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Forum: MechMates already cutting Wed 27 May 2015, 12:31
Replies: 735
Views: 484,927
Posted By KenC
I'll just shim the Angle. Save the drilling &...

I'll just shim the Angle. Save the drilling & tapping chore. Self-levelling epoxy? Too messy for my liking.
Anyway, if you are really as precision as I imagine you are, you will still Shim the...
Forum: MechMates already cutting Mon 08 December 2014, 23:18
Replies: 735
Views: 484,927
Posted By KenC
Go for MS plates. 3mm thk is more then ample,...

Go for MS plates. 3mm thk is more then ample, actually 2mm would do. IF you are only making one set, you can hand fabricate with the use of holesaw & power grinder from scrap metal lying around..
...
Forum: MechMates already cutting Mon 08 December 2014, 21:21
Replies: 735
Views: 484,927
Posted By KenC
T5 belt seems big but it will work. MDF is only...

T5 belt seems big but it will work.
MDF is only good for short term fix. I would suggest properly seal the wood with a few coat of paint.
With 3:1 belt reduction, you can use your 30T is actually...
Forum: MechMates already cutting Sun 07 December 2014, 21:58
Replies: 735
Views: 484,927
Posted By KenC
15T for 12.7 shaft? May I ask what timing...

15T for 12.7 shaft? May I ask what timing belt/pulley you are using?
Forum: MechMates already cutting Fri 05 December 2014, 20:18
Replies: 735
Views: 484,927
Posted By KenC
Gearbox torque rating as the name implies is the...

Gearbox torque rating as the name implies is the rated torque the gearbox can handle. I reckon the gears &/or other parts of the gearbox will not live long with higher torque even though it can...
Forum: MechMates already cutting Thu 04 December 2014, 23:15
Replies: 735
Views: 484,927
Posted By KenC
300 seem right. if you are not doing 3D carving,...

300 seem right. if you are not doing 3D carving, just 2D stuff, you can even live with 100~200. Every little bit helps. that is what I would think.
Forum: MechMates already cutting Thu 04 December 2014, 22:30
Replies: 735
Views: 484,927
Posted By KenC
Bruce, your problem triggers my curiosity......

Bruce, your problem triggers my curiosity... still can't stop thinking about it.
Maybe we could try other Zero $$$ solution.

Micro-stepping does affect the torque. as a rule of thumb (no exact...
Forum: MechMates already cutting Thu 04 December 2014, 20:43
Replies: 735
Views: 484,927
Posted By KenC
Not suspecting the PSU. higher V means higher top...

Not suspecting the PSU. higher V means higher top speed, which isn't you problem now.

The only thing you had not tried is tuning the AN882. Maybe this is where the issue lies.

I had the older...
Forum: MechMates already cutting Thu 04 December 2014, 02:12
Replies: 735
Views: 484,927
Posted By KenC
never used AM882 before, but I do know it is a...

never used AM882 before, but I do know it is a DSP driver and you can tune it for best motor performance. did you went through the tuning procedures?

I'm using a very similar stepper motor for my...
Forum: MechMates already cutting Thu 04 December 2014, 01:45
Replies: 735
Views: 484,927
Posted By KenC
Actually, when selected correctly, the air spring...

Actually, when selected correctly, the air spring assist the motor to handle heavier load.

Sometimes, the wiring diagram can be wrong too... that would be the last thing we should suspect.

OK,...
Forum: MechMates already cutting Thu 04 December 2014, 00:17
Replies: 735
Views: 484,927
Posted By KenC
Even with 30T, this is odd. Still couldn't...

Even with 30T, this is odd.

Still couldn't pin point the problem but I am certain that the load is too heavy for the motor,

You also need to ensure the coils phase is correct when connected...
Forum: MechMates already cutting Wed 03 December 2014, 22:58
Replies: 735
Views: 484,927
Posted By KenC
Could had been too strong spring for the y car....

