, I can adjust until the LED on the A proximity switch starts to flicker. I have adjusted the home switches and their triggers so that the gantry is square when both X and A just trigger their respective switches. So, I have now manually checked that the gantry is square (to within a step or so on the motor, which with 5mm lead ballscrews and a metre-long gantry is pretty close). I can reset the control box, do another homing operation (both because Mach3 insists on this after a reset and also to double-check that all is properly homed) and I'm ready for machining. It is very unusual for the gantry to go out of square unless I hit e-stop during operation or I get a motor stall (rare now that I have tuned things). Even between sessions with everything shut down and restarted, the gantry is seldom out of square by more than some tiny amount.

You might be able to do something similar with the controller under discussion as the squaring adjustment is completely independent of the controller. I keep thinking of trying to automate the "manual" steps here, but it's so easy to do it's hardly worth the effort.

Ok again so i should be ok going this route then, the dimensions of my X & Y are 1200mm x 670mm, using 15mm Linear Rails, RM2010 Screws powered by 4nm Nema23.

Thanks Again

Alex