Macap M7D problem/jamming - Page 3

Grinders are one of the keys to exceptional espresso. Discuss them here.
brughcoffee

Postby brughcoffee » Jan 11, 2019, 11:22 am

I know I'm a little late to this thread, but I feel your pain @jeffdt I found this thread by searching "jamming issues Macap M7D".

I would periodically have issues with my Macap M7D jamming when I first got it, especially with lighter roasts. I was using a La Spaziale LUCCA A53, which has a 53mm portafilter. I recently upgraded to a Linea PB ABR for our shop, which has a 58mm portafilter. I received the new machine on Monday - hooked it up Tuesday. I have had non-stop jamming issues since then. I have used all of these coffees previously on this grinder and while I had periodic jamming issues they are non-stop now. I have tried cleaning the grinder with RINZA tabs.

I have to weigh out each shot individually and grind them one at a time. If I load the hopper it instantly jams within grinding three doses.

The only difference was my switch to a 58mm portafilter, which means I have to grind a little finer to hit the same parameters. So, I'm assuming that the motor is unable to grind fine enough for modern espresso. However, this now makes sense why I would have periods of it jamming more than others and now it jamming non-stop. Since the "solution" is to grind coarser I will be unable to use this grinder with my Linea PB and it now makes me hesitant to use it with my LUCCA in a catering setting. I have not replaced the burrs, but when I reached out to Clive about getting more they said I hadn't gone through near enough coffee to need new burrs.

Very frustrating situation - if anyone has any updates or suggestions I'm all ears. At this point, I'm now looking into upgrading my espresso grinder setup.

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slipchuck

Postby slipchuck » replying to brughcoffee » Jan 11, 2019, 1:23 pm

I am wondering if it might be the burr geometry that is making that particular model jam?
Just a thought ..

Randy
“There is nobody you can’t learn to like once you’ve heard their story.”

DaveC

Postby DaveC » Jan 11, 2019, 1:33 pm

Reading the thread I am amazed that no one has checked.

1. That the capacitors are not faulty, they may have had a bad batch

2. That the correct spec cap is installed, perhaps the factory made a mistake on a batch.

These grinders shouldn't jam and the comment I read that any grinder can jam if you grind fine enough is not true. Some grinders can jam when you go really fine, but they shouldn't (and certainly not a grinder like yours) that's just poor design and all grinders will jam if you tighten them up so much that the burrs jam together.

I have used plenty of different grinders and it definitely sounds like something is wrong with the grinder and not just a bad design.

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jeffdt

Postby jeffdt » Jan 12, 2019, 6:34 pm

brughcoffee wrote:I know I'm a little late to this thread, but I feel your pain @jeffdt I found this thread by searching "jamming issues Macap M7D".

I would periodically have issues with my Macap M7D jamming when I first got it, especially with lighter roasts. I was using a La Spaziale LUCCA A53, which has a 53mm portafilter. I recently upgraded to a Linea PB ABR for our shop, which has a 58mm portafilter. I received the new machine on Monday - hooked it up Tuesday. I have had non-stop jamming issues since then. I have used all of these coffees previously on this grinder and while I had periodic jamming issues they are non-stop now. I have tried cleaning the grinder with RINZA tabs.

I have to weigh out each shot individually and grind them one at a time. If I load the hopper it instantly jams within grinding three doses.

The only difference was my switch to a 58mm portafilter, which means I have to grind a little finer to hit the same parameters. So, I'm assuming that the motor is unable to grind fine enough for modern espresso. However, this now makes sense why I would have periods of it jamming more than others and now it jamming non-stop. Since the "solution" is to grind coarser I will be unable to use this grinder with my Linea PB and it now makes me hesitant to use it with my LUCCA in a catering setting. I have not replaced the burrs, but when I reached out to Clive about getting more they said I hadn't gone through near enough coffee to need new burrs.

Very frustrating situation - if anyone has any updates or suggestions I'm all ears. At this point, I'm now looking into upgrading my espresso grinder setup.

I'm actually using the LUCCA A53 as well. I noticed something similar; it would jam ~90% of the time on a light-medium roast and probably 10% of the time on a darker roast. A 10% jamming rate may be usable at home, but not in a catering setting. So I'm stuck being unable to cater now as I can't afford a real grinder right now.

I contacted a local tech and he seemed interested in helping until I told him that I sent it back to Clive and they were unable to find a problem. I'm guessing he's thinking it's a factory defect and it would be a waste of his time to try to fix it. I don't know for sure.

To say that I'm disappointed in Clive Coffee over this whole thing is an understatement.

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jeffdt

Postby jeffdt » Jan 12, 2019, 6:36 pm

DaveC wrote:Reading the thread I am amazed that no one has checked.

1. That the capacitors are not faulty, they may have had a bad batch

2. That the correct spec cap is installed, perhaps the factory made a mistake on a batch.

These grinders shouldn't jam and the comment I read that any grinder can jam if you grind fine enough is not true. Some grinders can jam when you go really fine, but they shouldn't (and certainly not a grinder like yours) that's just poor design and all grinders will jam if you tighten them up so much that the burrs jam together.

I have used plenty of different grinders and it definitely sounds like something is wrong with the grinder and not just a bad design.

At least one other person suggested the capacitor(s) may be bad, and it seems like a good possibility. I just don't have the equipment or knowledge to check!

DaveC

Postby DaveC » replying to jeffdt » Jan 12, 2019, 10:03 pm

I meant that you have not replaced it already...it's the next move you should make because the caps are cheap. I didn't mean to bother testing it.

Engelstein

Postby Engelstein » Jan 22, 2019, 11:40 pm

Wow, I'm so beyond annoyed I can't even explain it right now.

I had this same problem. I live in the same town as Clive. I was told be them they have never heard of this happeneing and yet I see they have posted in this thread AND had units returned with no recourse.

I'm with Jeffdt, the after the sale service from Clive is Appauling for purchases of this magnitude. I would strongly advocate that a consumer buy elsewhere.

I also got the same reply from Clive of "use a larger dose and grind coarser and you won't have this problem". I shared this with the roadter of the coffee we ise and they laughed. Frustrated, I actially tried this and it still jams.

To OP's reference we're ~7-7.5 on the dial.

I've been dealing woth this for over a year and Clive should have taken this back and replaced it long ago.

boomer28

Postby boomer28 » Feb 01, 2019, 1:23 am

Small comfort to those having problems, but I am SOOOOO glad I read this thread as I just got offered a "killer" deal on a used MD7 from a guy who in retrospect seemed a little too happy to drop his price and be gone with hit....