Could had been too strong spring for the y car. Nothing much to get concern with..
BTW,did you set the correct Max. Current for Z?
Or you should consider parallel coil for higher torque.
Forum: MechMates already cutting Fri 28 November 2014, 05:58
Replies: 735
Views: 484,927
Posted By KenC
the "free" thing to do now is re-tune the motor...

the "free" thing to do now is re-tune the motor to lower acceleration & velocity, write a short G-code doing repetitive up-down for the tuning purpose.
At least get you to continue cutting.
Forum: MechMates already cutting Fri 28 November 2014, 05:32
Replies: 735
Views: 484,927
Posted By KenC
24T pinion will give 25% more torque then 30T,...

24T pinion will give 25% more torque then 30T, should improve thing a tat. and cost very little time & money.

Did you do motor tuning for Z? you get loose steps?
Forum: MechMates already cutting Fri 28 November 2014, 05:23
Replies: 735
Views: 484,927
Posted By KenC
That isn't right.... the shaft should lock-up...

That isn't right.... the shaft should lock-up solid.

IMHO, unless broken, all brand/make stepper motors makes no different with MM.

Sound very much like a bad motor. Unlucky :( ....
Forum: MechMates already cutting Fri 28 November 2014, 05:04
Replies: 735
Views: 484,927
Posted By KenC
You should check the motor coils for continuity...

You should check the motor coils for continuity with a DMM before you swap them around.
Forum: MechMates already cutting Fri 28 November 2014, 04:57
Replies: 735
Views: 484,927
Posted By KenC
You ran out of hair to pull yet? LOL 1) Gas...

You ran out of hair to pull yet? LOL

1) Gas spring too strong.
2) to much load on the Z-axis motor, i.e. too heavy
3) 24T worked for me, not 30T. 24 T has higher mechanical ratio.
4) add Z-axis...
Forum: MechMates already cutting Sat 11 October 2014, 00:32
Replies: 735
Views: 484,927
Posted By KenC
For me, since need to do edge sanding, so while...

For me, since need to do edge sanding, so while I'm at it, I give my rounds a goo rub & no more chatters... Direct drive 24T (Still :p). Yes, Chris & Leon are right, bits do contribute a fair bit.
Forum: MechMates already cutting Fri 10 October 2014, 08:19
Replies: 735
Views: 484,927
Posted By KenC
@Fox Take it as a complement :D Fat is the...

@Fox
Take it as a complement :D
Fat is the sign of prosperity ;)
Stupid makes top politicians :rolleyes:

For many, enuf is not enough... doubling the res is all it required to solve the...
Forum: MechMates already cutting Fri 10 October 2014, 06:55
Replies: 735
Views: 484,927
Posted By KenC
@Bruce, In reality, there are no advantage to go...

@Bruce, In reality, there are no advantage to go from 1/8 microstep to 1/10. you are better off sticking with 1/8.
If you had attempted designing a belt reduction, you will not bother to go higher...
Forum: MechMates already cutting Thu 09 October 2014, 22:59
Replies: 735
Views: 484,927
Posted By KenC
big mechanical ratio. which improve resolution. &...

big mechanical ratio. which improve resolution. & the side effect are the torque goes up, but speed goes down.
Lead screw pitch is usually lower than Rack & pinion system. with Mod 1.0, 30teetch...
Forum: MechMates already cutting Thu 09 October 2014, 22:40
Replies: 735
Views: 484,927
Posted By KenC
A friendly reminder. Please do not expect belt...

A friendly reminder.
Please do not expect belt reduction will solve all your misery.
With belt reduction, you still need sanding for very smooth finishing, just lesser elbow grease.
Forum: MechMates already cutting Thu 09 October 2014, 21:59
Replies: 735
Views: 484,927
Posted By KenC
20T pinion doesn't have enough meat on it for the...

20T pinion doesn't have enough meat on it for the 1/2" motor shaft. using 23~24 tooth is right at the edge. Lesser teeth will improve the chatter a little but it still require sanding.
If you...
Forum: MechMates already cutting Thu 25 September 2014, 02:44
Replies: 735
Views: 484,927
Posted By KenC
I'm proud to declare that I'm from the "no limit...

I'm proud to declare that I'm from the "no limit switches required" camp :D

BUT it doesn't mean I can't get involve in conversation on setting up one. :p

I know the same switch does home, limit...
Forum: MechMates already cutting Thu 18 September 2014, 05:33
Replies: 735
Views: 484,927
Posted By KenC
I use dry lubricant spray can

I use dry lubricant spray can
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