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Forward Step / Backward Step - Vexta Question
8 years 5 months ago #110606
by Grotius
Replied by Grotius on topic Forward Step / Backward Step - Vexta Question
@Hi Brenda,
For your motor scaling, you can use following example, if your drive is up to 10000 you know what to change :
## Calculation ##
# drive : 5000 steps / rev
# pitch : 4 mm / rev
# calcutation : 5000 / 4 =
# scale = 1250
The stepconfig wizzard is very confusing to me. So this formula makes it very simple to handle.
For your motor scaling, you can use following example, if your drive is up to 10000 you know what to change :
## Calculation ##
# drive : 5000 steps / rev
# pitch : 4 mm / rev
# calcutation : 5000 / 4 =
# scale = 1250
Code:
[AXIS_2] # Z-axis
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25
MAX_ACCELERATION = 100
STEPGEN_MAXACCEL = 150
SCALE = 1250
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -1000
MAX_LIMIT = 1000
HOME_LATCH_VEL = 5
HOME_SEARCH_VEL = 10
HOME_FINAL_VEL = 5
HOME_OFFSET = 0
HOME_SEQUENCE = 1
The stepconfig wizzard is very confusing to me. So this formula makes it very simple to handle.
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8 years 5 months ago #110611
by BrendaEM
Replied by BrendaEM on topic Forward Step / Backward Step - Vexta Question
Thank you.
I used a Arduino utility I wrote RDL to test my calculations each axis as I was building the machine. It gets tiresome turning ballscrews by hand.
forum.arduino.cc/index.php?PHPSESSID=0qo...ic=469343.msg3213804
I post this thing here and there, because I thought that people could sort out a lot before they come here and ask a lot of noob questions like I have.
Without microstepping 2 of my machine's axis resolution is limited to .02mm, with microstepping on it would be .01mm. Accuracy may vary. 10mm screw, .72deg motors (500 steps).
I used a Arduino utility I wrote RDL to test my calculations each axis as I was building the machine. It gets tiresome turning ballscrews by hand.
forum.arduino.cc/index.php?PHPSESSID=0qo...ic=469343.msg3213804
I post this thing here and there, because I thought that people could sort out a lot before they come here and ask a lot of noob questions like I have.
Without microstepping 2 of my machine's axis resolution is limited to .02mm, with microstepping on it would be .01mm. Accuracy may vary. 10mm screw, .72deg motors (500 steps).
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8 years 5 months ago #110612
by BrendaEM
Replied by BrendaEM on topic Forward Step / Backward Step - Vexta Question
BTW, is the HAL I am using for Forward Step / Backward Step (Vexta) So Far.
Todo: Limit switch issues. They are being read, and home, almost. Could be bouncing, could have been the options I chose whilst running Stepconf.
Todo: Limit switch issues. They are being read, and home, almost. Could be bouncing, could have been the options I chose whilst running Stepconf.
Attachment not found
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8 years 5 months ago #110614
by BrendaEM
Replied by BrendaEM on topic Forward Step / Backward Step - Vexta Question
I shot a small jogging video.
www.facebook.com/brenda.make/videos/1710303622380662/
I will put more some videos on Youtube, but like many people youtube ripped me off for adsense, so I'm not too happy with them right now.
For now, I am only using 100 for acceleration because the cart needs to be immobilized. I think the motors will go faster, but this is fast enough to learn how to crash a CNC machine, and send milling bit shrapnel across the garage.
Oddly, the machine looks bigger in person. The frame 4 feet wide and 5 feet long. The work envelope will be 910mm x 1100 x 120mm ( 35" wide x 43" long x 4.5" high ) The weight is about dontwannadroponme, or perhaps just under 250 lbs.
www.facebook.com/brenda.make/videos/1710303622380662/
Thanks everyone : )
www.facebook.com/brenda.make/videos/1710303622380662/
I will put more some videos on Youtube, but like many people youtube ripped me off for adsense, so I'm not too happy with them right now.
For now, I am only using 100 for acceleration because the cart needs to be immobilized. I think the motors will go faster, but this is fast enough to learn how to crash a CNC machine, and send milling bit shrapnel across the garage.
Oddly, the machine looks bigger in person. The frame 4 feet wide and 5 feet long. The work envelope will be 910mm x 1100 x 120mm ( 35" wide x 43" long x 4.5" high ) The weight is about dontwannadroponme, or perhaps just under 250 lbs.
www.facebook.com/brenda.make/videos/1710303622380662/
Thanks everyone : )
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