DDCSV1.1 4 Axis controller

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blades:
Ok, I'm about ready to take a hammer to this controller! Per my previous post, I was having trouble with my configuration because my G540 runs in 10x microstepping by default, and cannot be changed. This forced my to use a Z step setting number of 24,000 steps-per-inch (I'm running, or trying to run in inch mode). Max setting is supposed to be not over 10,000. At this setting, my Z-axis just hummed in program running mode, such as when trying to home. When I set this down to a lower number (12,000), it worked perfectly other than being off by 50%. So, I replaced the G540 with some TB6600 motor drivers where I can set microstepping. It was working perfect again on X & Y. I now have Z step setting @ 2400 with the new motor driver (no microstepping), and it's doing the same thing again! Motor won't even move in manual mode unless I drop the Z number to something well below the 2400 I need it to be.
WHAT THE HECK IS GOING ON WITH THIS STUPID THING?? :doh:
It didn't like 24,000 with the G540, and now it doesn't like 2400 with the TB6600 drivers! There is nothing wrong mechanically with the Z axis, it runs very smooth when I set an artificially low step number.

PPRINT:
Bill, I'm sorry the control setup is giving you fits. This sort of thing stresses me to no end so I am empathetic to those going through it.

I'm not sure if I will be able to do anything to help you, but with some basic information I might be able to come up with some things that might point you in the right direction.

I'm a ground level sort of guy, so I have to start at square one when I solve problems with my projects. Can you post the step angle of the motors you are using , the pitch diameter of your pulleys, and the pitch of your z-axis screw please.

Rob

blades:
Hey Rob, I truly appreciate any help at all!
The motors are pretty basic, standard NEMA 23 motors. 1.8 deg/step.
I'm not sure of the actual PD of the pulleys, but it's a 1:1 belt drive with 20-tooth pulleys on a 3mm pitch belt, to a 12 TPI lead screw (basically a 1:1 drive to the lead screw). The driver is set up with no microstepping.

The X & Y run on 20-tooth pulleys on a 3mm pitch belt. They work perfectly fine.

I also tested a different motor when I had the G540 hooked up, and got identical results, so it's not a motor issue.

PPRINT:
Bill, as you already know your math is correct on the steps.

Have you worked out parameter #416 which is "the time between DIR and pulse" and #417 which is "the width of the pulse signal"? I know in my case these two parameters took a bit of work to get correct just to get motion with the MPG.

I also had to futz with the start and stop acceleration for smooth movement.

I'm just shooting at stars here so be patient. This is how I trouble shoot and with enough work it all gets resolved.

Rob

Edit...per the G540 manual parameters $416 and #417 should be set to 200.

blades:
Hey Rob,

Thank you for that input. I had not really messed with those settings too much, but I think you have landed on something here.
I only had 416 (settings went from 416 to 418, with no 417). I set it to 200 (it was @ 300), but no change. So I adjusted #33 (motor start speed) to 20 (was @50), and it started working.

Now this has me wondering if I wasted all that time & $$ replacing the G540 with the new drivers. After all, it was working fine in manual jog mode. My assumption was that because I was so far beyond the 10,000 max step number that the controller wasn't happy with that.
Too bad I already cut off all the D-sub connectors I painstakingly soldered on for the G540. :palm:

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